CSY/reowolf Changeset - 6938bcacc41e · Centrum Wiskunde & Informatica (CWI)

Changeset - 6938bcacc41e

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0 10 0

MH - 4 years ago 2021-03-22 11:59:28
contact@maxhenger.nl

turn put stmt into call expr, make compiling great again

10 files changed with 441 insertions and 198 deletions:

src/protocol/ast.rs

src/protocol/ast_printer.rs

src/protocol/eval.rs

src/protocol/lexer.rs

src/protocol/mod.rs

src/protocol/parser/depth_visitor.rs

src/protocol/parser/type_resolver.rs

351

src/protocol/parser/type_table.rs

src/protocol/parser/visitor.rs

src/protocol/parser/visitor_linker.rs

0 comments (0 inline, 0 general)

src/protocol/ast.rs

➞

Show inline comments

 define_new_ast_id!(SynchronousStatementId, StatementId, SynchronousStatement, Statement::Synchronous, statements);
 define_new_ast_id!(EndSynchronousStatementId, StatementId, EndSynchronousStatement, Statement::EndSynchronous, statements);
 define_new_ast_id!(ReturnStatementId, StatementId, ReturnStatement, Statement::Return, statements);
 define_new_ast_id!(AssertStatementId, StatementId, AssertStatement, Statement::Assert, statements);
 define_new_ast_id!(GotoStatementId, StatementId, GotoStatement, Statement::Goto, statements);
 define_new_ast_id!(NewStatementId, StatementId, NewStatement, Statement::New, statements);
 define_new_ast_id!(PutStatementId, StatementId, PutStatement, Statement::Put, statements);
 define_new_ast_id!(ExpressionStatementId, StatementId, ExpressionStatement, Statement::Expression, statements);
 define_aliased_ast_id!(ExpressionId, Id<Expression>, Expression, expressions);
 define_new_ast_id!(AssignmentExpressionId, ExpressionId, AssignmentExpression, Expression::Assignment, expressions);
 define_new_ast_id!(ConditionalExpressionId, ExpressionId, ConditionalExpression, Expression::Conditional, expressions);
 define_new_ast_id!(BinaryExpressionId, ExpressionId, BinaryExpression, Expression::Binary, expressions);
@@ @@ -418,20 +417,12 @@ impl Heap { @@
         f: impl FnOnce(NewStatementId) -> NewStatement,
     ) -> NewStatementId {
         NewStatementId(
             self.statements.alloc_with_id(|id| Statement::New(f(NewStatementId(id)))),
+        )
+    }
     pub fn alloc_put_statement(
         &mut self,
         f: impl FnOnce(PutStatementId) -> PutStatement,
     ) -> PutStatementId {
         PutStatementId(
             self.statements.alloc_with_id(|id| Statement::Put(f(PutStatementId(id)))),
+        )
+    }
     pub fn alloc_labeled_statement(
         &mut self,
         f: impl FnOnce(LabeledStatementId) -> LabeledStatement,
     ) -> LabeledStatementId {
         LabeledStatementId(
             self.statements
@@ @@ -905,12 +896,13 @@ pub enum Constant { @@
     Integer(IntegerData),
+}
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub enum Method {
     Get,
     Put,
     Fires,
     Create,
     Symbolic(MethodSymbolic)
+}
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
@@ @@ -1268,13 +1260,12 @@ pub enum Statement { @@
     Synchronous(SynchronousStatement),
     EndSynchronous(EndSynchronousStatement),
     Return(ReturnStatement),
     Assert(AssertStatement),
     Goto(GotoStatement),
     New(NewStatement),
     Put(PutStatement),
     Expression(ExpressionStatement),
+}
 impl Statement {
     pub fn as_block(&self) -> &BlockStatement {
         match self {
@@ @@ -1429,18 +1420,12 @@ impl Statement { @@
     pub fn as_new(&self) -> &NewStatement {
         match self {
             Statement::New(result) => result,
             _ => panic!("Unable to cast `Statement` to `NewStatement`"),
+        }
+    }
     pub fn as_put(&self) -> &PutStatement {
         match self {
             Statement::Put(result) => result,
             _ => panic!("Unable to cast `Statement` to `PutStatement`"),
+        }
+    }
     pub fn as_expression(&self) -> &ExpressionStatement {
         match self {
             Statement::Expression(result) => result,
             _ => panic!("Unable to cast `Statement` to `ExpressionStatement`"),
+        }
+    }
@@ @@ -1454,13 +1439,12 @@ impl Statement { @@
             Statement::Skip(stmt) => stmt.next = Some(next),
             Statement::EndIf(stmt) => stmt.next = Some(next),
             Statement::EndWhile(stmt) => stmt.next = Some(next),
             Statement::EndSynchronous(stmt) => stmt.next = Some(next),
             Statement::Assert(stmt) => stmt.next = Some(next),
             Statement::New(stmt) => stmt.next = Some(next),
             Statement::Put(stmt) => stmt.next = Some(next),
             Statement::Expression(stmt) => stmt.next = Some(next),
             Statement::Return(_)
             | Statement::Break(_)
             | Statement::Continue(_)
             | Statement::Synchronous(_)
             | Statement::Goto(_)
@@ @@ -1487,13 +1471,12 @@ impl SyntaxElement for Statement { @@
             Statement::Synchronous(stmt) => stmt.position(),
             Statement::EndSynchronous(stmt) => stmt.position(),
             Statement::Return(stmt) => stmt.position(),
             Statement::Assert(stmt) => stmt.position(),
             Statement::Goto(stmt) => stmt.position(),
             Statement::New(stmt) => stmt.position(),
             Statement::Put(stmt) => stmt.position(),
             Statement::Expression(stmt) => stmt.position(),
+        }
+    }
+}
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
@@ @@ -1880,29 +1863,12 @@ pub struct NewStatement { @@
 impl SyntaxElement for NewStatement {
     fn position(&self) -> InputPosition {
         self.position
+    }
+}
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub struct PutStatement {
     pub this: PutStatementId,
     // Phase 1: parser
     pub position: InputPosition,
     pub port: ExpressionId,
     pub message: ExpressionId,
     // Phase 2: linker
     pub next: Option<StatementId>,
+}
 impl SyntaxElement for PutStatement {
     fn position(&self) -> InputPosition {
         self.position
+    }
+}
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub struct ExpressionStatement {
     pub this: ExpressionStatementId,
     // Phase 1: parser
     pub position: InputPosition,
     pub expression: ExpressionId,
@@ @@ -1922,13 +1888,12 @@ pub enum ExpressionParent { @@
     Memory(MemoryStatementId),
     If(IfStatementId),
     While(WhileStatementId),
     Return(ReturnStatementId),
     Assert(AssertStatementId),
     New(NewStatementId),
     Put(PutStatementId, u32), // index of arg
     ExpressionStmt(ExpressionStatementId),
     Expression(ExpressionId, u32) // index within expression (e.g LHS or RHS of expression)
+}
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub enum Expression {
@@ @@ -2037,12 +2002,19 @@ impl Expression { @@
             Expression::Array(expr) => &expr.parent,
             Expression::Constant(expr) => &expr.parent,
             Expression::Call(expr) => &expr.parent,
             Expression::Variable(expr) => &expr.parent,
+        }
+    }
     pub fn parent_expr_id(&self) -> Option<ExpressionId> {
         if let ExpressionParent::Expression(id, _) = self.parent() {
             Some(*id)
         } else {
             None
+        }
+    }
     pub fn set_parent(&mut self, parent: ExpressionParent) {
         match self {
             Expression::Assignment(expr) => expr.parent = parent,
             Expression::Conditional(expr) => expr.parent = parent,
             Expression::Binary(expr) => expr.parent = parent,
             Expression::Unary(expr) => expr.parent = parent,

