CSY/reowolf Changeset - 95e019faaf52 · Centrum Wiskunde & Informatica (CWI)

Changeset - 95e019faaf52

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0 8 1

mh - 4 years ago 2022-03-29 18:18:12
contact@maxhenger.nl

Getting builtin component instantiation to compile

9 files changed with 40 insertions and 12 deletions:

src/protocol/ast.rs

src/protocol/eval/executor.rs

src/protocol/parser/mod.rs

src/protocol/parser/pass_definitions.rs

src/protocol/parser/pass_validation_linking.rs

src/protocol/parser/type_table.rs

src/runtime2/tests/mod.rs

std/std.global.pdl

std/std.random.pdl

0 comments (0 inline, 0 general)

src/protocol/ast.rs

➞

Show inline comments

@@ @@ -1649,336 +1649,339 @@ pub enum AssignmentOperator { @@
     ShiftedLeft,
     ShiftedRight,
     BitwiseAnded,
     BitwiseXored,
     BitwiseOred,
+}
 #[derive(Debug, Clone)]
 pub struct AssignmentExpression {
     pub this: AssignmentExpressionId,
     // Parsing
     pub operator_span: InputSpan,
     pub full_span: InputSpan,
     pub left: ExpressionId,
     pub operation: AssignmentOperator,
     pub right: ExpressionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub struct BindingExpression {
     pub this: BindingExpressionId,
     // Parsing
     pub operator_span: InputSpan,
     pub full_span: InputSpan,
     pub bound_to: ExpressionId,
     pub bound_from: ExpressionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub struct ConditionalExpression {
     pub this: ConditionalExpressionId,
     // Parsing
     pub operator_span: InputSpan,
     pub full_span: InputSpan,
     pub test: ExpressionId,
     pub true_expression: ExpressionId,
     pub false_expression: ExpressionId,
     // Validator/Linking
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum BinaryOperator {
     Concatenate,
     LogicalOr,
     LogicalAnd,
     BitwiseOr,
     BitwiseXor,
     BitwiseAnd,
     Equality,
     Inequality,
     LessThan,
     GreaterThan,
     LessThanEqual,
     GreaterThanEqual,
     ShiftLeft,
     ShiftRight,
     Add,
     Subtract,
     Multiply,
     Divide,
     Remainder,
+}
 #[derive(Debug, Clone)]
 pub struct BinaryExpression {
     pub this: BinaryExpressionId,
     // Parsing
     pub operator_span: InputSpan,
     pub full_span: InputSpan,
     pub left: ExpressionId,
     pub operation: BinaryOperator,
     pub right: ExpressionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum UnaryOperator {
     Positive,
     Negative,
     BitwiseNot,
     LogicalNot,
+}
 #[derive(Debug, Clone)]
 pub struct UnaryExpression {
     pub this: UnaryExpressionId,
     // Parsing
     pub operator_span: InputSpan,
     pub full_span: InputSpan,
     pub operation: UnaryOperator,
     pub expression: ExpressionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub struct IndexingExpression {
     pub this: IndexingExpressionId,
     // Parsing
     pub operator_span: InputSpan,
     pub full_span: InputSpan,
     pub subject: ExpressionId,
     pub index: ExpressionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub struct SlicingExpression {
     pub this: SlicingExpressionId,
     // Parsing
     pub slicing_span: InputSpan, // from '[' to ']'
     pub full_span: InputSpan, // includes subject
     pub subject: ExpressionId,
     pub from_index: ExpressionId,
     pub to_index: ExpressionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub enum SelectKind {
     StructField(Identifier),
     TupleMember(u64), // u64 is overkill, but space is taken up by `StructField` variant anyway
+}
 #[derive(Debug, Clone)]
 pub struct SelectExpression {
     pub this: SelectExpressionId,
     // Parsing
     pub operator_span: InputSpan, // of the '.'
     pub full_span: InputSpan, // includes subject and field
     pub subject: ExpressionId,
     pub kind: SelectKind,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub struct CastExpression {
     pub this: CastExpressionId,
     // Parsing
     pub cast_span: InputSpan, // of the "cast" keyword,
     pub full_span: InputSpan, // includes the cast subject
     pub to_type: ParserType,
     pub subject: ExpressionId,
     // Validator/linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub struct CallExpression {
     pub this: CallExpressionId,
     // Parsing
     pub func_span: InputSpan, // of the function name
     pub full_span: InputSpan, // includes the arguments and parentheses
     pub parser_type: ParserType, // of the function call, not the return type
     pub method: Method,
     pub arguments: Vec<ExpressionId>,
     pub procedure: ProcedureDefinitionId,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Method {
     // Builtin, accessible by programmer
+    // Builtin function, accessible by programmer
     Get,
     Put,
     Fires,
     Create,
     Length,
     Assert,
     Print,
     // Builtin, not accessible by programmer
+    // Builtin function, not accessible by programmer
     SelectStart, // SelectStart(total_num_cases, total_num_ports)
     SelectRegisterCasePort, // SelectRegisterCasePort(case_index, port_index, port_id)
     SelectWait, // SelectWait() -> u32
     // Builtin component,
     ComponentRandomU32,
     // User-defined
     UserFunction,
     UserComponent,
+}
 impl Method {
     pub(crate) fn is_public_builtin(&self) -> bool {
         use Method::*;
         match self {
             Get | Put | Fires | Create | Length | Assert | Print => true,
             ComponentRandomU32 => true,
             _ => false,
+        }
+    }
     pub(crate) fn is_user_defined(&self) -> bool {
         use Method::*;
         match self {
             UserFunction | UserComponent => true,
             _ => false,
+        }
+    }
+}
 #[derive(Debug, Clone)]
 pub struct LiteralExpression {
     pub this: LiteralExpressionId,
     // Parsing
     pub span: InputSpan,
     pub value: Literal,
     // Validator/Linker
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
 #[derive(Debug, Clone)]
 pub enum Literal {
     Null, // message
     True,
     False,
     Character(char),
     String(StringRef<'static>),
     Integer(LiteralInteger),
     Struct(LiteralStruct),
     Enum(LiteralEnum),
     Union(LiteralUnion),
     Array(Vec<ExpressionId>),
     Tuple(Vec<ExpressionId>),
+}
 impl Literal {
     pub(crate) fn as_struct(&self) -> &LiteralStruct {
         if let Literal::Struct(literal) = self{
             literal
         } else {
             unreachable!("Attempted to obtain {:?} as Literal::Struct", self)
+        }
+    }
     pub(crate) fn as_enum(&self) -> &LiteralEnum {
         if let Literal::Enum(literal) = self {
             literal
         } else {
             unreachable!("Attempted to obtain {:?} as Literal::Enum", self)
+        }
+    }
     pub(crate) fn as_union(&self) -> &LiteralUnion {
         if let Literal::Union(literal) = self {
             literal
         } else {
             unreachable!("Attempted to obtain {:?} as Literal::Union", self)
+        }
+    }
+}
 #[derive(Debug, Clone)]
 pub struct LiteralInteger {
     pub(crate) unsigned_value: u64,
     pub(crate) negated: bool, // for constant expression evaluation, TODO: @Int
+}
 #[derive(Debug, Clone)]
 pub struct LiteralStructField {
     // Phase 1: parser
     pub(crate) identifier: Identifier,
     pub(crate) value: ExpressionId,
     // Phase 2: linker
     pub(crate) field_idx: usize, // in struct definition
+}
 #[derive(Debug, Clone)]
 pub struct LiteralStruct {
     // Phase 1: parser
     pub(crate) parser_type: ParserType,
     pub(crate) fields: Vec<LiteralStructField>,
     pub(crate) definition: DefinitionId,
+}
 #[derive(Debug, Clone)]
 pub struct LiteralEnum {
     // Phase 1: parser
     pub(crate) parser_type: ParserType,
     pub(crate) variant: Identifier,
     pub(crate) definition: DefinitionId,
     // Phase 2: linker
     pub(crate) variant_idx: usize, // as present in the type table
+}
 #[derive(Debug, Clone)]
 pub struct LiteralUnion {
     // Phase 1: parser
     pub(crate) parser_type: ParserType,
     pub(crate) variant: Identifier,
     pub(crate) values: Vec<ExpressionId>,
     pub(crate) definition: DefinitionId,
     // Phase 2: linker
     pub(crate) variant_idx: usize, // as present in type table
+}
 #[derive(Debug, Clone)]
 pub struct VariableExpression {
     pub this: VariableExpressionId,
     // Parsing
     pub identifier: Identifier,
     // Validator/Linker
     pub declaration: Option<VariableId>,
     pub used_as_binding_target: bool,
     pub parent: ExpressionParent,
     // Typing
     pub type_index: i32,
+}
@@ \ No newline at end of file @@