src/protocol/ast_printer.rs

➞

Show inline comments

@@ @@ -482,22 +482,12 @@ impl ASTWriter { @@
                     .with_s_key("New");
                 self.kv(indent2).with_s_key("Expression");
                 self.write_expr(heap, stmt.expression.upcast(), indent3);
                 self.kv(indent2).with_s_key("Next")
                     .with_opt_disp_val(stmt.next.as_ref().map(|v| &v.index));
             },
             Statement::Put(stmt) => {
                 self.kv(indent).with_id(PREFIX_PUT_STMT_ID, stmt.this.0.index)
                     .with_s_key("Put");
                 self.kv(indent2).with_s_key("Port");
                 self.write_expr(heap, stmt.port, indent3);
                 self.kv(indent2).with_s_key("Message");
                 self.write_expr(heap, stmt.message, indent3);
                 self.kv(indent2).with_s_key("Next")
                     .with_opt_disp_val(stmt.next.as_ref().map(|v| &v.index));
             },
             Statement::Expression(stmt) => {
                 self.kv(indent).with_id(PREFIX_EXPR_STMT_ID, stmt.this.0.index)
                     .with_s_key("ExpressionStatement");
                 self.write_expr(heap, stmt.expression, indent2);
                 self.kv(indent2).with_s_key("Next")
                     .with_opt_disp_val(stmt.next.as_ref().map(|v| &v.index));
@@ @@ -625,12 +615,13 @@ impl ASTWriter { @@
                     .with_s_key("CallExpr");
                 // Method
                 let method = self.kv(indent2).with_s_key("Method");
                 match &expr.method {
                     Method::Get => { method.with_s_val("get"); },
                     Method::Put => { method.with_s_val("put"); },
                     Method::Fires => { method.with_s_val("fires"); },
                     Method::Create => { method.with_s_val("create"); },
                     Method::Symbolic(symbolic) => {
                         method.with_s_val("symbolic");
                         self.kv(indent3).with_s_key("Name").with_ascii_val(&symbolic.identifier.value);
                         self.kv(indent3).with_s_key("Definition")
         EP::Memory(id) => format!("MemoryStmt({})", id.0.0.index),
         EP::If(id) => format!("IfStmt({})", id.0.index),
         EP::While(id) => format!("WhileStmt({})", id.0.index),
         EP::Return(id) => format!("ReturnStmt({})", id.0.index),
         EP::Assert(id) => format!("AssertStmt({})", id.0.index),
         EP::New(id) => format!("NewStmt({})", id.0.index),
         EP::Put(id, idx) => format!("PutStmt({}, {})", id.0.index, idx),
         EP::ExpressionStmt(id) => format!("ExprStmt({})", id.0.index),
         EP::Expression(id, idx) => format!("Expr({}, {})", id.index, idx)
     };
+}
@@ \ No newline at end of file @@

src/protocol/eval.rs

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Show inline comments

@@ @@ -1496,32 +1496,43 @@ impl Store { @@
                     elements.push(self.eval(h, ctx, elem)?);
+                }
                 todo!()
+            }
             Expression::Constant(expr) => Ok(Value::from_constant(&expr.value)),
             Expression::Call(expr) => match &expr.method {
-                Method::Create => {
+                Method::Get => {
                     assert_eq!(1, expr.arguments.len());
                     let length = self.eval(h, ctx, expr.arguments[0])?;
                     Ok(Value::create_message(length))
                     let value = self.eval(h, ctx, expr.arguments[0])?;
                     match ctx.get(value.clone()) {
                         None => Err(EvalContinuation::BlockGet(value)),
                         Some(result) => Ok(result),
+                    }
+                }
                 Method::Put => {
                     assert_eq!(2, expr.arguments.len());
                     let port_value = self.eval(h, ctx, expr.arguments[0])?;
                     let msg_value = self.eval(h, ctx, expr.arguments[1])?;
                     if ctx.did_put(port_value.clone()) {
                         // Return bogus, replacing this at some point anyway
                         Ok(Value::Message(MessageValue(None)))
                     } else {
                         Err(EvalContinuation::Put(port_value, msg_value))
+                    }
+                }
                 Method::Fires => {
                     assert_eq!(1, expr.arguments.len());
                     let value = self.eval(h, ctx, expr.arguments[0])?;
                     match ctx.fires(value.clone()) {
                         None => Err(EvalContinuation::BlockFires(value)),
                         Some(result) => Ok(result),
+                    }
+                }
-                Method::Get => {
+                Method::Create => {
                     assert_eq!(1, expr.arguments.len());
                     let value = self.eval(h, ctx, expr.arguments[0])?;
                     match ctx.get(value.clone()) {
                         None => Err(EvalContinuation::BlockGet(value)),
                         Some(result) => Ok(result),
+                    }
                     let length = self.eval(h, ctx, expr.arguments[0])?;
                     Ok(Value::create_message(length))
+                }
                 Method::Symbolic(_symbol) => unimplemented!(),
             },
             Expression::Variable(expr) => self.get(h, ctx, expr.this.upcast()),
+        }
+    }
@@ @@ -1693,21 +1704,12 @@ impl Prompt { @@
                     Method::Symbolic(symbolic) => {
                          Err(EvalContinuation::NewComponent(symbolic.definition.unwrap(), args))
                     },
                     _ => unreachable!("not a symbolic call expression")
+                }
+            }
             Statement::Put(stmt) => {
                 // Evaluate port and message
                 let port = self.store.eval(h, ctx, stmt.port)?;
                 let message = self.store.eval(h, ctx, stmt.message)?;
                 // Continue to next statement
                 self.position = stmt.next;
                 // Signal the put upwards
                 Err(EvalContinuation::Put(port, message))
+            }
             Statement::Expression(stmt) => {
                 // Evaluate expression
                 let _value = self.store.eval(h, ctx, stmt.expression)?;
                 // Continue to next statement
                 self.position = stmt.next;
                 Err(EvalContinuation::Stepping)

src/protocol/lexer.rs

➞

Show inline comments

@@ @@ -1411,13 +1411,13 @@ impl Lexer<'_> { @@
         let backup_pos = self.source.pos();
         let mut result = false;
         if self.consume_namespaced_identifier_spilled().is_ok() &&
             self.consume_whitespace(false).is_ok() &&
-            self.maybe_consume_poly_args_spilled_without_pos_recovery().is_ok() &&
             self.maybe_consume_poly_args_spilled_without_pos_recovery() &&
             self.consume_whitespace(false).is_ok() &&
             self.source.next() == Some(b'(') {
             // Seems like we have a function call or an enum literal
             result = true;
+        }
@@ @@ -1429,12 +1429,15 @@ impl Lexer<'_> { @@
         // Consume method identifier
         let method;
         if self.has_keyword(b"get") {
             self.consume_keyword(b"get")?;
             method = Method::Get;
         } else if self.has_keyword(b"put") {
             self.consume_keyword(b"put")?;
             method = Method::Put;
         } else if self.has_keyword(b"fires") {
             self.consume_keyword(b"fires")?;
             method = Method::Fires;
         } else if self.has_keyword(b"create") {
             self.consume_keyword(b"create")?;
             method = Method::Create;
@@ @@ -1550,14 +1553,12 @@ impl Lexer<'_> { @@
         } else if self.has_keyword(b"assert") {
             self.consume_assert_statement(h)?.upcast()
         } else if self.has_keyword(b"goto") {
             self.consume_goto_statement(h)?.upcast()
         } else if self.has_keyword(b"new") {
             self.consume_new_statement(h)?.upcast()
         } else if self.has_keyword(b"put") {
             self.consume_put_statement(h)?.upcast()
         } else if self.has_label() {
             self.consume_labeled_statement(h)?.upcast()
         } else {
             self.consume_expression_statement(h)?.upcast()
         };
@@ @@ -1896,28 +1897,12 @@ impl Lexer<'_> { @@
         self.consume_whitespace(false)?;
         let expression = self.consume_call_expression(h)?;
         self.consume_whitespace(false)?;
         self.consume_string(b";")?;
         Ok(h.alloc_new_statement(|this| NewStatement { this, position, expression, next: None }))
+    }
     fn consume_put_statement(&mut self, h: &mut Heap) -> Result<PutStatementId, ParseError2> {
         let position = self.source.pos();
         self.consume_keyword(b"put")?;
         self.consume_whitespace(false)?;
         self.consume_string(b"(")?;
         let port = self.consume_expression(h)?;
         self.consume_whitespace(false)?;
         self.consume_string(b",")?;
         self.consume_whitespace(false)?;
         let message = self.consume_expression(h)?;
         self.consume_whitespace(false)?;
         self.consume_string(b")")?;
         self.consume_whitespace(false)?;
         self.consume_string(b";")?;
         Ok(h.alloc_put_statement(|this| PutStatement { this, position, port, message, next: None }))
+    }
     fn consume_expression_statement(
         &mut self,
         h: &mut Heap,
     ) -> Result<ExpressionStatementId, ParseError2> {
         let position = self.source.pos();
         let expression = self.consume_expression(h)?;