src/protocol/eval/executor.rs

➞

Show inline comments

@@ @@ -566,389 +566,393 @@ impl Prompt { @@
                                     );
                                     Value::Array(heap_pos)
+                                }
                                 Literal::Tuple(lit_value) => {
                                     let heap_pos = transfer_expression_values_front_into_heap(
                                         cur_frame, &mut self.store, lit_value.len()
                                     );
                                     Value::Tuple(heap_pos)
+                                }
                             };
                             cur_frame.expr_values.push_back(value);
                         },
                         Expression::Cast(expr) => {
                             let mono_data = &heap[cur_frame.definition].monomorphs[cur_frame.monomorph_index];
                             let type_id = mono_data.expr_info[expr.type_index as usize].type_id;
                             let concrete_type = &types.get_monomorph(type_id).concrete_type;
                             // Typechecking reduced this to two cases: either we
                             // have casting noop (same types), or we're casting
                             // between integer/bool/char types.
                             let subject = cur_frame.expr_values.pop_back().unwrap();
                             match apply_casting(&mut self.store, concrete_type, &subject) {
                                 Ok(value) => cur_frame.expr_values.push_back(value),
                                 Err(msg) => {
                                     return Err(EvalError::new_error_at_expr(self, modules, heap, expr.this.upcast(), msg));
+                                }
+                            }
                             self.store.drop_value(subject.get_heap_pos());
+                        }
                         Expression::Call(expr) => {
                             // If we're dealing with a builtin we don't do any
                             // fancy shenanigans at all, just push the result.
                             match expr.method {
                                 Method::Get => {
                                     let value = cur_frame.expr_values.pop_front().unwrap();
                                     let value = self.store.maybe_read_ref(&value).clone();
                                     let port_id = if let Value::Input(port_id) = value {
                                         port_id
                                     } else {
                                         unreachable!("executor calling 'get' on value {:?}", value)
                                     };
                                     match ctx.performed_get(port_id) {
                                         Some(result) => {
                                             // We have the result. Merge the `ValueGroup` with the
                                             // stack/heap storage.
                                             debug_assert_eq!(result.values.len(), 1);
                                             result.into_stack(&mut cur_frame.expr_values, &mut self.store);
                                         },
                                         None => {
                                             // Don't have the result yet, prepare the expression to
                                             // get run again after we've received a message.
                                             cur_frame.expr_values.push_front(value.clone());
                                             cur_frame.expr_stack.push_back(ExprInstruction::EvalExpr(expr_id));
                                             return Ok(EvalContinuation::BlockGet(port_id));
+                                        }
+                                    }
                                 },
                                 Method::Put => {
                                     let port_value = cur_frame.expr_values.pop_front().unwrap();
                                     let deref_port_value = self.store.maybe_read_ref(&port_value).clone();
                                     let port_id = if let Value::Output(port_id) = deref_port_value {
                                         port_id
                                     } else {
                                         unreachable!("executor calling 'put' on value {:?}", deref_port_value)
                                     };
                                     let msg_value = cur_frame.expr_values.pop_front().unwrap();
                                     let deref_msg_value = self.store.maybe_read_ref(&msg_value).clone();
                                     if ctx.performed_put(port_id) {
                                         // We're fine, deallocate in case the expression value stack
                                         // held an owned value
                                         self.store.drop_value(msg_value.get_heap_pos());
                                     } else {
                                         // Prepare to execute again
                                         cur_frame.expr_values.push_front(msg_value);
                                         cur_frame.expr_values.push_front(port_value);
                                         cur_frame.expr_stack.push_back(ExprInstruction::EvalExpr(expr_id));
                                         let value_group = ValueGroup::from_store(&self.store, &[deref_msg_value]);
                                         return Ok(EvalContinuation::Put(port_id, value_group));
+                                    }
                                 },
                                 Method::Fires => {
                                     let port_value = cur_frame.expr_values.pop_front().unwrap();
                                     let port_value_deref = self.store.maybe_read_ref(&port_value).clone();
                                     let port_id = port_value_deref.as_port_id();
                                     match ctx.fires(port_id) {
                                         None => {
                                             cur_frame.expr_values.push_front(port_value);
                                             cur_frame.expr_stack.push_back(ExprInstruction::EvalExpr(expr_id));
                                             return Ok(EvalContinuation::BlockFires(port_id));
                                         },
                                         Some(value) => {
                                             cur_frame.expr_values.push_back(value);
+                                        }
+                                    }
                                 },
                                 Method::Create => {
                                     let length_value = cur_frame.expr_values.pop_front().unwrap();
                                     let length_value = self.store.maybe_read_ref(&length_value);
                                     let length = if length_value.is_signed_integer() {
                                         let length_value = length_value.as_signed_integer();
                                         if length_value < 0 {
                                             return Err(EvalError::new_error_at_expr(
                                                 self, modules, heap, expr_id,
                                                 format!("got length '{}', can only create a message with a non-negative length", length_value)
                                             ));
+                                        }
                                         length_value as u64
                                     } else {
                                         debug_assert!(length_value.is_unsigned_integer());
                                         length_value.as_unsigned_integer()
                                     };
                                     let heap_pos = self.store.alloc_heap();
                                     let values = &mut self.store.heap_regions[heap_pos as usize].values;
                                     debug_assert!(values.is_empty());
                                     values.resize(length as usize, Value::UInt8(0));
                                     cur_frame.expr_values.push_back(Value::Message(heap_pos));
                                 },
                                 Method::Length => {
                                     let value = cur_frame.expr_values.pop_front().unwrap();
                                     let value_heap_pos = value.get_heap_pos();
                                     let value = self.store.maybe_read_ref(&value);
                                     let heap_pos = match value {
                                         Value::Array(pos) => *pos,
                                         Value::String(pos) => *pos,
                                         _ => unreachable!("length(...) on {:?}", value),
                                     };
                                     let len = self.store.heap_regions[heap_pos as usize].values.len();
                                     // TODO: @PtrInt
                                     cur_frame.expr_values.push_back(Value::UInt32(len as u32));
                                     self.store.drop_value(value_heap_pos);
                                 },
                                 Method::Assert => {
                                     let value = cur_frame.expr_values.pop_front().unwrap();
                                     let value = self.store.maybe_read_ref(&value).clone();
                                     if !value.as_bool() {
                                         return Ok(EvalContinuation::BranchInconsistent)
+                                    }
                                 },
                                 Method::Print => {
                                     // Convert the runtime-variant of a string
                                     // into an actual string.
                                     let value = cur_frame.expr_values.pop_front().unwrap();
                                     let value_heap_pos = value.as_string();
                                     let elements = &self.store.heap_regions[value_heap_pos as usize].values;
                                     let mut message = String::with_capacity(elements.len());
                                     for element in elements {
                                         message.push(element.as_char());
+                                    }
                                     // Drop the heap-allocated value from the
                                     // store
                                     self.store.drop_heap_pos(value_heap_pos);
                                     println!("{}", message);
                                 },
                                 Method::SelectStart => {
                                     let num_cases = self.store.maybe_read_ref(&cur_frame.expr_values.pop_front().unwrap()).as_uint32();
                                     let num_ports = self.store.maybe_read_ref(&cur_frame.expr_values.pop_front().unwrap()).as_uint32();
                                     return Ok(EvalContinuation::SelectStart(num_cases, num_ports));
                                 },
                                 Method::SelectRegisterCasePort => {
                                     let case_index = self.store.maybe_read_ref(&cur_frame.expr_values.pop_front().unwrap()).as_uint32();
                                     let port_index = self.store.maybe_read_ref(&cur_frame.expr_values.pop_front().unwrap()).as_uint32();
                                     let port_value = self.store.maybe_read_ref(&cur_frame.expr_values.pop_front().unwrap()).as_port_id();
                                     return Ok(EvalContinuation::SelectRegisterPort(case_index, port_index, port_value));
                                 },
                                 Method::SelectWait => {
                                     match ctx.performed_select_wait() {
                                         Some(select_index) => {
                                             cur_frame.expr_values.push_back(Value::UInt32(select_index));
                                         },
                                         None => {
                                             cur_frame.expr_stack.push_back(ExprInstruction::EvalExpr(expr.this.upcast()));
                                             return Ok(EvalContinuation::SelectWait)
                                         },
+                                    }
                                 },
                                 Method::ComponentRandomU32 => {
                                     debug_assert_eq!(heap[expr.procedure].parameters.len(), cur_frame.expr_values.len());
                                     debug_assert_eq!(heap[cur_frame.position].as_new().expression, expr.this);
                                 },
                                 Method::UserComponent => {
                                     // This is actually handled by the evaluation
                                     // of the statement.
                                     debug_assert_eq!(heap[expr.procedure].parameters.len(), cur_frame.expr_values.len());
                                     debug_assert_eq!(heap[cur_frame.position].as_new().expression, expr.this)
+                                    debug_assert_eq!(heap[cur_frame.position].as_new().expression, expr.this);
                                 },
                                 Method::UserFunction => {
                                     // Push a new frame. Note that all expressions have
                                     // been pushed to the front, so they're in the order
                                     // of the definition.
                                     let num_args = expr.arguments.len();
                                     // Determine stack boundaries
                                     let cur_stack_boundary = self.store.cur_stack_boundary;
                                     let new_stack_boundary = self.store.stack.len();
                                     // Push new boundary and function arguments for new frame
                                     self.store.stack.push(Value::PrevStackBoundary(cur_stack_boundary as isize));
                                     for _ in 0..num_args {
                                         let argument = self.store.read_take_ownership(cur_frame.expr_values.pop_front().unwrap());
                                         self.store.stack.push(argument);
+                                    }
                                     // Determine the monomorph index of the function we're calling
                                     let mono_data = &heap[cur_frame.definition].monomorphs[cur_frame.monomorph_index];
                                     let (type_id, monomorph_index) = mono_data.expr_info[expr.type_index as usize].variant.as_procedure();
                                     // Push the new frame and reserve its stack size
                                     let new_frame = Frame::new(heap, expr.procedure, type_id, monomorph_index);
                                     let new_stack_size = new_frame.max_stack_size;
                                     self.frames.push(new_frame);
                                     self.store.cur_stack_boundary = new_stack_boundary;
                                     self.store.reserve_stack(new_stack_size);
                                     // To simplify the logic a little bit we will now
                                     // return and ask our caller to call us again
                                     return Ok(EvalContinuation::Stepping);
+                                }
+                            }
                         },
                         Expression::Variable(expr) => {
                             let variable = &heap[expr.declaration.unwrap()];
                             let ref_value = if expr.used_as_binding_target {
                                 Value::Binding(variable.unique_id_in_scope as StackPos)
                             } else {
                                 Value::Ref(ValueId::Stack(variable.unique_id_in_scope as StackPos))
                             };
                             cur_frame.expr_values.push_back(ref_value);
+                        }
+                    }
+                }
+            }
+        }
         debug_log!("Frame [{:?}] at {:?}", cur_frame.definition, cur_frame.position);
         if debug_enabled!() {
             debug_log!("Expression value stack (size = {}):", cur_frame.expr_values.len());
             for (_stack_idx, _stack_val) in cur_frame.expr_values.iter().enumerate() {
                 debug_log!("  [{:03}] {:?}", _stack_idx, _stack_val);
+            }
             debug_log!("Stack (size = {}):", self.store.stack.len());
             for (_stack_idx, _stack_val) in self.store.stack.iter().enumerate() {
                 debug_log!("  [{:03}] {:?}", _stack_idx, _stack_val);
+            }
             debug_log!("Heap:");
             for (_heap_idx, _heap_region) in self.store.heap_regions.iter().enumerate() {
                 let _is_free = self.store.free_regions.iter().any(|idx| *idx as usize == _heap_idx);
                 debug_log!("  [{:03}] in_use: {}, len: {}, vals: {:?}", _heap_idx, !_is_free, _heap_region.values.len(), &_heap_region.values);
+            }
+        }
         // No (more) expressions to evaluate. So evaluate statement (that may
         // depend on the result on the last evaluated expression(s))
         let stmt = &heap[cur_frame.position];
         let return_value = match stmt {
             Statement::Block(stmt) => {
                 debug_assert!(stmt.statements.is_empty() || stmt.next == stmt.statements[0]);
                 cur_frame.position = stmt.next;
                 Ok(EvalContinuation::Stepping)
             },
             Statement::EndBlock(stmt) => {
                 let block = &heap[stmt.start_block];
                 let scope = &heap[block.scope];
                 self.store.clear_stack(scope.first_unique_id_in_scope as usize);
                 cur_frame.position = stmt.next;
                 Ok(EvalContinuation::Stepping)
             },
             Statement::Local(stmt) => {
                 match stmt {
                     LocalStatement::Memory(stmt) => {
                         dbg_code!({
                             let variable = &heap[stmt.variable];
                             debug_assert!(match self.store.read_ref(ValueId::Stack(variable.unique_id_in_scope as u32)) {
                                 Value::Unassigned => false,
                                 _ => true,
                             });
                         });
                         cur_frame.position = stmt.next;
                         Ok(EvalContinuation::Stepping)
                     },
                     LocalStatement::Channel(stmt) => {
                         // Need to create a new channel by requesting it from
                         // the runtime.
                         match ctx.created_channel() {
                             None => {
                                 // No channel is pending. So request one
                                     Ok(EvalContinuation::NewChannel)
                             },
                             Some((put_port, get_port)) => {
                                 self.store.write(ValueId::Stack(heap[stmt.from].unique_id_in_scope as u32), put_port);
                                 self.store.write(ValueId::Stack(heap[stmt.to].unique_id_in_scope as u32), get_port);
                                 cur_frame.position = stmt.next;
                                 Ok(EvalContinuation::Stepping)
+                            }
+                        }
+                    }
+                }
             },
             Statement::Labeled(stmt) => {
                 cur_frame.position = stmt.body;
                 Ok(EvalContinuation::Stepping)
             },
             Statement::If(stmt) => {
                 debug_assert_eq!(cur_frame.expr_values.len(), 1, "expected one expr value for if statement");
                 let test_value = cur_frame.expr_values.pop_back().unwrap();
                 let test_value = self.store.maybe_read_ref(&test_value).as_bool();
                 if test_value {
                     cur_frame.position = stmt.true_case.body;
                 } else if let Some(false_body) = stmt.false_case {
                     cur_frame.position = false_body.body;
                 } else {
                     // Not true, and no false body
                     cur_frame.position = stmt.end_if.upcast();
+                }
                 Ok(EvalContinuation::Stepping)
             },
             Statement::EndIf(stmt) => {
                 cur_frame.position = stmt.next;
                 let if_stmt = &heap[stmt.start_if];
                 debug_assert_eq!(
                     heap[if_stmt.true_case.scope].first_unique_id_in_scope,
                     heap[if_stmt.false_case.unwrap_or(if_stmt.true_case).scope].first_unique_id_in_scope,
                 );
                 let scope = &heap[if_stmt.true_case.scope];
                 self.store.clear_stack(scope.first_unique_id_in_scope as usize);
                 Ok(EvalContinuation::Stepping)
             },
             Statement::While(stmt) => {
                 debug_assert_eq!(cur_frame.expr_values.len(), 1, "expected one expr value for while statement");
                 let test_value = cur_frame.expr_values.pop_back().unwrap();
                 let test_value = self.store.maybe_read_ref(&test_value).as_bool();
                 if test_value {
                     cur_frame.position = stmt.body;
                 } else {
                     cur_frame.position = stmt.end_while.upcast();
+                }
                 Ok(EvalContinuation::Stepping)
             },
             Statement::EndWhile(stmt) => {
                 cur_frame.position = stmt.next;
                 let start_while = &heap[stmt.start_while];
                 let scope = &heap[start_while.scope];
                 self.store.clear_stack(scope.first_unique_id_in_scope as usize);
                 Ok(EvalContinuation::Stepping)
             },
             Statement::Break(stmt) => {
                 cur_frame.position = stmt.target.upcast();
                 Ok(EvalContinuation::Stepping)
             },
             Statement::Continue(stmt) => {
                 cur_frame.position = stmt.target.upcast();
                 Ok(EvalContinuation::Stepping)
             },
             Statement::Synchronous(stmt) => {
                 cur_frame.position = stmt.body;
                 Ok(EvalContinuation::SyncBlockStart)
             },
             Statement::EndSynchronous(stmt) => {
                 cur_frame.position = stmt.next;
                 let start_synchronous = &heap[stmt.start_sync];
                 let scope = &heap[start_synchronous.scope];
                 self.store.clear_stack(scope.first_unique_id_in_scope as usize);
                 Ok(EvalContinuation::SyncBlockEnd)
             },
             Statement::Fork(stmt) => {
                 if stmt.right_body.is_none() {
                     // No reason to fork