src/protocol/mod.rs

➞

Show inline comments

@@ @@ -291,7 +291,19 @@ impl EvalContext<'_> { @@
                     context.read_msg(port).map(Value::receive_message)
+                }
                 _ => unreachable!(),
             },
+        }
+    }
     fn did_put(&mut self, port: Value) -> bool {
         match self {
             EvalContext::Nonsync(_) => unreachable!("did_put in nonsync context"),
             EvalContext::Sync(context) => match port {
                 Value::Output(OutputValue(port)) => {
                     context.is_firing(port).unwrap_or(false)
                 },
                 Value::Input(_) => unreachable!("did_put on input port"),
                 _ => unreachable!("did_put on non-port value")
+            }
+        }
+    }
+}

src/protocol/parser/depth_visitor.rs

➞

Show inline comments

@@ @@ -115,15 +115,12 @@ pub(crate) trait Visitor: Sized { @@
     fn visit_goto_statement(&mut self, _h: &mut Heap, _stmt: GotoStatementId) -> VisitorResult {
         Ok(())
+    }
     fn visit_new_statement(&mut self, h: &mut Heap, stmt: NewStatementId) -> VisitorResult {
         recursive_new_statement(self, h, stmt)
+    }
     fn visit_put_statement(&mut self, h: &mut Heap, stmt: PutStatementId) -> VisitorResult {
         recursive_put_statement(self, h, stmt)
+    }
     fn visit_expression_statement(
         &mut self,
         h: &mut Heap,
         stmt: ExpressionStatementId,
     ) -> VisitorResult {
         recursive_expression_statement(self, h, stmt)
         Statement::Continue(stmt) => this.visit_continue_statement(h, stmt.this),
         Statement::Synchronous(stmt) => this.visit_synchronous_statement(h, stmt.this),
         Statement::Return(stmt) => this.visit_return_statement(h, stmt.this),
         Statement::Assert(stmt) => this.visit_assert_statement(h, stmt.this),
         Statement::Goto(stmt) => this.visit_goto_statement(h, stmt.this),
         Statement::New(stmt) => this.visit_new_statement(h, stmt.this),
         Statement::Put(stmt) => this.visit_put_statement(h, stmt.this),
         Statement::Expression(stmt) => this.visit_expression_statement(h, stmt.this),
         Statement::EndSynchronous(stmt) => this.visit_end_synchronous_statement(h, stmt.this),
         Statement::EndWhile(stmt) => this.visit_end_while_statement(h, stmt.this),
         Statement::EndIf(stmt) => this.visit_end_if_statement(h, stmt.this),
+    }
+}
@@ @@ -421,21 +417,12 @@ fn recursive_new_statement<T: Visitor>( @@
     h: &mut Heap,
     stmt: NewStatementId,
 ) -> VisitorResult {
     recursive_call_expression_as_expression(this, h, h[stmt].expression)
+}
 fn recursive_put_statement<T: Visitor>(
     this: &mut T,
     h: &mut Heap,
     stmt: PutStatementId,
 ) -> VisitorResult {
     this.visit_expression(h, h[stmt].port)?;
     this.visit_expression(h, h[stmt].message)
+}
 fn recursive_expression_statement<T: Visitor>(
     this: &mut T,
     h: &mut Heap,
     stmt: ExpressionStatementId,
 ) -> VisitorResult {
     this.visit_expression(h, h[stmt].expression)
@@ @@ -966,16 +953,12 @@ impl Visitor for LinkStatements { @@
         Ok(())
+    }
     fn visit_new_statement(&mut self, _h: &mut Heap, stmt: NewStatementId) -> VisitorResult {
         self.prev = Some(UniqueStatementId(stmt.upcast()));
         Ok(())
+    }
     fn visit_put_statement(&mut self, _h: &mut Heap, stmt: PutStatementId) -> VisitorResult {
         self.prev = Some(UniqueStatementId(stmt.upcast()));
         Ok(())
+    }
     fn visit_expression_statement(
         &mut self,
         _h: &mut Heap,
         stmt: ExpressionStatementId,
     ) -> VisitorResult {
         self.prev = Some(UniqueStatementId(stmt.upcast()));

src/protocol/parser/type_resolver.rs

➞

Show inline comments

 /// type_resolver.rs
 ///
 /// Performs type inference and type checking
 ///
 /// TODO: Needs an optimization pass
 /// TODO: Needs a cleanup pass
 use std::collections::{HashMap, HashSet, VecDeque};
 use crate::protocol::ast::*;
 use crate::protocol::inputsource::*;
 use super::type_table::*;
 use super::symbol_table::*;
@@ @@ -9,13 +16,15 @@ use super::visitor::{ @@
     EXPR_BUFFER_INIT_CAPACITY,
     Ctx,
     Visitor2,
     VisitorResult
 };
 use std::collections::hash_map::Entry;
 use crate::protocol::parser::type_resolver::InferenceTypePart::IntegerLike;
 const MESSAGE_TEMPLATE: [InferenceTypePart; 1] = [ InferenceTypePart::Message ];
 const BOOL_TEMPLATE: [InferenceTypePart; 1] = [ InferenceTypePart::Bool ];
 const NUMBERLIKE_TEMPLATE: [InferenceTypePart; 1] = [ InferenceTypePart::NumberLike ];
 const INTEGERLIKE_TEMPLATE: [InferenceTypePart; 1] = [ InferenceTypePart::IntegerLike ];
 const ARRAY_TEMPLATE: [InferenceTypePart; 2] = [ InferenceTypePart::Array, InferenceTypePart::Unknown ];
 const ARRAYLIKE_TEMPLATE: [InferenceTypePart; 2] = [ InferenceTypePart::ArrayLike, InferenceTypePart::Unknown ];
 const PORTLIKE_TEMPLATE: [InferenceTypePart; 2] = [ InferenceTypePart::PortLike, InferenceTypePart::Unknown ];
@@ @@ -178,12 +187,19 @@ impl InferenceType { @@
                 debug_assert!(parts.iter().all(|v| v.is_concrete()));
+            }
+        }
         Self{ has_marker, is_done, parts }
+    }
     fn replace_subtree(&mut self, start_idx: usize, with: &[InferenceTypePart]) {
          let end_idx = Self::find_subtree_end_idx(&self.parts, start_idx);
         debug_assert_eq!(with.len(), Self::find_subtree_end_idx(with, 0));
         self.parts.splice(start_idx..end_idx, with.iter().cloned());
         self.recompute_is_done();
+    }
     // TODO: @performance, might all be done inline in the type inference methods
     fn recompute_is_done(&mut self) {
         self.is_done = self.parts.iter().all(|v| v.is_concrete());
+    }
     /// Checks if type is, or may be inferred as, a number
@@ @@ -226,16 +242,21 @@ impl InferenceType { @@
         match self.parts[0] {
             ITP::Unknown | ITP::Bool => true,
             _ => false
+        }
+    }
     /// Returns an iterator over all markers and the partial type tree that
     /// follows those markers.
     fn marker_iter(&self) -> InferenceTypeMarkerIter {
         InferenceTypeMarkerIter::new(&self.parts)
+    }
     /// Attempts to find a marker with a specific value appearing at or after
     /// the specified index. If found then the partial type tree's bounding
     /// indices that follow that marker are returned.
     fn find_subtree_idx_for_marker(&self, marker: usize, mut idx: usize) -> Option<(usize, usize)> {
         // Seek ahead to find a marker
         let marker = InferenceTypePart::Marker(marker);
         while idx < self.parts.len() {
             if marker == self.parts[idx] {
                 // Found the marker
@@ @@ -697,47 +718,55 @@ pub(crate) struct TypeResolvingVisitor { @@
     // If instantiating a monomorph of a polymorphic proctype, then we store the
     // values of the polymorphic values here. There should be as many, and in
     // the same order as, in the definition's polyargs.
     polyvars: Vec<ConcreteType>,
     // Mapping from parser type to inferred type. We attempt to continue to
     // specify these types until we're stuck or we've fully determined the type.
     infer_types: HashMap<VariableId, InferenceType>,
     expr_types: HashMap<ExpressionId, InferenceType>,
     extra_data: HashMap<ExpressionId, ExtraData>,
     var_types: HashMap<VariableId, VarData>,      // types of variables
     expr_types: HashMap<ExpressionId, InferenceType>,   // types of expressions
     extra_data: HashMap<ExpressionId, ExtraData>,       // data for function call inference
     // Keeping track of which expressions need to be reinferred because the
     // expressions they're linked to made progression on an associated type
     expr_queued: HashSet<ExpressionId>,
+}
 // TODO: @rename used for calls and struct literals, maybe union literals?
 struct ExtraData {
     /// Progression of polymorphic variables (if any)
     poly_vars: Vec<InferenceType>,
     /// Progression of types of call arguments or struct members
     embedded: Vec<InferenceType>,
     returned: InferenceType,
+}
 struct VarData {
     var_type: InferenceType,
     used_at: Vec<ExpressionId>,
+}
 impl TypeResolvingVisitor {
     pub(crate) fn new() -> Self {
         TypeResolvingVisitor{
             definition_type: DefinitionType::None,
             stmt_buffer: Vec::with_capacity(STMT_BUFFER_INIT_CAPACITY),
             expr_buffer: Vec::with_capacity(EXPR_BUFFER_INIT_CAPACITY),
             polyvars: Vec::new(),
-            infer_types: HashMap::new(),
+            var_types: HashMap::new(),
             expr_types: HashMap::new(),
             extra_data: HashMap::new(),
             expr_queued: HashSet::new(),
+        }
+    }
     fn reset(&mut self) {
         self.definition_type = DefinitionType::None;
         self.stmt_buffer.clear();
         self.expr_buffer.clear();
         self.polyvars.clear();
-        self.infer_types.clear();
+        self.var_types.clear();
         self.expr_types.clear();
+    }
+}
 impl Visitor2 for TypeResolvingVisitor {
     // Definitions
@@ @@ -748,15 +777,15 @@ impl Visitor2 for TypeResolvingVisitor { @@
         let comp_def = &ctx.heap[id];
         debug_assert_eq!(comp_def.poly_vars.len(), self.polyvars.len(), "component polyvars do not match imposed polyvars");
         for param_id in comp_def.parameters.clone() {
             let param = &ctx.heap[param_id];
             let infer_type = self.determine_inference_type_from_parser_type(ctx, param.parser_type, true);
             debug_assert!(infer_type.is_done, "expected component arguments to be concrete types");
             self.infer_types.insert(param_id.upcast(), infer_type);