src/protocol/parser/mod.rs

➞

Show inline comments

@@ @@ -107,287 +107,289 @@ impl TargetArch { @@
+    }
+}
 pub struct PassCtx<'a> {
     heap: &'a mut Heap,
     symbols: &'a mut SymbolTable,
     pool: &'a mut StringPool,
     arch: &'a TargetArch,
+}
 pub struct Parser {
     // Storage of all information created/gathered during compilation.
     pub(crate) heap: Heap,
     pub(crate) string_pool: StringPool, // Do not deallocate, holds all strings
     pub(crate) modules: Vec<Module>,
     pub(crate) symbol_table: SymbolTable,
     pub(crate) type_table: TypeTable,
     pub(crate) global_module_index: usize, // contains globals, implicitly imported everywhere
     // Compiler passes, used as little state machine that keep their memory
     // around.
     pass_tokenizer: PassTokenizer,
     pass_symbols: PassSymbols,
     pass_import: PassImport,
     pass_definitions: PassDefinitions,
     pass_validation: PassValidationLinking,
     pass_typing: PassTyping,
     pass_rewriting: PassRewriting,
     pass_stack_size: PassStackSize,
     // Compiler options
     pub write_tokens_to: Option<String>,
     pub write_ast_to: Option<String>,
     pub(crate) arch: TargetArch,
+}
 impl Parser {
     pub fn new() -> Result<Self, String> {
         let mut parser = Parser{
             heap: Heap::new(),
             string_pool: StringPool::new(),
             modules: Vec::new(),
             symbol_table: SymbolTable::new(),
             type_table: TypeTable::new(),
             global_module_index: 0,
             pass_tokenizer: PassTokenizer::new(),
             pass_symbols: PassSymbols::new(),
             pass_import: PassImport::new(),
             pass_definitions: PassDefinitions::new(),
             pass_validation: PassValidationLinking::new(),
             pass_typing: PassTyping::new(),
             pass_rewriting: PassRewriting::new(),
             pass_stack_size: PassStackSize::new(),
             write_tokens_to: None,
             write_ast_to: None,
             arch: TargetArch::new(),
         };
         parser.symbol_table.insert_scope(None, SymbolScope::Global);
         // Insert builtin types
         // TODO: At some point use correct values for size/alignment
         parser.arch.void_type_id    = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Void], false, 0, 1);
         parser.arch.message_type_id = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Message], false, 24, 8);
         parser.arch.bool_type_id    = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Bool], false, 1, 1);
         parser.arch.uint8_type_id   = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::UInt8], false, 1, 1);
         parser.arch.uint16_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::UInt16], false, 2, 2);
         parser.arch.uint32_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::UInt32], false, 4, 4);
         parser.arch.uint64_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::UInt64], false, 8, 8);
         parser.arch.sint8_type_id   = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::SInt8], false, 1, 1);
         parser.arch.sint16_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::SInt16], false, 2, 2);
         parser.arch.sint32_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::SInt32], false, 4, 4);
         parser.arch.sint64_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::SInt64], false, 8, 8);
         parser.arch.char_type_id    = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Character], false, 4, 4);
         parser.arch.string_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::String], false, 24, 8);
         parser.arch.array_type_id   = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Array, ConcreteTypePart::Void], true, 24, 8);
         parser.arch.slice_type_id   = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Slice, ConcreteTypePart::Void], true, 16, 4);
         parser.arch.input_type_id   = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Input, ConcreteTypePart::Void], true, 8, 8);
         parser.arch.output_type_id  = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Output, ConcreteTypePart::Void], true, 8, 8);
         parser.arch.pointer_type_id = insert_builtin_type(&mut parser.type_table, vec![ConcreteTypePart::Pointer, ConcreteTypePart::Void], true, 8, 8);
         // Parse standard library
         parser.feed_standard_library()?;
         return Ok(parser)
+    }
     /// Feeds a new InputSource to the parser, which will tokenize it and store
     /// it internally for later parsing (when all modules are present). Returns
     /// the index of the new module.
     pub fn feed(&mut self, mut source: InputSource) -> Result<usize, ParseError> {
         return self.feed_internal(source, false);
+    }
     pub fn parse(&mut self) -> Result<(), ParseError> {
         let mut pass_ctx = PassCtx{
             heap: &mut self.heap,
             symbols: &mut self.symbol_table,
             pool: &mut self.string_pool,
             arch: &self.arch,
         };
         // Advance all modules to the phase where all symbols are scanned
         for module_idx in 0..self.modules.len() {
             self.pass_symbols.parse(&mut self.modules, module_idx, &mut pass_ctx)?;
+        }
         // With all symbols scanned, perform further compilation until we can
         // add all base types to the type table.
         for module_idx in 0..self.modules.len() {
             self.pass_import.parse(&mut self.modules, module_idx, &mut pass_ctx)?;
             self.pass_definitions.parse(&mut self.modules, module_idx, &mut pass_ctx)?;
+        }
         if let Some(filename) = &self.write_tokens_to {
             let mut writer = TokenWriter::new();
             let mut file = std::fs::File::create(std::path::Path::new(filename)).unwrap();
             writer.write(&mut file, &self.modules);
+        }
         // Add every known type to the type table
         self.type_table.build_base_types(&mut self.modules, &mut pass_ctx)?;
         // Continue compilation with the remaining phases now that the types
         // are all in the type table
         for module_idx in 0..self.modules.len() {
             let mut ctx = visitor::Ctx{
                 heap: &mut self.heap,
                 modules: &mut self.modules,
                 module_idx,
                 symbols: &mut self.symbol_table,
                 types: &mut self.type_table,
                 arch: &self.arch,
             };
             self.pass_validation.visit_module(&mut ctx)?;
+        }
         // Perform typechecking on all modules
         let mut queue = ResolveQueue::new();
         for module_idx in 0..self.modules.len() {
             let mut ctx = visitor::Ctx{
                 heap: &mut self.heap,
                 modules: &mut self.modules,
                 module_idx,
                 symbols: &mut self.symbol_table,
                 types: &mut self.type_table,
                 arch: &self.arch,
             };
             self.pass_typing.queue_module_definitions(&mut ctx, &mut queue);
         };
         while !queue.is_empty() {
             let top = queue.pop_front().unwrap();
             let mut ctx = visitor::Ctx{
                 heap: &mut self.heap,
                 modules: &mut self.modules,
                 module_idx: top.root_id.index as usize,
                 symbols: &mut self.symbol_table,
                 types: &mut self.type_table,
                 arch: &self.arch,
             };
             self.pass_typing.handle_module_definition(&mut ctx, &mut queue, top)?;
+        }
         // Rewrite nodes in tree, then prepare for execution of code
         for module_idx in 0..self.modules.len() {
             self.modules[module_idx].phase = ModuleCompilationPhase::Typed;
             let mut ctx = visitor::Ctx{
                 heap: &mut self.heap,
                 modules: &mut self.modules,
                 module_idx,
                 symbols: &mut self.symbol_table,
                 types: &mut self.type_table,
                 arch: &self.arch,
             };
             self.pass_rewriting.visit_module(&mut ctx)?;
             self.pass_stack_size.visit_module(&mut ctx)?;
+        }
         // Write out desired information
         if let Some(filename) = &self.write_ast_to {
             let mut writer = ASTWriter::new();
             let mut file = std::fs::File::create(std::path::Path::new(filename)).unwrap();
             writer.write_ast(&mut file, &self.heap);
+        }
         Ok(())
+    }
     /// Tries to find the standard library and add the files for parsing.
     fn feed_standard_library(&mut self) -> Result<(), String> {
         use std::env;
         use std::path::{Path, PathBuf};
         use std::fs;
-        const FILES: [&'static str; 1] = [
+        const FILES: [&'static str; 2] = [
             "std.global.pdl",
             "std.random.pdl",
         ];
         // Determine base directory
         let (base_path, from_env) = if let Ok(path) = env::var(REOWOLF_PATH_ENV) {
             // Path variable is set
             (path, true)
         } else {
             let mut path = String::with_capacity(REOWOLF_PATH_DIR.len() + 2);
             path.push_str("./");
             path.push_str(REOWOLF_PATH_DIR);
             (path, false)
         };
         // Make sure directory exists
         let path = Path::new(&base_path);
         if !path.exists() {
             return Err(format!("std lib root directory '{}' does not exist", base_path));
+        }
         // Try to load all standard library files. We might need a more unified
         // way to do this in the future (i.e. a "std" package, containing all
         // of the modules)
         let mut file_path = PathBuf::new();
         let mut first_file = true;
         for file in FILES {
             file_path.clear();
             file_path.push(path);
             file_path.push(file);
             let source = fs::read(file_path.as_path());
             if let Err(err) = source {
                 return Err(format!(
                     "failed to read std lib file '{}' in root directory '{}', because: {}",
                     file, base_path, err
                 ));
+            }
             let source = source.unwrap();
             let input_source = InputSource::new(file.to_string(), source);
             let module_index = self.feed_internal(input_source, true);
             if let Err(err) = module_index {
                 // A bit of a hack, but shouldn't really happen anyway: the
                 // compiler should ship with a decent standard library (at some
                 // point)
                 return Err(format!("{}", err));
+            }
             let module_index = module_index.unwrap();
             if first_file {
                 self.global_module_index = module_index;
                 first_file = false;
+            }
+        }
         return Ok(())
+    }
     fn feed_internal(&mut self, mut source: InputSource, is_compiler_file: bool) -> Result<usize, ParseError> {
         let mut token_buffer = TokenBuffer::new();
         self.pass_tokenizer.tokenize(&mut source, &mut token_buffer)?;
         let module = Module{
             source,
             tokens: token_buffer,
             is_compiler_file,
             root_id: RootId::new_invalid(),
             name: None,
             version: None,
             phase: ModuleCompilationPhase::Tokenized,
         };
         let module_index = self.modules.len();
         self.modules.push(module);
         return Ok(module_index);
+    }
+}
 fn insert_builtin_type(type_table: &mut TypeTable, parts: Vec<ConcreteTypePart>, has_poly_var: bool, size: usize, alignment: usize) -> TypeId {
     const POLY_VARS: [PolymorphicVariable; 1] = [PolymorphicVariable{
         identifier: Identifier::new_empty(InputSpan::new()),
         is_in_use: false,
     }];
     let concrete_type = ConcreteType{ parts };
     let poly_var = if has_poly_var {
         POLY_VARS.as_slice()
     } else {
         &[]
     };
     return type_table.add_builtin_data_type(concrete_type, poly_var, size, alignment);
+}
@@ \ No newline at end of file @@