             let var_type = self.determine_inference_type_from_parser_type(ctx, param.parser_type, true);
             debug_assert!(var_type.is_done, "expected component arguments to be concrete types");
             self.var_types.insert(param_id.upcast(), VarData{ var_type, used_at: Vec::new() });
+        }
         let body_stmt_id = ctx.heap[id].body;
         self.visit_stmt(ctx, body_stmt_id)
+    }
@@ @@ -766,15 +795,15 @@ impl Visitor2 for TypeResolvingVisitor { @@
         let func_def = &ctx.heap[id];
         debug_assert_eq!(func_def.poly_vars.len(), self.polyvars.len(), "function polyvars do not match imposed polyvars");
         for param_id in func_def.parameters.clone() {
             let param = &ctx.heap[param_id];
             let infer_type = self.determine_inference_type_from_parser_type(ctx, param.parser_type, true);
             debug_assert!(infer_type.is_done, "expected function arguments to be concrete types");
             self.infer_types.insert(param_id.upcast(), infer_type);
             let var_type = self.determine_inference_type_from_parser_type(ctx, param.parser_type, true);
             debug_assert!(var_type.is_done, "expected function arguments to be concrete types");
             self.var_types.insert(param_id.upcast(), VarData{ var_type, used_at: Vec::new() });
+        }
         let body_stmt_id = ctx.heap[id].body;
         self.visit_stmt(ctx, body_stmt_id)
+    }
@@ @@ -792,31 +821,31 @@ impl Visitor2 for TypeResolvingVisitor { @@
+    }
     fn visit_local_memory_stmt(&mut self, ctx: &mut Ctx, id: MemoryStatementId) -> VisitorResult {
         let memory_stmt = &ctx.heap[id];
         let local = &ctx.heap[memory_stmt.variable];
         let infer_type = self.determine_inference_type_from_parser_type(ctx, local.parser_type, true);
         self.infer_types.insert(memory_stmt.variable.upcast(), infer_type);
         let var_type = self.determine_inference_type_from_parser_type(ctx, local.parser_type, true);
         self.var_types.insert(memory_stmt.variable.upcast(), VarData{ var_type, used_at: Vec::new() });
         let expr_id = memory_stmt.initial;
         self.visit_expr(ctx, expr_id)?;
         Ok(())
+    }
     fn visit_local_channel_stmt(&mut self, ctx: &mut Ctx, id: ChannelStatementId) -> VisitorResult {
         let channel_stmt = &ctx.heap[id];
         let from_local = &ctx.heap[channel_stmt.from];
         let from_infer_type = self.determine_inference_type_from_parser_type(ctx, from_local.parser_type, true);
         self.infer_types.insert(from_local.this.upcast(), from_infer_type);
         let from_var_type = self.determine_inference_type_from_parser_type(ctx, from_local.parser_type, true);
         self.var_types.insert(from_local.this.upcast(), VarData{ var_type: from_var_type, used_at: Vec::new() });
         let to_local = &ctx.heap[channel_stmt.to];
         let to_infer_type = self.determine_inference_type_from_parser_type(ctx, to_local.parser_type, true);
         self.infer_types.insert(to_local.this.upcast(), to_infer_type);
         let to_var_type = self.determine_inference_type_from_parser_type(ctx, to_local.parser_type, true);
         self.var_types.insert(to_local.this.upcast(), VarData{ var_type: to_var_type, used_at: Vec::new() });
         Ok(())
+    }
     fn visit_labeled_stmt(&mut self, ctx: &mut Ctx, id: LabeledStatementId) -> VisitorResult {
         let labeled_stmt = &ctx.heap[id];
@@ @@ -875,25 +904,12 @@ impl Visitor2 for TypeResolvingVisitor { @@
         let new_stmt = &ctx.heap[id];
         let call_expr_id = new_stmt.expression;
         self.visit_call_expr(ctx, call_expr_id)
+    }
     fn visit_put_stmt(&mut self, ctx: &mut Ctx, id: PutStatementId) -> VisitorResult {
         let put_stmt = &ctx.heap[id];
         let port_expr_id = put_stmt.port;
         let msg_expr_id = put_stmt.message;
         // TODO: What what?
         self.visit_expr(ctx, port_expr_id)?;
         self.visit_expr(ctx, msg_expr_id)?;
         Ok(())
+    }
     fn visit_expr_stmt(&mut self, ctx: &mut Ctx, id: ExpressionStatementId) -> VisitorResult {
         let expr_stmt = &ctx.heap[id];
         let subexpr_id = expr_stmt.expression;
         self.visit_expr(ctx, subexpr_id)
+    }
@@ @@ -949,17 +965,78 @@ impl Visitor2 for TypeResolvingVisitor { @@
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         let unary_expr = &ctx.heap[id];
         let arg_expr_id = unary_expr.expression;
         self.visit_expr(ctx, arg_expr_id);
+        self.visit_expr(ctx, arg_expr_id)?;
         self.progress_unary_expr(ctx, id)
+    }
     fn visit_indexing_expr(&mut self, ctx: &mut Ctx, id: IndexingExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         let indexing_expr = &ctx.heap[id];
         let subject_expr_id = indexing_expr.subject;
         let index_expr_id = indexing_expr.index;
         self.visit_expr(ctx, subject_expr_id)?;
         self.visit_expr(ctx, index_expr_id)?;
         self.progress_indexing_expr(ctx, id)
+    }
     fn visit_slicing_expr(&mut self, ctx: &mut Ctx, id: SlicingExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         let slicing_expr = &ctx.heap[id];
         let subject_expr_id = slicing_expr.subject;
         let from_expr_id = slicing_expr.from_index;
         let to_expr_id = slicing_expr.to_index;
         self.visit_expr(ctx, subject_expr_id)?;
         self.visit_expr(ctx, from_expr_id)?;
         self.visit_expr(ctx, to_expr_id)?;
         self.progress_slicing_expr(ctx, id)
+    }
     fn visit_select_expr(&mut self, ctx: &mut Ctx, id: SelectExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         let select_expr = &ctx.heap[id];
         let subject_expr_id = select_expr.subject;
         self.visit_expr(ctx, subject_expr_id)?;
         self.progress_select_expr(ctx, id)
+    }
     fn visit_array_expr(&mut self, ctx: &mut Ctx, id: ArrayExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         let array_expr = &ctx.heap[id];
         // TODO: @performance
         for element_id in array_expr.elements.clone().into_iter() {
             self.visit_expr(ctx, element_id)?;
+        }
         self.progress_array_expr(ctx, id)
+    }
     fn visit_constant_expr(&mut self, ctx: &mut Ctx, id: ConstantExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         self.progress_constant_expr(ctx, id)
+    }
     fn visit_call_expr(&mut self, ctx: &mut Ctx, id: CallExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         self.insert_initial_call_polymorph_data(ctx, id);
         // TODO: @performance
@@ @@ -967,12 +1044,24 @@ impl Visitor2 for TypeResolvingVisitor { @@
         for arg_expr_id in call_expr.arguments.clone() {
             self.visit_expr(ctx, arg_expr_id)?;
+        }
         self.progress_call_expr(ctx, id)
+    }
     fn visit_variable_expr(&mut self, ctx: &mut Ctx, id: VariableExpressionId) -> VisitorResult {
         let upcast_id = id.upcast();
         self.insert_initial_expr_inference_type(ctx, upcast_id)?;
         let var_expr = &ctx.heap[id];
         debug_assert!(var_expr.declaration.is_some());
         let var_data = self.var_types.get_mut(var_expr.declaration.as_ref().unwrap()).unwrap();
         var_data.used_at.push(upcast_id);
         self.progress_variable_expr(ctx, id)
+    }
+}
 macro_rules! debug_assert_expr_ids_unique_and_known {
     // Base case for a single expression ID
     ($resolver:ident, $id:ident) => {
         if cfg!(debug_assertions) {
@@ @@ -1206,12 +1295,85 @@ impl TypeResolvingVisitor { @@
         if progress_idx_base || progress_from { self.queue_expr(from_id); }
         if progress_idx_base || progress_to { self.queue_expr(to_id); }
         Ok(())
+    }
     fn progress_select_expr(&mut self, ctx: &mut Ctx, id: SelectExpressionId) -> Result<(), ParseError2> {
         let upcast_id = id.upcast();
         let expr = &ctx.heap[id];
         let subject_id = expr.subject;
         let (progress_subject, progress_expr) = match &expr.field {
             Field::Length => {
                 let progress_subject = self.apply_forced_constraint(ctx, subject_id, &ARRAYLIKE_TEMPLATE)?;
                 let progress_expr = self.apply_forced_constraint(ctx, upcast_id, &INTEGERLIKE_TEMPLATE)?;
                 (progress_subject, progress_expr)
             },
             Field::Symbolic(_field) => {
                 todo!("implement select expr for symbolic fields");
+            }
         };
         if progress_subject { self.queue_expr(subject_id); }
         if progress_expr { self.queue_expr_parent(ctx, upcast_id); }
         Ok(())
+    }
     fn progress_array_expr(&mut self, ctx: &mut Ctx, id: ArrayExpressionId) -> Result<(), ParseError2> {
         let upcast_id = id.upcast();
         let expr = &ctx.heap[id];
         let expr_elements = expr.elements.clone(); // TODO: @performance
         // All elements should have an equal type
         let progress = self.apply_equal_n_constraint(ctx, upcast_id, &expr_elements)?;
         let mut any_progress = false;
         for (progress_arg, arg_id) in progress.iter().zip(expr_elements.iter()) {
             if *progress_arg {
                 any_progress = true;
                 self.queue_expr(*arg_id);
+            }
+        }
         // And the output should be an array of the element types
         let mut expr_progress = self.apply_forced_constraint(ctx, upcast_id, &ARRAY_TEMPLATE)?;
         if !expr_elements.is_empty() {
             let first_arg_id = expr_elements[0];
             let (inner_expr_progress, arg_progress) = self.apply_equal2_constraint(
                 ctx, upcast_id, upcast_id, 1, first_arg_id, 0
             )?;
             expr_progress = expr_progress || inner_expr_progress;
             // Note that if the array type progressed the type of the arguments,
             // then we should enqueue this progression function again
             if arg_progress { self.queue_expr(upcast_id); }
+        }
         if expr_progress { self.queue_expr_parent(ctx, upcast_id); }
         Ok(())
+    }
     fn progress_constant_expr(&mut self, ctx: &mut Ctx, id: ConstantExpressionId) -> Result<(), ParseError2> {
         let upcast_id = id.upcast();
         let expr = &ctx.heap[id];
         let template = match &expr.value {
             Constant::Null => &MESSAGE_TEMPLATE,
             Constant::Integer(_) => &INTEGERLIKE_TEMPLATE,
             Constant::True | Constant::False => &BOOL_TEMPLATE,
             Constant::Character(_) => todo!("character literals")
         };
         let progress = self.apply_forced_constraint(ctx, upcast_id, template)?;
         if progress { self.queue_expr_parent(ctx, upcast_id); }
         Ok(())
+    }
     // TODO: @cleanup, see how this can be cleaned up once I implement
     //  polymorphic struct/enum/union literals. These likely follow the same
     //  pattern as here.
     fn progress_call_expr(&mut self, ctx: &mut Ctx, id: CallExpressionId) -> Result<(), ParseError2> {
         let upcast_id = id.upcast();
         let expr = &ctx.heap[id];
@@ @@ -1244,13 +1406,13 @@ impl TypeResolvingVisitor { @@
                         Err(()) => { poly_infer_error = true; }
+                    }
+                }
+            }
             if progress_arg {
                 // Progressed argument expression
-                self.queue_expr(arg_id);
+                self.expr_queued.insert(arg_id);
+            }
+        }
         // Do the same for the return type
         let signature_type = &mut extra.returned;
         let expr_type: *mut _ = self.expr_types.get_mut(&upcast_id).unwrap();
@@ @@ -1270,13 +1432,15 @@ impl TypeResolvingVisitor { @@
                     Ok(false) => {},
                     Err(()) => { poly_infer_error = true; }
+                }
+            }
+        }
         if progress_expr {
             self.queue_expr_parent(ctx, upcast_id);
             if let Some(parent_id) = ctx.heap[upcast_id].parent_expr_id() {
                 self.expr_queued.insert(parent_id);