src/protocol/parser/pass_definitions.rs

➞

Show inline comments

@@ @@ -187,384 +187,385 @@ impl PassDefinitions { @@
         Ok(())
+    }
     fn visit_union_definition(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<(), ParseError> {
         consume_exact_ident(&module.source, iter, KW_UNION)?;
         let (ident_text, _) = consume_ident(&module.source, iter)?;
         // Retrieve preallocated DefinitionId
         let module_scope = SymbolScope::Module(module.root_id);
         let definition_id = ctx.symbols.get_symbol_by_name_defined_in_scope(module_scope, ident_text)
             .unwrap().variant.as_definition().definition_id;
         self.cur_definition = definition_id;
         // Parse union definition
         consume_polymorphic_vars_spilled(&module.source, iter, ctx)?;
         let mut variants_section = self.union_variants.start_section();
         consume_comma_separated(
             TokenKind::OpenCurly, TokenKind::CloseCurly, &module.source, iter, ctx,
             |source, iter, ctx| {
                 let identifier = consume_ident_interned(source, iter, ctx)?;
                 let mut close_pos = identifier.span.end;
                 let mut types_section = self.parser_types.start_section();
                 let has_embedded = maybe_consume_comma_separated(
                     TokenKind::OpenParen, TokenKind::CloseParen, source, iter, ctx,
                     |source, iter, ctx| {
                         let poly_vars = ctx.heap[definition_id].poly_vars();
                         self.type_parser.consume_parser_type(
                             iter, &ctx.heap, source, &ctx.symbols, poly_vars, definition_id,
                             module_scope, false, false, None
+                        )
                     },
                     &mut types_section, "an embedded type", Some(&mut close_pos)
                 )?;
                 let value = if has_embedded {
                     types_section.into_vec()
                 } else {
                     types_section.forget();
                     Vec::new()
                 };
                 Ok(UnionVariantDefinition{
                     span: InputSpan::from_positions(identifier.span.begin, close_pos),
                     identifier,
                     value
                 })
             },
             &mut variants_section, "a union variant", "a list of union variants", None
         )?;
         // Transfer to AST
         let union_def = ctx.heap[definition_id].as_union_mut();
         union_def.variants = variants_section.into_vec();
         Ok(())
+    }
     fn visit_function_definition(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<(), ParseError> {
         // Retrieve function name
         consume_exact_ident(&module.source, iter, KW_FUNCTION)?;
         let (ident_text, _) = consume_ident(&module.source, iter)?;
         // Retrieve preallocated DefinitionId
         let module_scope = SymbolScope::Module(module.root_id);
         let definition_id = ctx.symbols.get_symbol_by_name_defined_in_scope(module_scope, ident_text)
             .unwrap().variant.as_definition().definition_id;
         self.cur_definition = definition_id;
         let allow_compiler_types = module.is_compiler_file;
         consume_polymorphic_vars_spilled(&module.source, iter, ctx)?;
         // Parse function's argument list
         let mut parameter_section = self.variables.start_section();
         consume_parameter_list(
             &mut self.type_parser, &module.source, iter, ctx, &mut parameter_section,
             module_scope, definition_id, allow_compiler_types
         )?;
         let parameters = parameter_section.into_vec();
         // Consume return types
         consume_token(&module.source, iter, TokenKind::ArrowRight)?;
         let poly_vars = ctx.heap[definition_id].poly_vars();
         let parser_type = self.type_parser.consume_parser_type(
             iter, &ctx.heap, &module.source, &ctx.symbols, poly_vars, definition_id,
             module_scope, false, allow_compiler_types, None
         )?;
         // Consume body
         let (body_id, source) = self.consume_procedure_body(module, iter, ctx, definition_id, ProcedureKind::Function)?;
         let scope_id = ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::Definition(definition_id)));
         // Assign everything in the preallocated AST node
         let function = ctx.heap[definition_id].as_procedure_mut();
         function.source = source;
         function.return_type = Some(parser_type);
         function.parameters = parameters;
         function.scope = scope_id;
         function.body = body_id;
         Ok(())
+    }
     fn visit_component_definition(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<(), ParseError> {
         // Consume component variant and name
         let (_variant_text, _) = consume_any_ident(&module.source, iter)?;
         debug_assert!(_variant_text == KW_PRIMITIVE || _variant_text == KW_COMPOSITE);
         let (ident_text, _) = consume_ident(&module.source, iter)?;
         // Retrieve preallocated definition
         let module_scope = SymbolScope::Module(module.root_id);
         let definition_id = ctx.symbols.get_symbol_by_name_defined_in_scope(module_scope, ident_text)
             .unwrap().variant.as_definition().definition_id;
         self.cur_definition = definition_id;
         let allow_compiler_types = module.is_compiler_file;
         consume_polymorphic_vars_spilled(&module.source, iter, ctx)?;
         // Parse component's argument list
         let mut parameter_section = self.variables.start_section();
         consume_parameter_list(
             &mut self.type_parser, &module.source, iter, ctx, &mut parameter_section,
             module_scope, definition_id, allow_compiler_types
         )?;
         let parameters = parameter_section.into_vec();
         // Consume body
         let procedure_kind = ctx.heap[definition_id].as_procedure().kind;
         let (body_id, source) = self.consume_procedure_body(module, iter, ctx, definition_id, procedure_kind)?;
         let scope_id = ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::Definition(definition_id)));
         // Assign everything in the AST node
         let component = ctx.heap[definition_id].as_procedure_mut();
         debug_assert!(component.return_type.is_none());
         component.source = source;
         component.parameters = parameters;
         component.scope = scope_id;
         component.body = body_id;
         Ok(())
+    }
     /// Consumes a procedure's body: either a user-defined procedure, which we
     /// parse as normal, or a builtin function, where we'll make sure we expect
     /// the particular builtin.
     ///
     /// We expect that the procedure's name is already stored in the
     /// preallocated AST node.
     fn consume_procedure_body(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx, definition_id: DefinitionId, kind: ProcedureKind
     ) -> Result<(BlockStatementId, ProcedureSource), ParseError> {
         if iter.next() == Some(TokenKind::OpenCurly) && iter.peek() == Some(TokenKind::Pragma) {
             // Consume the placeholder "{ #builtin }" tokens
             iter.consume(); // opening curly brace
             let (pragma, pragma_span) = consume_pragma(&module.source, iter)?;
             if pragma != b"#builtin" {
                 return Err(ParseError::new_error_str_at_span(
                     &module.source, pragma_span,
                     "expected a '#builtin' pragma, or a function body"
                 ));
+            }
             if iter.next() != Some(TokenKind::CloseCurly) {
                 // Just to keep the compiler writers in line ;)
                 panic!("compiler error: when using the #builtin pragma, wrap it in curly braces");
+            }
             iter.consume();
             // Retrieve module and procedure name
             assert!(module.name.is_some(), "compiler error: builtin procedure body in unnamed module");
             let (_, module_name) = module.name.as_ref().unwrap();
             let module_name = module_name.as_str();
             let definition = ctx.heap[definition_id].as_procedure();
             let procedure_name = definition.identifier.value.as_str();
             let source = match (module_name, procedure_name) {
                 ("std.global", "get") => ProcedureSource::FuncGet,
                 ("std.global", "put") => ProcedureSource::FuncPut,
                 ("std.global", "fires") => ProcedureSource::FuncFires,
                 ("std.global", "create") => ProcedureSource::FuncCreate,
                 ("std.global", "length") => ProcedureSource::FuncLength,
                 ("std.global", "assert") => ProcedureSource::FuncAssert,
                 ("std.global", "print") => ProcedureSource::FuncPrint,
                 ("std.random", "random_u32") => ProcedureSource::CompRandomU32,
                 _ => panic!(
                     "compiler error: unknown builtin procedure '{}' in module '{}'",
                     procedure_name, module_name
                 ),
             };
             return Ok((BlockStatementId::new_invalid(), source));
         } else {
             let body_id = self.consume_block_statement(module, iter, ctx)?;
             let source = match kind {
                 ProcedureKind::Function =>
                     ProcedureSource::FuncUserDefined,
                 ProcedureKind::Primitive | ProcedureKind::Composite =>
                     ProcedureSource::CompUserDefined,
             };
             return Ok((body_id, source))
+        }
+    }
     /// Consumes a statement and returns a boolean indicating whether it was a
     /// block or not.
     fn consume_statement(&mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx) -> Result<StatementId, ParseError> {
         let next = iter.next().expect("consume_statement has a next token");
         if next == TokenKind::OpenCurly {
             let id = self.consume_block_statement(module, iter, ctx)?;
             return Ok(id.upcast());
         } else if next == TokenKind::Ident {
             let ident = peek_ident(&module.source, iter).unwrap();
             if ident == KW_STMT_IF {
                 // Consume if statement and place end-if statement directly
                 // after it.
                 let id = self.consume_if_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_WHILE {
                 let id = self.consume_while_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_BREAK {
                 let id = self.consume_break_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_CONTINUE {
                 let id = self.consume_continue_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_SYNC {
                 let id = self.consume_synchronous_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_FORK {
                 let id = self.consume_fork_statement(module, iter, ctx)?;
                 let end_fork = ctx.heap.alloc_end_fork_statement(|this| EndForkStatement {
                     this,
                     start_fork: id,
                     next: StatementId::new_invalid(),
                 });
                 let fork_stmt = &mut ctx.heap[id];
                 fork_stmt.end_fork = end_fork;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_SELECT {
                 let id = self.consume_select_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_RETURN {
                 let id = self.consume_return_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_GOTO {
                 let id = self.consume_goto_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_NEW {
                 let id = self.consume_new_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else if ident == KW_STMT_CHANNEL {
                 let id = self.consume_channel_statement(module, iter, ctx)?;
                 return Ok(id.upcast().upcast());
             } else if iter.peek() == Some(TokenKind::Colon) {
                 let id = self.consume_labeled_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
             } else {
                 // Two fallback possibilities: the first one is a memory
                 // declaration, the other one is to parse it as a normal
                 // expression. This is a bit ugly.
                 if let Some(memory_stmt_id) = self.maybe_consume_memory_statement_without_semicolon(module, iter, ctx)? {
                     consume_token(&module.source, iter, TokenKind::SemiColon)?;
                     return Ok(memory_stmt_id.upcast().upcast());
                 } else {
                     let id = self.consume_expression_statement(module, iter, ctx)?;
                     return Ok(id.upcast());
+                }
+            }
         } else if next == TokenKind::OpenParen {
             // Same as above: memory statement or normal expression
             if let Some(memory_stmt_id) = self.maybe_consume_memory_statement_without_semicolon(module, iter, ctx)? {
                 consume_token(&module.source, iter, TokenKind::SemiColon)?;
                 return Ok(memory_stmt_id.upcast().upcast());
             } else {
                 let id = self.consume_expression_statement(module, iter, ctx)?;
                 return Ok(id.upcast());
+            }
         } else {
             let id = self.consume_expression_statement(module, iter, ctx)?;
             return Ok(id.upcast());
+        }
+    }
     fn consume_block_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<BlockStatementId, ParseError> {
         let open_curly_span = consume_token(&module.source, iter, TokenKind::OpenCurly)?;
         let mut stmt_section = self.statements.start_section();
         let mut next = iter.next();
         while next != Some(TokenKind::CloseCurly) {
             if next.is_none() {
                 return Err(ParseError::new_error_str_at_pos(
                     &module.source, iter.last_valid_pos(), "expected a statement or '}'"
                 ));
+            }
             let stmt_id = self.consume_statement(module, iter, ctx)?;
             stmt_section.push(stmt_id);
             next = iter.next();
+        }
         let statements = stmt_section.into_vec();
         let mut block_span = consume_token(&module.source, iter, TokenKind::CloseCurly)?;
         block_span.begin = open_curly_span.begin;
         let block_id = ctx.heap.alloc_block_statement(|this| BlockStatement{
             this,
             span: block_span,
             statements,
             end_block: EndBlockStatementId::new_invalid(),
             scope: ScopeId::new_invalid(),
             next: StatementId::new_invalid(),
         });
         let scope_id = ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::Block(block_id)));
         let end_block_id = ctx.heap.alloc_end_block_statement(|this| EndBlockStatement{
             this, start_block: block_id, next: StatementId::new_invalid()
         });
         let block_stmt = &mut ctx.heap[block_id];
         block_stmt.end_block = end_block_id;
         block_stmt.scope = scope_id;
         Ok(block_id)
+    }
     fn consume_if_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<IfStatementId, ParseError> {
         let if_span = consume_exact_ident(&module.source, iter, KW_STMT_IF)?;
         consume_token(&module.source, iter, TokenKind::OpenParen)?;
         let test = self.consume_expression(module, iter, ctx)?;
         consume_token(&module.source, iter, TokenKind::CloseParen)?;
         // Consume bodies of if-statement
         let true_body = IfStatementCase{
             body: self.consume_statement(module, iter, ctx)?,
             scope: ScopeId::new_invalid(),
         };
         let false_body = if has_ident(&module.source, iter, KW_STMT_ELSE) {
             iter.consume();
             let false_body = IfStatementCase{
                 body: self.consume_statement(module, iter, ctx)?,
                 scope: ScopeId::new_invalid(),
             };
             Some(false_body)
         } else {
             None
         };
         // Construct AST elements
         let if_stmt_id = ctx.heap.alloc_if_statement(|this| IfStatement{
             this,
             span: if_span,
             test,
             true_case: true_body,
             false_case: false_body,
             end_if: EndIfStatementId::new_invalid(),
         });
         let end_if_stmt_id = ctx.heap.alloc_end_if_statement(|this| EndIfStatement{
             this,
             start_if: if_stmt_id,
             next: StatementId::new_invalid(),
         });
         let true_scope_id = ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::If(if_stmt_id, true)));
         let false_scope_id = if false_body.is_some() {
             Some(ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::If(if_stmt_id, false))))
         } else {
@@ @@ -636,389 +637,387 @@ impl PassDefinitions { @@
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<ContinueStatementId, ParseError> {
         let continue_span = consume_exact_ident(&module.source, iter, KW_STMT_CONTINUE)?;
         let label=  if Some(TokenKind::Ident) == iter.next() {
             let label = consume_ident_interned(&module.source, iter, ctx)?;
             Some(label)
         } else {
             None
         };
         consume_token(&module.source, iter, TokenKind::SemiColon)?;
         Ok(ctx.heap.alloc_continue_statement(|this| ContinueStatement{
             this,
             span: continue_span,
             label,
             target: WhileStatementId::new_invalid(),
         }))
+    }
     fn consume_synchronous_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<SynchronousStatementId, ParseError> {
         let synchronous_span = consume_exact_ident(&module.source, iter, KW_STMT_SYNC)?;
         let body = self.consume_statement(module, iter, ctx)?;
         let sync_stmt_id = ctx.heap.alloc_synchronous_statement(|this| SynchronousStatement{
             this,
             span: synchronous_span,
             scope: ScopeId::new_invalid(),
             body,
             end_sync: EndSynchronousStatementId::new_invalid(),
         });
         let end_sync_stmt_id = ctx.heap.alloc_end_synchronous_statement(|this| EndSynchronousStatement{
             this,
             start_sync: sync_stmt_id,
             next: StatementId::new_invalid(),
         });
         let scope_id = ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::Synchronous(sync_stmt_id)));
         let sync_stmt = &mut ctx.heap[sync_stmt_id];
         sync_stmt.scope = scope_id;
         sync_stmt.end_sync = end_sync_stmt_id;
         return Ok(sync_stmt_id);
+    }
     fn consume_fork_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<ForkStatementId, ParseError> {
         let fork_span = consume_exact_ident(&module.source, iter, KW_STMT_FORK)?;
         let left_body = self.consume_statement(module, iter, ctx)?;
         let right_body = if has_ident(&module.source, iter, KW_STMT_OR) {
             iter.consume();
             let right_body = self.consume_statement(module, iter, ctx)?;
             Some(right_body)
         } else {
             None
         };
         Ok(ctx.heap.alloc_fork_statement(|this| ForkStatement{
             this,
             span: fork_span,
             left_body,
             right_body,
             end_fork: EndForkStatementId::new_invalid(),
         }))
+    }
     fn consume_select_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<SelectStatementId, ParseError> {
         let select_span = consume_exact_ident(&module.source, iter, KW_STMT_SELECT)?;
         consume_token(&module.source, iter, TokenKind::OpenCurly)?;
         let mut cases = Vec::new();
         let mut next = iter.next();
         while Some(TokenKind::CloseCurly) != next {
             let guard = match self.maybe_consume_memory_statement_without_semicolon(module, iter, ctx)? {
                 Some(guard_mem_stmt) => guard_mem_stmt.upcast().upcast(),
                 None => {
                     let start_pos = iter.last_valid_pos();
                     let expr = self.consume_expression(module, iter, ctx)?;
                     let end_pos = iter.last_valid_pos();
                     let guard_expr_stmt = ctx.heap.alloc_expression_statement(|this| ExpressionStatement{
                         this,
                         span: InputSpan::from_positions(start_pos, end_pos),
                         expression: expr,
                         next: StatementId::new_invalid(),
                     });
                     guard_expr_stmt.upcast()
                 },
             };
             consume_token(&module.source, iter, TokenKind::ArrowRight)?;
             let block = self.consume_statement(module, iter, ctx)?;
             cases.push(SelectCase{
                 guard,
                 body: block,
                 scope: ScopeId::new_invalid(),
                 involved_ports: Vec::with_capacity(1)
             });
             next = iter.next();
+        }
         consume_token(&module.source, iter, TokenKind::CloseCurly)?;
         let num_cases = cases.len();
         let select_stmt_id = ctx.heap.alloc_select_statement(|this| SelectStatement{
             this,
             span: select_span,
             cases,
             end_select: EndSelectStatementId::new_invalid(),
             relative_pos_in_parent: -1,
             next: StatementId::new_invalid(),
         });
         let end_select_stmt_id = ctx.heap.alloc_end_select_statement(|this| EndSelectStatement{
             this,
             start_select: select_stmt_id,
             next: StatementId::new_invalid(),
         });
         let select_stmt = &mut ctx.heap[select_stmt_id];
         select_stmt.end_select = end_select_stmt_id;
         for case_index in 0..num_cases {
             let scope_id = ctx.heap.alloc_scope(|this| Scope::new(this, ScopeAssociation::SelectCase(select_stmt_id, case_index as u32)));
             let select_stmt = &mut ctx.heap[select_stmt_id];
             let select_case = &mut select_stmt.cases[case_index];
             select_case.scope = scope_id;
+        }
         return Ok(select_stmt_id)
+    }
     fn consume_return_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<ReturnStatementId, ParseError> {
         let return_span = consume_exact_ident(&module.source, iter, KW_STMT_RETURN)?;
         let mut scoped_section = self.expressions.start_section();
         consume_comma_separated_until(
             TokenKind::SemiColon, &module.source, iter, ctx,
             |_source, iter, ctx| self.consume_expression(module, iter, ctx),
             &mut scoped_section, "an expression", None
         )?;
         let expressions = scoped_section.into_vec();
         if expressions.is_empty() {
             return Err(ParseError::new_error_str_at_span(&module.source, return_span, "expected at least one return value"));
         } else if expressions.len() > 1 {
             return Err(ParseError::new_error_str_at_span(&module.source, return_span, "multiple return values are not (yet) supported"))
+        }
         Ok(ctx.heap.alloc_return_statement(|this| ReturnStatement{
             this,
             span: return_span,
             expressions
         }))
+    }
     fn consume_goto_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<GotoStatementId, ParseError> {
         let goto_span = consume_exact_ident(&module.source, iter, KW_STMT_GOTO)?;
         let label = consume_ident_interned(&module.source, iter, ctx)?;
         consume_token(&module.source, iter, TokenKind::SemiColon)?;
         Ok(ctx.heap.alloc_goto_statement(|this| GotoStatement{
             this,
             span: goto_span,
             label,
             target: LabeledStatementId::new_invalid(),
         }))
+    }
     fn consume_new_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<NewStatementId, ParseError> {
         let new_span = consume_exact_ident(&module.source, iter, KW_STMT_NEW)?;
         let start_pos = iter.last_valid_pos();
         let expression_id = self.consume_primary_expression(module, iter, ctx)?;
         let expression = &ctx.heap[expression_id];
         let mut valid = false;
         let mut call_id = CallExpressionId::new_invalid();
         if let Expression::Call(expression) = expression {
             // Allow both components and functions, as it makes more sense to
             // check their correct use in the validation and linking pass
             if expression.method == Method::UserComponent || expression.method == Method::UserFunction {
             call_id = expression.this;
             valid = true;
+        }
+        }
         if !valid {
             return Err(ParseError::new_error_str_at_span(
                 &module.source, InputSpan::from_positions(start_pos, iter.last_valid_pos()), "expected a call expression"
             ));
+        }
         consume_token(&module.source, iter, TokenKind::SemiColon)?;
         debug_assert!(!call_id.is_invalid());
         Ok(ctx.heap.alloc_new_statement(|this| NewStatement{
             this,
             span: new_span,
             expression: call_id,
             next: StatementId::new_invalid(),
         }))
+    }
     fn consume_channel_statement(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<ChannelStatementId, ParseError> {
         // Consume channel specification
         let channel_span = consume_exact_ident(&module.source, iter, KW_STMT_CHANNEL)?;
         let (inner_port_type, end_pos) = if Some(TokenKind::OpenAngle) == iter.next() {
             // Retrieve the type of the channel, we're cheating a bit here by
             // consuming the first '<' and setting the initial angle depth to 1
             // such that our final '>' will be consumed as well.
             let angle_start_pos = iter.next_start_position();
             iter.consume();
             let definition_id = self.cur_definition;
             let poly_vars = ctx.heap[definition_id].poly_vars();
             let parser_type = self.type_parser.consume_parser_type(
                 iter, &ctx.heap, &module.source, &ctx.symbols, poly_vars,
                 definition_id, SymbolScope::Module(module.root_id),
                 true, false, Some(angle_start_pos)
             )?;
             (parser_type.elements, parser_type.full_span.end)
         } else {
             // Assume inferred
+            (
                 vec![ParserTypeElement{
                     element_span: channel_span,
                     variant: ParserTypeVariant::Inferred
                 }],
                 channel_span.end
+            )
         };
         let from_identifier = consume_ident_interned(&module.source, iter, ctx)?;
         consume_token(&module.source, iter, TokenKind::ArrowRight)?;
         let to_identifier = consume_ident_interned(&module.source, iter, ctx)?;
         consume_token(&module.source, iter, TokenKind::SemiColon)?;
         // Construct ports
         let port_type_span = InputSpan::from_positions(channel_span.begin, end_pos);
         let port_type_len = inner_port_type.len() + 1;
         let mut from_port_type = ParserType{ elements: Vec::with_capacity(port_type_len), full_span: port_type_span };
         from_port_type.elements.push(ParserTypeElement{
             element_span: channel_span,
             variant: ParserTypeVariant::Output,
         });
         from_port_type.elements.extend_from_slice(&inner_port_type);
         let from = ctx.heap.alloc_variable(|this| Variable{
             this,
             kind: VariableKind::Local,
             identifier: from_identifier,
             parser_type: from_port_type,
             relative_pos_in_parent: 0,
             unique_id_in_scope: -1,
         });
         let mut to_port_type = ParserType{ elements: Vec::with_capacity(port_type_len), full_span: port_type_span };
         to_port_type.elements.push(ParserTypeElement{
             element_span: channel_span,
             variant: ParserTypeVariant::Input
         });
         to_port_type.elements.extend_from_slice(&inner_port_type);
         let to = ctx.heap.alloc_variable(|this|Variable{
             this,
             kind: VariableKind::Local,
             identifier: to_identifier,
             parser_type: to_port_type,
             relative_pos_in_parent: 0,
             unique_id_in_scope: -1,
         });
         // Construct the channel
         Ok(ctx.heap.alloc_channel_statement(|this| ChannelStatement{
             this,
             span: channel_span,
             from, to,
             relative_pos_in_parent: 0,
             next: StatementId::new_invalid(),
         }))
+    }
     fn consume_labeled_statement(&mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx) -> Result<LabeledStatementId, ParseError> {
         let label = consume_ident_interned(&module.source, iter, ctx)?;
         consume_token(&module.source, iter, TokenKind::Colon)?;
         let inner_stmt_id = self.consume_statement(module, iter, ctx)?;
         let stmt_id = ctx.heap.alloc_labeled_statement(|this| LabeledStatement {
             this,
             label,
             body: inner_stmt_id,
             relative_pos_in_parent: 0,
             in_sync: SynchronousStatementId::new_invalid(),
         });
         return Ok(stmt_id);
+    }
     /// Attempts to consume a memory statement (a statement along the lines of
     /// `type var_name = initial_expr`). Will return `Ok(None)` if it didn't
     /// seem like there was a memory statement, `Ok(Some(...))` if there was
     /// one, and `Err(...)` if its reasonable to assume that there was a memory
     /// statement, but we failed to parse it.
     fn maybe_consume_memory_statement_without_semicolon(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx
     ) -> Result<Option<MemoryStatementId>, ParseError> {
         // This is a bit ugly. It would be nicer if we could somehow
         // consume the expression with a type hint if we do get a valid
         // type, but we don't get an identifier following it
         let iter_state = iter.save();
         let definition_id = self.cur_definition;
         let poly_vars = ctx.heap[definition_id].poly_vars();
         let parser_type = self.type_parser.consume_parser_type(
             iter, &ctx.heap, &module.source, &ctx.symbols, poly_vars,
             definition_id, SymbolScope::Definition(definition_id),
             true, false, None
         );
         if let Ok(parser_type) = parser_type {
             if Some(TokenKind::Ident) == iter.next() {
                 // Assume this is a proper memory statement
                 let identifier = consume_ident_interned(&module.source, iter, ctx)?;
                 let memory_span = InputSpan::from_positions(parser_type.full_span.begin, identifier.span.end);
                 let assign_span = consume_token(&module.source, iter, TokenKind::Equal)?;
                 let initial_expr_id = self.consume_expression(module, iter, ctx)?;
                 let initial_expr_end_pos = iter.last_valid_pos();
                 // Create the AST variable
                 let local_id = ctx.heap.alloc_variable(|this| Variable{
                     this,
                     kind: VariableKind::Local,
                     identifier: identifier.clone(),
                     parser_type,
                     relative_pos_in_parent: 0,
                     unique_id_in_scope: -1,
                 });
                 // Create the initial assignment expression
                 // Note: we set the initial variable declaration here
                 let variable_expr_id = ctx.heap.alloc_variable_expression(|this| VariableExpression{
                     this,
                     identifier,
                     declaration: Some(local_id),
                     used_as_binding_target: false,
                     parent: ExpressionParent::None,
                     type_index: -1,
                 });
                 let assignment_expr_id = ctx.heap.alloc_assignment_expression(|this| AssignmentExpression{
                     this,
                     operator_span: assign_span,
                     full_span: InputSpan::from_positions(memory_span.begin, initial_expr_end_pos),
                     left: variable_expr_id.upcast(),
                     operation: AssignmentOperator::Set,
                     right: initial_expr_id,
                     parent: ExpressionParent::None,
                     type_index: -1,
                 });
                 // Put both together in the memory statement
                 let memory_stmt_id = ctx.heap.alloc_memory_statement(|this| MemoryStatement{
                     this,
                     span: memory_span,
                     variable: local_id,
                     initial_expr: assignment_expr_id,
                     next: StatementId::new_invalid()
                 });
                 return Ok(Some(memory_stmt_id));
+            }
+        }
         // If here then one of the preconditions for a memory statement was not
         // met. So recover the iterator and return
         iter.load(iter_state);
         Ok(None)
+    }
@@ @@ -1469,385 +1468,386 @@ impl PassDefinitions { @@
                 literal_id.upcast()
             } else {
                 // Start by consuming one expression, then check for a comma
                 let expr_id = self.consume_expression(module, iter, ctx)?;
                 if Some(TokenKind::Comma) == iter.next() && Some(TokenKind::CloseParen) != iter.peek() {
                     // Must be an N-tuple
                     iter.consume(); // the comma
                     let mut scoped_section = self.expressions.start_section();
                     scoped_section.push(expr_id);
                     let mut close_paren_pos = open_paren_pos;
                     consume_comma_separated_until(
                         TokenKind::CloseParen, &module.source, iter, ctx,
                         |_source, iter, ctx| self.consume_expression(module, iter, ctx),
                         &mut scoped_section, "an expression", Some(&mut close_paren_pos)
                     )?;
                     debug_assert!(scoped_section.len() > 1); // peeked token wasn't CloseParen, must be expression
                     let literal_id = ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                         this,
                         span: InputSpan::from_positions(open_paren_pos, close_paren_pos),
                         value: Literal::Tuple(scoped_section.into_vec()),
                         parent: ExpressionParent::None,
                         type_index: -1,
                     });
                     literal_id.upcast()
                 } else {
                     // Assume we're dealing with a normal expression
                     consume_token(&module.source, iter, TokenKind::CloseParen)?;
                     expr_id
+                }
             };
             result
         } else if next == Some(TokenKind::OpenCurly) {
             // Array literal
             let (start_pos, mut end_pos) = iter.next_positions();
             let mut scoped_section = self.expressions.start_section();
             consume_comma_separated(
                 TokenKind::OpenCurly, TokenKind::CloseCurly, &module.source, iter, ctx,
                 |_source, iter, ctx| self.consume_expression(module, iter, ctx),
                 &mut scoped_section, "an expression", "a list of expressions", Some(&mut end_pos)
             )?;
             ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                 this,
                 span: InputSpan::from_positions(start_pos, end_pos),
                 value: Literal::Array(scoped_section.into_vec()),
                 parent: ExpressionParent::None,
                 type_index: -1,
             }).upcast()
         } else if next == Some(TokenKind::Integer) {
             let (literal, span) = consume_integer_literal(&module.source, iter, &mut self.buffer)?;
             ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                 this, span,
                 value: Literal::Integer(LiteralInteger{ unsigned_value: literal, negated: false }),
                 parent: ExpressionParent::None,
                 type_index: -1,
             }).upcast()
         } else if next == Some(TokenKind::String) {
             let span = consume_string_literal(&module.source, iter, &mut self.buffer)?;
             let interned = ctx.pool.intern(self.buffer.as_bytes());
             ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                 this, span,
                 value: Literal::String(interned),
                 parent: ExpressionParent::None,
                 type_index: -1,
             }).upcast()
         } else if next == Some(TokenKind::Character) {
             let (character, span) = consume_character_literal(&module.source, iter)?;
             ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                 this, span,
                 value: Literal::Character(character),
                 parent: ExpressionParent::None,
                 type_index: -1,
             }).upcast()
         } else if next == Some(TokenKind::Ident) {
             // May be a variable, a type instantiation or a function call. If we
             // have a single identifier that we cannot find in the type table
             // then we're going to assume that we're dealing with a variable.
             let ident_span = iter.next_span();
             let ident_text = module.source.section_at_span(ident_span);
             let symbol = ctx.symbols.get_symbol_by_name(SymbolScope::Module(module.root_id), ident_text);
             if symbol.is_some() {
                 // The first bit looked like a symbol, so we're going to follow
                 // that all the way through, assume we arrive at some kind of
                 // function call or type instantiation
                 use ParserTypeVariant as PTV;
                 let symbol_scope = SymbolScope::Definition(self.cur_definition);
                 let poly_vars = ctx.heap[self.cur_definition].poly_vars();
                 let parser_type = self.type_parser.consume_parser_type(
                     iter, &ctx.heap, &module.source, &ctx.symbols, poly_vars, self.cur_definition,
                     symbol_scope, true, false, None
                 )?;
                 debug_assert!(!parser_type.elements.is_empty());
                 match parser_type.elements[0].variant {
                     PTV::Definition(target_definition_id, _) => {
                         let definition = &ctx.heap[target_definition_id];
                         match definition {
                             Definition::Struct(_) => {
                                 // Struct literal
                                 let mut last_token = iter.last_valid_pos();
                                 let mut struct_fields = Vec::new();
                                 consume_comma_separated(
                                     TokenKind::OpenCurly, TokenKind::CloseCurly, &module.source, iter, ctx,
                                     |source, iter, ctx| {
                                         let identifier = consume_ident_interned(source, iter, ctx)?;
                                         consume_token(source, iter, TokenKind::Colon)?;
                                         let value = self.consume_expression(module, iter, ctx)?;
                                         Ok(LiteralStructField{ identifier, value, field_idx: 0 })
                                     },
                                     &mut struct_fields, "a struct field", "a list of struct fields", Some(&mut last_token)
                                 )?;
                                 ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                                     this,
                                     span: InputSpan::from_positions(ident_span.begin, last_token),
                                     value: Literal::Struct(LiteralStruct{
                                         parser_type,
                                         fields: struct_fields,
                                         definition: target_definition_id,
                                     }),
                                     parent: ExpressionParent::None,
                                     type_index: -1,
                                 }).upcast()
                             },
                             Definition::Enum(_) => {
                                 // Enum literal: consume the variant
                                 consume_token(&module.source, iter, TokenKind::ColonColon)?;
                                 let variant = consume_ident_interned(&module.source, iter, ctx)?;
                                 ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                                     this,
                                     span: InputSpan::from_positions(ident_span.begin, variant.span.end),
                                     value: Literal::Enum(LiteralEnum{
                                         parser_type,
                                         variant,
                                         definition: target_definition_id,
                                         variant_idx: 0
                                     }),
                                     parent: ExpressionParent::None,
                                     type_index: -1,
                                 }).upcast()
                             },
                             Definition::Union(_) => {
                                 // Union literal: consume the variant
                                 consume_token(&module.source, iter, TokenKind::ColonColon)?;
                                 let variant = consume_ident_interned(&module.source, iter, ctx)?;
                                 // Consume any possible embedded values
                                 let mut end_pos = variant.span.end;
                                 let values = if Some(TokenKind::OpenParen) == iter.next() {
                                     self.consume_expression_list(module, iter, ctx, Some(&mut end_pos))?
                                 } else {
                                     Vec::new()
                                 };
                                 ctx.heap.alloc_literal_expression(|this| LiteralExpression{
                                     this,
                                     span: InputSpan::from_positions(ident_span.begin, end_pos),
                                     value: Literal::Union(LiteralUnion{
                                         parser_type, variant, values,
                                         definition: target_definition_id,
                                         variant_idx: 0,
                                     }),
                                     parent: ExpressionParent::None,
                                     type_index: -1,
                                 }).upcast()
                             },
                             Definition::Procedure(proc_def) => {
                                 // Check whether it is a builtin function
                                 // TODO: Once we start generating bytecode this is unnecessary
                                 let procedure_id = proc_def.this;
                                 let method = match proc_def.source {
                                     ProcedureSource::FuncUserDefined => Method::UserFunction,
                                     ProcedureSource::CompUserDefined => Method::UserComponent,
                                     ProcedureSource::FuncGet => Method::Get,
                                     ProcedureSource::FuncPut => Method::Put,
                                     ProcedureSource::FuncFires => Method::Fires,
                                     ProcedureSource::FuncCreate => Method::Create,
                                     ProcedureSource::FuncLength => Method::Length,
                                     ProcedureSource::FuncAssert => Method::Assert,
                                     ProcedureSource::FuncPrint => Method::Print,
                                     _ => todo!("other proc sources")
                                     ProcedureSource::CompRandomU32 => Method::ComponentRandomU32,
                                     _ => todo!("other procedure sources"),
                                 };
                                 // Function call: consume the arguments
                                 let func_span = parser_type.full_span;
                                 let mut full_span = func_span;
                                 let arguments = self.consume_expression_list(
                                     module, iter, ctx, Some(&mut full_span.end)
                                 )?;
                                 ctx.heap.alloc_call_expression(|this| CallExpression{
                                     this, func_span, full_span, parser_type, method, arguments,
                                     procedure: procedure_id,
                                     parent: ExpressionParent::None,
                                     type_index: -1,
                                 }).upcast()
+                            }
+                        }
                     },
                     _ => {
                         return Err(ParseError::new_error_str_at_span(
                             &module.source, parser_type.full_span, "unexpected type in expression"
                         ))
+                    }
+                }
             } else {
                 // Check for builtin keywords or builtin functions
                 if ident_text == KW_LIT_NULL || ident_text == KW_LIT_TRUE || ident_text == KW_LIT_FALSE {
                     iter.consume();
                     // Parse builtin literal
                     let value = match ident_text {
                         KW_LIT_NULL => Literal::Null,
                         KW_LIT_TRUE => Literal::True,
                         KW_LIT_FALSE => Literal::False,
                         _ => unreachable!(),
                     };
                     ctx.heap.alloc_literal_expression(|this| LiteralExpression {
                         this,
                         span: ident_span,
                         value,
                         parent: ExpressionParent::None,
                         type_index: -1,
                     }).upcast()
                 } else if ident_text == KW_LET {
                     // Binding expression
                     let operator_span = iter.next_span();
                     iter.consume();
                     let bound_to = self.consume_prefix_expression(module, iter, ctx)?;
                     consume_token(&module.source, iter, TokenKind::Equal)?;
                     let bound_from = self.consume_prefix_expression(module, iter, ctx)?;
                     let full_span = InputSpan::from_positions(
                         operator_span.begin, ctx.heap[bound_from].full_span().end,
                     );
                     ctx.heap.alloc_binding_expression(|this| BindingExpression{
                         this, operator_span, full_span, bound_to, bound_from,
                         parent: ExpressionParent::None,
                         type_index: -1,
                     }).upcast()
                 } else if ident_text == KW_CAST {
                     // Casting expression
                     iter.consume();
                     let to_type = if Some(TokenKind::OpenAngle) == iter.next() {
                         let angle_start_pos = iter.next_start_position();
                         iter.consume();
                         let definition_id = self.cur_definition;
                         let poly_vars = ctx.heap[definition_id].poly_vars();
                         self.type_parser.consume_parser_type(
                             iter, &ctx.heap, &module.source, &ctx.symbols,
                             poly_vars, definition_id, SymbolScope::Module(module.root_id),
                             true, false, Some(angle_start_pos)
                         )?
                     } else {
                         // Automatic casting with inferred target type
                         ParserType{
                             elements: vec![ParserTypeElement{
                                 element_span: ident_span,
                                 variant: ParserTypeVariant::Inferred,
                             }],
                             full_span: ident_span
+                        }
                     };
                     consume_token(&module.source, iter, TokenKind::OpenParen)?;
                     let subject = self.consume_expression(module, iter, ctx)?;
                     let mut full_span = iter.next_span();
                     full_span.begin = to_type.full_span.begin;
                     consume_token(&module.source, iter, TokenKind::CloseParen)?;
                     ctx.heap.alloc_cast_expression(|this| CastExpression{
                         this,
                         cast_span: to_type.full_span,
                         full_span, to_type, subject,
                         parent: ExpressionParent::None,
                         type_index: -1,
                     }).upcast()
                 } else {
                     // Not a builtin literal, but also not a known type. So we
                     // assume it is a variable expression. Although if we do,
                     // then if a programmer mistyped a struct/function name the
                     // error messages will be rather cryptic. For polymorphic
                     // arguments we can't really do anything at all (because it
                     // uses the '<' token). In the other cases we try to provide
                     // a better error message.
                     iter.consume();
                     let next = iter.next();
                     if Some(TokenKind::ColonColon) == next {
                         return Err(ParseError::new_error_str_at_span(&module.source, ident_span, "unknown identifier"));
                     } else if Some(TokenKind::OpenParen) == next {
                         return Err(ParseError::new_error_str_at_span(
                             &module.source, ident_span,
                             "unknown identifier, did you mistype a union variant's, component's, or function's name?"
                         ));
                     } else if Some(TokenKind::OpenCurly) == next {
                         return Err(ParseError::new_error_str_at_span(
                             &module.source, ident_span,
                             "unknown identifier, did you mistype a struct type's name?"
                         ))
+                    }
                     let ident_text = ctx.pool.intern(ident_text);
                     let identifier = Identifier { span: ident_span, value: ident_text };
                     ctx.heap.alloc_variable_expression(|this| VariableExpression {
                         this,
                         identifier,
                         declaration: None,
                         used_as_binding_target: false,
                         parent: ExpressionParent::None,
                         type_index: -1,
                     }).upcast()
+                }
+            }
         } else {
             return Err(ParseError::new_error_str_at_pos(
                 &module.source, iter.last_valid_pos(), "expected an expression"
             ));
         };
         Ok(result)
+    }
     //--------------------------------------------------------------------------
     // Expression Utilities
     //--------------------------------------------------------------------------
     #[inline]
     fn consume_generic_binary_expression<
         M: Fn(Option<TokenKind>) -> Option<BinaryOperator>,
         F: Fn(&mut PassDefinitions, &Module, &mut TokenIter, &mut PassCtx) -> Result<ExpressionId, ParseError>
     >(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx, match_fn: M, higher_precedence_fn: F
     ) -> Result<ExpressionId, ParseError> {
         let mut result = higher_precedence_fn(self, module, iter, ctx)?;
         while let Some(operation) = match_fn(iter.next()) {
             let operator_span = iter.next_span();
             iter.consume();
             let left = result;
             let right = higher_precedence_fn(self, module, iter, ctx)?;
             let full_span = InputSpan::from_positions(
                 ctx.heap[left].full_span().begin,
                 ctx.heap[right].full_span().end,
             );
             result = ctx.heap.alloc_binary_expression(|this| BinaryExpression{
                 this, operator_span, full_span, left, operation, right,
                 parent: ExpressionParent::None,
                 type_index: -1,
             }).upcast();
+        }
         Ok(result)
+    }
     #[inline]
     fn consume_expression_list(
         &mut self, module: &Module, iter: &mut TokenIter, ctx: &mut PassCtx, end_pos: Option<&mut InputPosition>
     ) -> Result<Vec<ExpressionId>, ParseError> {
         let mut section = self.expressions.start_section();
         consume_comma_separated(
             TokenKind::OpenParen, TokenKind::CloseParen, &module.source, iter, ctx,
             |_source, iter, ctx| self.consume_expression(module, iter, ctx),
             &mut section, "an expression", "a list of expressions", end_pos
         )?;
         Ok(section.into_vec())
+    }
+}

src/protocol/parser/pass_validation_linking.rs

➞

Show inline comments

@@ @@ -971,384 +971,387 @@ impl Visitor for PassValidationLinking { @@
+                }
                 // Need to traverse fields expressions in struct and evaluate
                 // the poly args
                 let mut expr_section = self.expression_buffer.start_section();
                 for field in &literal.fields {
                     expr_section.push(field.value);
+                }
                 for expr_idx in 0..expr_section.len() {
                     let expr_id = expr_section[expr_idx];
                     self.expr_parent = ExpressionParent::Expression(upcast_id, expr_idx as u32);
                     self.visit_expr(ctx, expr_id)?;
+                }
                 expr_section.forget();
             },
             Literal::Enum(literal) => {
                 // Make sure the variant exists
                 let type_definition = ctx.types.get_base_definition(&literal.definition).unwrap();
                 let enum_definition = type_definition.definition.as_enum();
                 let variant_idx = enum_definition.variants.iter().position(|v| {
                     v.identifier == literal.variant
                 });
                 if variant_idx.is_none() {
                     let literal = ctx.heap[id].value.as_enum();
                     let ast_definition = ctx.heap[literal.definition].as_enum();
                     return Err(ParseError::new_error_at_span(
                         &ctx.module().source, literal.parser_type.full_span, format!(
                             "the variant '{}' does not exist on the enum '{}'",
                             literal.variant.value.as_str(), ast_definition.identifier.value.as_str()
+                        )
                     ));
+                }
                 literal.variant_idx = variant_idx.unwrap();
             },
             Literal::Union(literal) => {
                 // Make sure the variant exists
                 let type_definition = ctx.types.get_base_definition(&literal.definition).unwrap();
                 let union_definition = type_definition.definition.as_union();
                 let variant_idx = union_definition.variants.iter().position(|v| {
                     v.identifier == literal.variant
                 });
                 if variant_idx.is_none() {
                     let literal = ctx.heap[id].value.as_union();
                     let ast_definition = ctx.heap[literal.definition].as_union();
                     return Err(ParseError::new_error_at_span(
                         &ctx.module().source, literal.parser_type.full_span, format!(
                             "the variant '{}' does not exist on the union '{}'",
                             literal.variant.value.as_str(), ast_definition.identifier.value.as_str()
+                        )
                     ));
+                }
                 literal.variant_idx = variant_idx.unwrap();
                 // Make sure the number of specified values matches the expected
                 // number of embedded values in the union variant.
                 let union_variant = &union_definition.variants[literal.variant_idx];
                 if union_variant.embedded.len() != literal.values.len() {
                     let literal = ctx.heap[id].value.as_union();
                     let ast_definition = ctx.heap[literal.definition].as_union();
                     return Err(ParseError::new_error_at_span(
                         &ctx.module().source, literal.parser_type.full_span, format!(
                             "The variant '{}' of union '{}' expects {} embedded values, but {} were specified",
                             literal.variant.value.as_str(), ast_definition.identifier.value.as_str(),
                             union_variant.embedded.len(), literal.values.len()
                         ),
                     ))
+                }
                 // Traverse embedded values of union (if any) and evaluate the
                 // polymorphic arguments
                 let upcast_id = id.upcast();
                 let mut expr_section = self.expression_buffer.start_section();
                 for value in &literal.values {
                     expr_section.push(*value);
+                }
                 for expr_idx in 0..expr_section.len() {
                     let expr_id = expr_section[expr_idx];
                     self.expr_parent = ExpressionParent::Expression(upcast_id, expr_idx as u32);
                     self.visit_expr(ctx, expr_id)?;
+                }
                 expr_section.forget();
             },
             Literal::Array(literal) | Literal::Tuple(literal) => {
                 // Visit all expressions in the array
                 let upcast_id = id.upcast();
                 let expr_section = self.expression_buffer.start_section_initialized(literal);
                 for expr_idx in 0..expr_section.len() {
                     let expr_id = expr_section[expr_idx];
                     self.expr_parent = ExpressionParent::Expression(upcast_id, expr_idx as u32);
                     self.visit_expr(ctx, expr_id)?;
+                }
                 expr_section.forget();
+            }
+        }
         self.expr_parent = old_expr_parent;
         Ok(())
+    }
     fn visit_cast_expr(&mut self, ctx: &mut Ctx, id: CastExpressionId) -> VisitorResult {
         let cast_expr = &mut ctx.heap[id];
         if let Some(span) = self.must_be_assignable {
             return Err(ParseError::new_error_str_at_span(
                 &ctx.module().source, span, "cannot assign to the result from a cast expression"
             ))
+        }
         let upcast_id = id.upcast();
         let old_expr_parent = self.expr_parent;
         cast_expr.parent = old_expr_parent;
         // Recurse into the thing that we're casting
         self.expr_parent = ExpressionParent::Expression(upcast_id, 0);
         let subject_id = cast_expr.subject;
         self.visit_expr(ctx, subject_id)?;
         self.expr_parent = old_expr_parent;
         Ok(())
+    }
     fn visit_call_expr(&mut self, ctx: &mut Ctx, id: CallExpressionId) -> VisitorResult {
         let call_expr = &ctx.heap[id];
         if let Some(span) = self.must_be_assignable {
             return Err(ParseError::new_error_str_at_span(
                 &ctx.module().source, span, "cannot assign to the result from a call expression"
             ))
+        }
         // Check whether the method is allowed to be called within the code's
         // context (in sync, definition type, etc.)
         let mut expecting_wrapping_new_stmt = false;
         let mut expecting_primitive_def = false;
         let mut expecting_wrapping_sync_stmt = false;
         let mut expecting_no_select_stmt = false;
         match call_expr.method {
             Method::Get => {
                 expecting_primitive_def = true;
                 expecting_wrapping_sync_stmt = true;
                 if !self.in_select_guard.is_invalid() {
                     // In a select guard. Take the argument (i.e. the port we're
                     // retrieving from) and add it to the list of involved ports
                     // of the guard
                     if call_expr.arguments.len() == 1 {
                         // We're checking the number of arguments later, for now
                         // assume it is correct.
                         let argument = call_expr.arguments[0];
                         let select_stmt = &mut ctx.heap[self.in_select_guard];
                         let select_case = &mut select_stmt.cases[self.in_select_arm as usize];
                         select_case.involved_ports.push((id, argument));
+                    }
+                }
             },
             Method::Put => {
                 expecting_primitive_def = true;
                 expecting_wrapping_sync_stmt = true;
                 expecting_no_select_stmt = true;
             },
             Method::Fires => {
                 expecting_primitive_def = true;
                 expecting_wrapping_sync_stmt = true;
             },
             Method::Create => {},
             Method::Length => {},
             Method::Assert => {
                 expecting_wrapping_sync_stmt = true;
                 expecting_no_select_stmt = true;
                 if self.proc_kind == ProcedureKind::Function {
                     let call_span = call_expr.func_span;
                     return Err(ParseError::new_error_str_at_span(
                         &ctx.module().source, call_span,
                         "assert statement may only occur in components"
                     ));
+                }
             },
             Method::Print => {},
             Method::SelectStart
             | Method::SelectRegisterCasePort
             | Method::SelectWait => unreachable!(), // not usable by programmer directly
             Method::ComponentRandomU32 => {
                 expecting_wrapping_new_stmt = true;
             },
             Method::UserFunction => {}
             Method::UserComponent => {
                 expecting_wrapping_new_stmt = true;
             },
+        }
         let call_expr = &mut ctx.heap[id];
         fn get_span_and_name<'a>(ctx: &'a Ctx, id: CallExpressionId) -> (InputSpan, String) {
             let call = &ctx.heap[id];
             let span = call.func_span;
             let name = String::from_utf8_lossy(ctx.module().source.section_at_span(span)).to_string();
             return (span, name);
+        }
         if expecting_primitive_def {
             if self.proc_kind != ProcedureKind::Primitive {
                 let (call_span, func_name) = get_span_and_name(ctx, id);
                 return Err(ParseError::new_error_at_span(
                     &ctx.module().source, call_span,
                     format!("a call to '{}' may only occur in primitive component definitions", func_name)
                 ));
+            }
+        }
         if expecting_wrapping_sync_stmt {
             if self.in_sync.is_invalid() {
                 let (call_span, func_name) = get_span_and_name(ctx, id);
                 return Err(ParseError::new_error_at_span(
                     &ctx.module().source, call_span,
                     format!("a call to '{}' may only occur inside synchronous blocks", func_name)
                 ))
+            }
+        }
         if expecting_no_select_stmt {
             if !self.in_select_guard.is_invalid() {
                 let (call_span, func_name) = get_span_and_name(ctx, id);
                 return Err(ParseError::new_error_at_span(
                     &ctx.module().source, call_span,
                     format!("a call to '{}' may not occur in a select statement's guard", func_name)
                 ));
+            }
+        }
         if expecting_wrapping_new_stmt {
             if !self.expr_parent.is_new() {
                 let call_span = call_expr.func_span;
                 return Err(ParseError::new_error_str_at_span(
                     &ctx.module().source, call_span,
                     "cannot call a component, it can only be instantiated by using 'new'"
                 ));
+            }
         } else {
             if self.expr_parent.is_new() {
                 let call_span = call_expr.func_span;
                 return Err(ParseError::new_error_str_at_span(
                     &ctx.module().source, call_span,
                     "only components can be instantiated, this is a function"
                 ));
+            }
+        }
         // Check the number of arguments
         let call_definition = ctx.types.get_base_definition(&call_expr.procedure.upcast()).unwrap();
         let num_expected_args = match &call_definition.definition {
             DefinedTypeVariant::Procedure(definition) => definition.arguments.len(),
             _ => unreachable!(),
         };
         let num_provided_args = call_expr.arguments.len();
         if num_provided_args != num_expected_args {
             let argument_text = if num_expected_args == 1 { "argument" } else { "arguments" };
             let call_span = call_expr.full_span;
             return Err(ParseError::new_error_at_span(
                 &ctx.module().source, call_span, format!(
                     "expected {} {}, but {} were provided",
                     num_expected_args, argument_text, num_provided_args
+                )
             ));
+        }
         // Recurse into all of the arguments and set the expression's parent
         let upcast_id = id.upcast();
         let section = self.expression_buffer.start_section_initialized(&call_expr.arguments);
         let old_expr_parent = self.expr_parent;
         call_expr.parent = old_expr_parent;
         for arg_expr_idx in 0..section.len() {
             let arg_expr_id = section[arg_expr_idx];
             self.expr_parent = ExpressionParent::Expression(upcast_id, arg_expr_idx as u32);
             self.visit_expr(ctx, arg_expr_id)?;
+        }
         section.forget();
         self.expr_parent = old_expr_parent;
         Ok(())
+    }
     fn visit_variable_expr(&mut self, ctx: &mut Ctx, id: VariableExpressionId) -> VisitorResult {
         let var_expr = &ctx.heap[id];
         // Check if declaration was already resolved (this occurs for the
         // variable expr that is on the LHS of the assignment expr that is
         // associated with a variable declaration)
         let mut variable_id = var_expr.declaration;
         let mut is_binding_target = false;
         // Otherwise try to find it
         if variable_id.is_none() {
             variable_id = self.find_variable(ctx, self.relative_pos_in_parent, &var_expr.identifier);
+        }
         // Otherwise try to see if is a variable introduced by a binding expr
         let variable_id = if let Some(variable_id) = variable_id {
             variable_id
         } else {
             if self.in_binding_expr.is_invalid() || !self.in_binding_expr_lhs {
                 return Err(ParseError::new_error_str_at_span(
                     &ctx.module().source, var_expr.identifier.span, "unresolved variable"
                 ));
+            }
             // This is a binding variable, but it may only appear in very
             // specific locations.
             let is_valid_binding = match self.expr_parent {
                 ExpressionParent::Expression(expr_id, idx) => {
                     match &ctx.heap[expr_id] {
                         Expression::Binding(_binding_expr) => {
                             // Nested binding is disallowed, and because of
                             // the check above we know we're directly at the
                             // LHS of the binding expression
                             debug_assert_eq!(_binding_expr.this, self.in_binding_expr);
                             debug_assert_eq!(idx, 0);
                             true
+                        }
                         Expression::Literal(_lit_expr) => {
                             // Only struct, unions, tuples and arrays can
                             // have subexpressions, so we're always fine
                             dbg_code!({
                                 match _lit_expr.value {
                                     Literal::Struct(_) | Literal::Union(_) | Literal::Array(_) | Literal::Tuple(_) => {},
                                     _ => unreachable!(),
+                                }
                             });
                             true
                         },
                         _ => false,
+                    }
                 },
                 _ => {
                     false
+                }
             };
             if !is_valid_binding {
                 let binding_expr = &ctx.heap[self.in_binding_expr];
                 return Err(ParseError::new_error_str_at_span(
                     &ctx.module().source, var_expr.identifier.span,
                     "illegal location for binding variable: binding variables may only be nested under a binding expression, or a struct, union or array literal"
                 ).with_info_at_span(
                     &ctx.module().source, binding_expr.operator_span, format!(
                         "'{}' was interpreted as a binding variable because the variable is not declared and it is nested under this binding expression",
                         var_expr.identifier.value.as_str()
+                    )
                 ));
+            }
             // By now we know that this is a valid binding expression. Given
             // that a binding expression must be nested under an if/while
             // statement, we now add the variable to the scope associated with
             // that statement.
             let bound_identifier = var_expr.identifier.clone();
             let bound_variable_id = ctx.heap.alloc_variable(|this| Variable {
                 this,
                 kind: VariableKind::Binding,
                 parser_type: ParserType {
                     elements: vec![ParserTypeElement {
                         element_span: bound_identifier.span,
                         variant: ParserTypeVariant::Inferred
                     }],
                     full_span: bound_identifier.span
                 },
                 identifier: bound_identifier,
                 relative_pos_in_parent: 0,
                 unique_id_in_scope: -1,
             });
             let scope_id = match &ctx.heap[self.in_test_expr] {
                 Statement::If(stmt) => stmt.true_case.scope,

src/protocol/parser/type_table.rs

➞

Show inline comments

@@ @@ -1856,384 +1856,385 @@ impl TypeTable { @@
                         max_alignment = max_alignment.max(variant_alignment);
+                    }
                     mono_type.size = max_size;
                     mono_type.alignment = max_alignment;
                     self.size_alignment_stack.truncate(breadcrumb.first_size_alignment_idx as usize);
                 },
                 MonoTypeVariant::Struct(mono_type) => {
                     // Retrieve size and alignment of each struct member. We'll
                     // compute the offsets once all of those are known
                     let num_fields = mono_type.fields.len() as u32;
                     while breadcrumb.next_member < num_fields {
                         let mono_field = &mono_type.fields[breadcrumb.next_member as usize];
                         let layout_result = Self::get_memory_layout_or_breadcrumb(
                             &self.definition_lookup, &self.mono_type_lookup, &self.mono_types,
                             &mut self.mono_search_key, arch, &mono_field.concrete_type.parts,
                             self.size_alignment_stack.len()
                         );
                         match layout_result {
                             MemoryLayoutResult::TypeExists(size, alignment) => {
                                 self.size_alignment_stack.push((size, alignment))
                             },
                             MemoryLayoutResult::PushBreadcrumb(new_breadcrumb) => {
                                 self.memory_layout_breadcrumbs[cur_breadcrumb_idx] = breadcrumb;
                                 self.memory_layout_breadcrumbs.push(new_breadcrumb);
                                 continue 'breadcrumb_loop;
                             },
+                        }
                         breadcrumb.next_member += 1;
+                    }
                     // Compute offsets and size of total type
                     let mut cur_offset = 0;
                     let mut max_alignment = 1;
                     let mono_type = &mut self.mono_types[breadcrumb.type_id.0 as usize];
                     let struct_type = mono_type.variant.as_struct_mut();
                     let mut size_alignment_idx = breadcrumb.first_size_alignment_idx as usize;
                     for field in &mut struct_type.fields {
                         let (size, alignment) = self.size_alignment_stack[size_alignment_idx];
                         field.size = size;
                         field.alignment = alignment;
                         size_alignment_idx += 1;
                         align_offset_to(&mut cur_offset, alignment);
                         field.offset = cur_offset;
                         cur_offset += size;
                         max_alignment = max_alignment.max(alignment);
+                    }
                     mono_type.size = cur_offset;
                     mono_type.alignment = max_alignment;
                     self.size_alignment_stack.truncate(breadcrumb.first_size_alignment_idx as usize);
                 },
                 MonoTypeVariant::Procedure(_) => {
                     unreachable!();
                 },
                 MonoTypeVariant::Tuple(mono_type) => {
                     let num_members = mono_type.members.len() as u32;
                     while breadcrumb.next_member < num_members {
                         let mono_member = &mono_type.members[breadcrumb.next_member as usize];
                         let layout_result = Self::get_memory_layout_or_breadcrumb(
                             &self.definition_lookup, &self.mono_type_lookup, &self.mono_types,
                             &mut self.mono_search_key, arch, &mono_member.concrete_type.parts,
                             self.size_alignment_stack.len()
                         );
                         match layout_result {
                             MemoryLayoutResult::TypeExists(size, alignment) => {
                                 self.size_alignment_stack.push((size, alignment));
                             },
                             MemoryLayoutResult::PushBreadcrumb(new_breadcrumb) => {
                                 self.memory_layout_breadcrumbs[cur_breadcrumb_idx] = breadcrumb;
                                 self.memory_layout_breadcrumbs.push(new_breadcrumb);
                                 continue 'breadcrumb_loop;
                             },
+                        }
                         breadcrumb.next_member += 1;
+                    }
                     // If here then we can compute the memory layout of the tuple.
                     let mut cur_offset = 0;
                     let mut max_alignment = 1;
                     let mono_type = &mut self.mono_types[breadcrumb.type_id.0 as usize];
                     let mono_tuple = mono_type.variant.as_tuple_mut();
                     let mut size_alignment_index = breadcrumb.first_size_alignment_idx as usize;
                     for member_index in 0..num_members {
                         let (member_size, member_alignment) = self.size_alignment_stack[size_alignment_index];
                         align_offset_to(&mut cur_offset, member_alignment);
                         size_alignment_index += 1;
                         let member = &mut mono_tuple.members[member_index as usize];
                         member.size = member_size;
                         member.alignment = member_alignment;
                         member.offset = cur_offset;
                         cur_offset += member_size;
                         max_alignment = max_alignment.max(member_alignment);
+                    }
                     mono_type.size = cur_offset;
                     mono_type.alignment = max_alignment;
                     self.size_alignment_stack.truncate(breadcrumb.first_size_alignment_idx as usize);
                 },
+            }
             // If here, then we completely layed out the current type. So move
             // to the next breadcrumb
             self.memory_layout_breadcrumbs.pop();
+        }
         debug_assert!(self.size_alignment_stack.is_empty());
         // If here then all types have been layed out. What remains is to
         // compute the sizes/alignment/offsets of the heap variants of the
         // unions we have encountered.
         for entry in &self.encountered_types {
             if !entry.is_union {
                 continue;
+            }
             // First pass, use buffer to store size/alignment to prevent
             // borrowing issues.
             let mono_type = self.mono_types[entry.type_id.0 as usize].variant.as_union();
             for variant in &mono_type.variants {
                 if !variant.lives_on_heap {
                     continue;
+                }
                 debug_assert!(!variant.embedded.is_empty());
                 for embedded in &variant.embedded {
                     let layout_result = Self::get_memory_layout_or_breadcrumb(
                         &self.definition_lookup, &self.mono_type_lookup, &self.mono_types,
                         &mut self.mono_search_key, arch, &embedded.concrete_type.parts,
                         self.size_alignment_stack.len()
                     );
                     match layout_result {
                         MemoryLayoutResult::TypeExists(size, alignment) => {
                             self.size_alignment_stack.push((size, alignment));
                         },
                         _ => unreachable!(), // type was not truly infinite, so type must have been found
+                    }
+                }
+            }
             // Second pass, apply the size/alignment values in our buffer
             let mono_type = self.mono_types[entry.type_id.0 as usize].variant.as_union_mut();
             let mut max_size = 0;
             let mut max_alignment = 1;
             let mut size_alignment_idx = 0;
             for variant in &mut mono_type.variants {
                 if !variant.lives_on_heap {
                     continue;
+                }
                 let mut variant_offset = 0;
                 let mut variant_alignment = 1;
                 for embedded in &mut variant.embedded {
                     let (size, alignment) = self.size_alignment_stack[size_alignment_idx];
                     embedded.size = size;
                     embedded.alignment = alignment;
                     size_alignment_idx += 1;
                     align_offset_to(&mut variant_offset, alignment);
                     embedded.alignment = variant_offset;
                     variant_offset += size;
                     variant_alignment = variant_alignment.max(alignment);
+                }
                 max_size = max_size.max(variant_offset);
                 max_alignment = max_alignment.max(variant_alignment);
+            }
             if max_size != 0 {
                 // At least one entry lives on the heap
                 mono_type.heap_size = max_size;
                 mono_type.heap_alignment = max_alignment;
+            }
+        }
         // And now, we're actually, properly, done
         self.encountered_types.clear();
         self.size_alignment_stack.clear();
+    }
     /// Attempts to compute size/alignment for the provided type. Note that this
     /// is called *after* type loops have been succesfully resolved. Hence we
     /// may assume that all monomorph entries exist, but we may not assume that
     /// those entries already have their size/alignment computed.
     // Passed parameters are messy. But need to strike balance between borrowing
     // and allocations in hot loops. So it is what it is.
     fn get_memory_layout_or_breadcrumb(
         definition_map: &DefinitionMap, mono_type_map: &MonoTypeMap, mono_types: &MonoTypeArray,
         search_key: &mut MonoSearchKey, arch: &TargetArch, parts: &[ConcreteTypePart],
         size_alignment_stack_len: usize,
     ) -> MemoryLayoutResult {
         use ConcreteTypePart as CTP;
         debug_assert!(!parts.is_empty());
         let type_id = match parts[0] {
             CTP::Void      => arch.void_type_id,
             CTP::Message   => arch.message_type_id,
             CTP::Bool      => arch.bool_type_id,
             CTP::UInt8     => arch.uint8_type_id,
             CTP::UInt16    => arch.uint16_type_id,
             CTP::UInt32    => arch.uint32_type_id,
             CTP::UInt64    => arch.uint64_type_id,
             CTP::SInt8     => arch.sint8_type_id,
             CTP::SInt16    => arch.sint16_type_id,
             CTP::SInt32    => arch.sint32_type_id,
             CTP::SInt64    => arch.sint64_type_id,
             CTP::Character => arch.char_type_id,
             CTP::String    => arch.string_type_id,
             CTP::Array     => arch.array_type_id,
             CTP::Slice     => arch.slice_type_id,
             CTP::Input     => arch.input_type_id,
             CTP::Output    => arch.output_type_id,
             CTP::Pointer   => arch.pointer_type_id,
             CTP::Tuple(_) => {
                 Self::set_search_key_to_tuple(search_key, definition_map, parts);
                 let type_id = mono_type_map.get(&search_key).copied().unwrap();
                 type_id
             },
             CTP::Instance(definition_id, _) => {
                 // Retrieve entry and the specific monomorph index by applying
                 // the full concrete type.
                 let definition_type = definition_map.get(&definition_id).unwrap();
                 search_key.set(parts, &definition_type.poly_vars);
                 let type_id = mono_type_map.get(&search_key).copied().unwrap();
                 type_id
             },
             CTP::Function(_, _) | CTP::Component(_, _) => {
                 todo!("storage for 'function pointers'");
+            }
         };
         let mono_type = &mono_types[type_id.0 as usize];
         if let Some((size, alignment)) = mono_type.get_size_alignment() {
             return MemoryLayoutResult::TypeExists(size, alignment);
         } else {
             return MemoryLayoutResult::PushBreadcrumb(MemoryBreadcrumb{
                 type_id,
                 next_member: 0,
                 next_embedded: 0,
                 first_size_alignment_idx: size_alignment_stack_len as u32,
             });
+        }
+    }
     /// Returns tag concrete type (always a builtin integer type), the size of
     /// that type in bytes (and implicitly, its alignment)
     fn variant_tag_type_from_values(min_val: i64, max_val: i64) -> (ConcreteType, usize) {
         debug_assert!(min_val <= max_val);
         let (part, size) = if min_val >= 0 {
             // Can be an unsigned integer
             if max_val <= (u8::MAX as i64) {
                 (ConcreteTypePart::UInt8, 1)
             } else if max_val <= (u16::MAX as i64) {
                 (ConcreteTypePart::UInt16, 2)
             } else if max_val <= (u32::MAX as i64) {
                 (ConcreteTypePart::UInt32, 4)
             } else {
                 (ConcreteTypePart::UInt64, 8)
+            }
         } else {
             // Must be a signed integer
             if min_val >= (i8::MIN as i64) && max_val <= (i8::MAX as i64) {
                 (ConcreteTypePart::SInt8, 1)
             } else if min_val >= (i16::MIN as i64) && max_val <= (i16::MAX as i64) {
                 (ConcreteTypePart::SInt16, 2)
             } else if min_val >= (i32::MIN as i64) && max_val <= (i32::MAX as i64) {
                 (ConcreteTypePart::SInt32, 4)
             } else {
                 (ConcreteTypePart::SInt64, 8)
+            }
         };
         return (ConcreteType{ parts: vec![part] }, size);
+    }
     //--------------------------------------------------------------------------
     // Small utilities
     //--------------------------------------------------------------------------
     fn create_polymorphic_variables(variables: &[Identifier]) -> Vec<PolymorphicVariable> {
         let mut result = Vec::with_capacity(variables.len());
         for variable in variables.iter() {
             result.push(PolymorphicVariable{ identifier: variable.clone(), is_in_use: false });
+        }
         result
+    }
     fn mark_used_polymorphic_variables(poly_vars: &mut Vec<PolymorphicVariable>, parser_type: &ParserType) {
         for element in &parser_type.elements {
             if let ParserTypeVariant::PolymorphicArgument(_, idx) = &element.variant {
                 poly_vars[*idx as usize].is_in_use = true;
+            }
+        }
+    }
     /// Sets the search key to a specific type.
     fn set_search_key_to_type(search_key: &mut MonoSearchKey, definition_map: &DefinitionMap, type_parts: &[ConcreteTypePart]) {
         use ConcreteTypePart as CTP;
         match type_parts[0] {
             // Builtin types without any embedded types
             CTP::Void | CTP::Message | CTP::Bool |
             CTP::UInt8 | CTP::UInt16 | CTP::UInt32 | CTP::UInt64 |
             CTP::SInt8 | CTP::SInt16 | CTP::SInt32 | CTP::SInt64 |
             CTP::Character | CTP::String => {
                 debug_assert_eq!(type_parts.len(), 1);
                 search_key.set_top_type(type_parts[0]);
             },
             // Builtin types with a single nested type
             CTP::Array | CTP::Slice | CTP::Input | CTP::Output | CTP::Pointer => {
                 debug_assert_eq!(type_parts[0].num_embedded(), 1);
                 search_key.set(type_parts, &POLY_VARS_IN_USE[..1])
             },
             // User-defined types
             CTP::Tuple(_) => {
                 Self::set_search_key_to_tuple(search_key, definition_map, type_parts);
             },
             CTP::Instance(definition_id, _) => {
                 let definition_type = definition_map.get(&definition_id).unwrap();
                 search_key.set(type_parts, &definition_type.poly_vars);
             },
             CTP::Function(_, _) | CTP::Component(_, _) => {
                 todo!("implement function pointers")
             },
+        }
+    }
     fn set_search_key_to_tuple(search_key: &mut MonoSearchKey, definition_map: &DefinitionMap, type_parts: &[ConcreteTypePart]) {
         dbg_code!({
             let is_tuple = if let ConcreteTypePart::Tuple(_) = type_parts[0] { true } else { false };
             assert!(is_tuple);
         });
         search_key.set_top_type(type_parts[0]);
         for subtree in ConcreteTypeIter::new(type_parts, 0) {
             if let Some(definition_id) = get_concrete_type_definition(subtree) {
                 // A definition, so retrieve poly var usage info
                 let definition_type = definition_map.get(&definition_id).unwrap();
                 search_key.push_subtree(subtree, &definition_type.poly_vars);
             } else {
                 // Not a definition, so all type information is important
                 search_key.push_subtype(subtree, true);
+            }
+        }
+    }
+}
 #[inline]
 fn align_offset_to(offset: &mut usize, alignment: usize) {
     debug_assert!(alignment > 0);
     let alignment_min_1 = alignment - 1;
     *offset += alignment_min_1;
     *offset &= !(alignment_min_1);
+}
 #[inline]
 fn get_concrete_type_definition(concrete_parts: &[ConcreteTypePart]) -> Option<DefinitionId> {
     match concrete_parts[0] {
         ConcreteTypePart::Instance(definition_id, _) => {
             return Some(definition_id)
         },
         ConcreteTypePart::Function(definition_id, _) |
         ConcreteTypePart::Component(definition_id, _) => {
             return Some(definition_id.upcast());
         },
         _ => {
             return None;

src/runtime2/tests/mod.rs

➞

Show inline comments

@@ @@ -31,192 +31,209 @@ fn test_component_creation() { @@
+}
 #[test]
 fn test_component_communication() {
     let pd = ProtocolDescription::parse(b"
     primitive sender(out<u32> o, u32 outside_loops, u32 inside_loops) {
         u32 outside_index = 0;
         while (outside_index < outside_loops) {
             u32 inside_index = 0;
             sync while (inside_index < inside_loops) {
                 put(o, inside_index);
                 inside_index += 1;
+            }
             outside_index += 1;
+        }
+    }
     primitive receiver(in<u32> i, u32 outside_loops, u32 inside_loops) {
         u32 outside_index = 0;
         while (outside_index < outside_loops) {
             u32 inside_index = 0;
             sync while (inside_index < inside_loops) {
                 auto val = get(i);
                 while (val != inside_index) {} // infinite loop if incorrect value is received
                 inside_index += 1;
+            }
             outside_index += 1;
+        }
+    }
     composite constructor() {
         channel o_orom -> i_orom;
         channel o_mrom -> i_mrom;
         channel o_ormm -> i_ormm;
         channel o_mrmm -> i_mrmm;
         // one round, one message per round
         new sender(o_orom, 1, 1);
         new receiver(i_orom, 1, 1);
         // multiple rounds, one message per round
         new sender(o_mrom, 5, 1);
         new receiver(i_mrom, 5, 1);
         // one round, multiple messages per round
         new sender(o_ormm, 1, 5);
         new receiver(i_ormm, 1, 5);
         // multiple rounds, multiple messages per round
         new sender(o_mrmm, 5, 5);
         new receiver(i_mrmm, 5, 5);
     }").expect("compilation");
     let rt = Runtime::new(3, true, pd);
     create_component(&rt, "", "constructor", no_args());
+}
 #[test]
 fn test_intermediate_messenger() {
     let pd = ProtocolDescription::parse(b"
     primitive receiver<T>(in<T> rx, u32 num) {
         auto index = 0;
         while (index < num) {
             sync { auto v = get(rx); }
             index += 1;
+        }
+    }
     primitive middleman<T>(in<T> rx, out<T> tx, u32 num) {
         auto index = 0;
         while (index < num) {
             sync { put(tx, get(rx)); }
             index += 1;
+        }
+    }
     primitive sender<T>(out<T> tx, u32 num) {
         auto index = 0;
         while (index < num) {
             sync put(tx, 1337);
             index += 1;
+        }
+    }
     composite constructor_template<T>() {
         auto num = 0;
         channel<T> tx_a -> rx_a;
         channel tx_b -> rx_b;
         new sender(tx_a, 3);
         new middleman(rx_a, tx_b, 3);
         new receiver(rx_b, 3);
+    }
     composite constructor() {
         new constructor_template<u16>();
         new constructor_template<u32>();
         new constructor_template<u64>();
         new constructor_template<s16>();
         new constructor_template<s32>();
         new constructor_template<s64>();
+    }
     ").expect("compilation");
     let rt = Runtime::new(3, true, pd);
     create_component(&rt, "", "constructor", no_args());
+}
 #[test]
 fn test_simple_select() {
     let pd = ProtocolDescription::parse(b"
     func infinite_assert<T>(T val, T expected) -> () {
         while (val != expected) { print(\"nope!\"); }
         return ();
+    }
     primitive receiver(in<u32> in_a, in<u32> in_b, u32 num_sends) {
         auto num_from_a = 0;
         auto num_from_b = 0;
         while (num_from_a + num_from_b < 2 * num_sends) {
             sync select {
                 auto v = get(in_a) -> {
                     print(\"got something from A\");
                     auto _ = infinite_assert(v, num_from_a);
                     num_from_a += 1;
+                }
                 auto v = get(in_b) -> {
                     print(\"got something from B\");
                     auto _ = infinite_assert(v, num_from_b);
                     num_from_b += 1;
+                }
+            }
+        }
+    }
     primitive sender(out<u32> tx, u32 num_sends) {
         auto index = 0;
         while (index < num_sends) {
             sync {
                 put(tx, index);
                 index += 1;
+            }
+        }
+    }
     composite constructor() {
         auto num_sends = 15;
         channel tx_a -> rx_a;
         channel tx_b -> rx_b;
         new sender(tx_a, num_sends);
         new receiver(rx_a, rx_b, num_sends);
         new sender(tx_b, num_sends);
+    }
     ").expect("compilation");
     let rt = Runtime::new(3, false, pd);
     create_component(&rt, "", "constructor", no_args());
+}
 #[test]
 fn test_unguarded_select() {
     let pd = ProtocolDescription::parse(b"
     primitive constructor_outside_select() {
         u32 index = 0;
         while (index < 5) {
             sync select { auto v = () -> print(\"hello\"); }
             index += 1;
+        }
+    }
     primitive constructor_inside_select() {
         u32 index = 0;
         while (index < 5) {
             sync select { auto v = () -> index += 1; }
+        }
+    }
     ").expect("compilation");
     let rt = Runtime::new(3, false, pd);
     create_component(&rt, "", "constructor_outside_select", no_args());
     create_component(&rt, "", "constructor_inside_select", no_args());
+}
 #[test]
 fn test_empty_select() {
     let pd = ProtocolDescription::parse(b"
     primitive constructor() {
         u32 index = 0;
         while (index < 5) {
             sync select {}
             index += 1;
+        }
+    }
     ").expect("compilation");
     let rt = Runtime::new(3, false, pd);
     create_component(&rt, "", "constructor", no_args());
+}
 #[test]
 fn test_random_u32_temporary_thingo() {
     let pd = ProtocolDescription::parse(b"
     primitive random_taker(in<u32> generator) {
         sync {
             auto a = get(generator);
+        }
+    }
     composite constructor() {
         channel tx -> rx;
         new random_u32(tx, 1, 100);
         new random_taker(rx);
+    }
     ").expect("compilation");
+}
@@ \ No newline at end of file @@

std/std.global.pdl

➞

Show inline comments

 #module std.global
 // Note: parsing of token ranges and pragma needs to change. For now we insert
 // spaces to work with the current system. Needs to be a system where the
 // pragmas, "func" keywords (and similar keywords) indicate initial points to
 // start parsing.
 func get<T>(in<T> input) -> T { #builtin }
 func put<T>(out<T> output, T value) -> #type_void { #builtin }
 func fires<T>(#type_portlike<T> port) -> bool { #builtin }
 func create<T>(#type_integerlike len) -> T[] { #builtin }
 func length<T>(#type_arraylike<T> array) -> u32 { #builtin }
 func assert(bool condition) -> #type_void { #builtin }
 func print(string message) -> #type_void { #builtin }
@@ \ No newline at end of file @@

std/std.random.pdl

➞

Show inline comments

		new file 100644
		#module std.random

		primitive random_u32(out<u32> generator, u32 min, u32 max) { #builtin }

0 comments (0 inline, 0 general)