+            }
+        }
         // If we had an error in the polymorphic variable's inference, then we
         // need to provide a human readable error: find a pair of inference
         // types in the arguments/return type that do not agree on the
         // polymorphic variable's type
@@ @@ -1289,32 +1453,103 @@ impl TypeResolvingVisitor { @@
         //  argument re-evaluation", instead of "all-argument re-evaluation",
         //  then this is no longer true
         for poly_idx in poly_progress.into_iter() {
             // For each polymorphic argument: first extend the signature type,
             // then reapply the equal2 constraint to the expressions
             let poly_type = &extra.poly_vars[poly_idx];
-            for (arg_idx, arg_type) in extra.embedded.iter_mut().enumerate() {
+            for (arg_idx, sig_type) in extra.embedded.iter_mut().enumerate() {
                 let mut seek_idx = 0;
                 let mut modified_sig = false;
-                while let Some((start_idx, end_idx)) = arg_type.find_subtree_idx_for_marker(poly_idx, seek_idx) {
+                while let Some((start_idx, end_idx)) = sig_type.find_subtree_idx_for_marker(poly_idx, seek_idx) {
                     let modified_at_marker = Self::apply_forced_constraint_types(
-                        arg_type, start_idx, &poly_type.parts, 0
+                        sig_type, start_idx, &poly_type.parts, 0
                     ).unwrap();
                     modified_sig = modified_sig || modified_at_marker;
                     seek_idx = end_idx;
+                }
                 if !modified_sig { continue; }
                 // Part of signature was modified, so update expression used as
                 // argument as well
                 let arg_expr_id = expr.arguments[arg_idx];
                 let arg_type = self.expr_types.get_mut(arg_expr_id).unwrap();
                 Self::apply_equal2_constraint_types(ctx, arg_expr_id, )
                 let arg_type: *mut _ = self.expr_types.get_mut(&arg_expr_id).unwrap();
                 let (progress_arg, _) = Self::apply_equal2_constraint_types(
                     ctx, arg_expr_id, arg_type, 0, sig_type, 0
                 ).expect("no inference error at argument type");
                 if progress_arg { self.expr_queued.insert(arg_expr_id); }
+            }
             // Again: do the same for the return type
             let sig_type = &mut extra.returned;
             let mut seek_idx = 0;
             let mut modified_sig = false;
             while let Some((start_idx, end_idx)) = sig_type.find_subtree_idx_for_marker(poly_idx, seek_idx) {
                 let modified_at_marker = Self::apply_forced_constraint_types(
                     sig_type, start_idx, &poly_type.parts, 0
                 ).unwrap();
                 modified_sig = modified_sig || modified_at_marker;
                 seek_idx = end_idx;
+            }
             if modified_sig {
                 let ret_type = self.expr_types.get_mut(&upcast_id).unwrap();
                 let (progress_ret, _) = Self::apply_equal2_constraint_types(
                     ctx, upcast_id, ret_type, 0, sig_type, 0
                 ).expect("no inference error at return type");
                 if progress_ret {
                     if let Some(parent_id) = ctx.heap[upcast_id].parent_expr_id() {
                         self.expr_queued.insert(parent_id);
+                    }
+                }
+            }
+        }
         Ok(())
+    }
     fn progress_variable_expr(&mut self, ctx: &mut Ctx, id: VariableExpressionId) -> Result<(), ParseError2> {
         let upcast_id = id.upcast();
         let var_expr = &ctx.heap[id];
         let var_id = var_expr.declaration.unwrap();
         // Retrieve shared variable type and expression type and apply inference
         let var_data = self.var_types.get_mut(&var_id).unwrap();
         let expr_type = self.expr_types.get_mut(&upcast_id).unwrap();
         let infer_res = unsafe{ InferenceType::infer_subtrees_for_both_types(
             &mut var_data.var_type as *mut _, 0, expr_type, 0
         ) };
         if infer_res == DualInferenceResult::Incompatible {
             let var_decl = &ctx.heap[var_id];
             return Err(ParseError2::new_error(
                 &ctx.module.source, var_decl.position(),
                 &format!(
                     "Conflicting types for this variable, previously assigned the type '{}'",
                     var_data.var_type.display_name(&ctx.heap)
+                )
             ).with_postfixed_info(
                 &ctx.module.source, var_expr.position,
                 &format!(
                     "But inferred to have incompatible type '{}' here",
                     expr_type.display_name(&ctx.heap)
+                )
             ))
+        }
         let progress_var = infer_res.modified_lhs();
         let progress_expr = infer_res.modified_rhs();
         if progress_var {
             for other_expr in var_data.used_at.iter() {
                 if *other_expr != upcast_id {
                     self.expr_queued.insert(*other_expr);
+                }
+            }
+        }
         if progress_expr { self.queue_expr_parent(ctx, upcast_id); }
         Ok(())
+    }
     fn queue_expr_parent(&mut self, ctx: &Ctx, expr_id: ExpressionId) {
         if let ExpressionParent::Expression(parent_expr_id, _) = &ctx.heap[expr_id].parent() {
@@ @@ -1439,22 +1674,83 @@ impl TypeResolvingVisitor { @@
         let mut progress_expr = expr_res.modified_lhs();
         let mut progress_arg1 = expr_res.modified_rhs();
         let mut progress_arg2 = args_res.modified_rhs();
         if args_res.modified_lhs() {
             unsafe {
                 (*expr_type).parts.drain(start_idx..);
                 (*expr_type).parts.extend_from_slice(&((*arg2_type).parts[start_idx..]));
                 let end_idx = InferenceType::find_subtree_end_idx(&(*arg2_type).parts, start_idx);
                 let subtree = &((*arg2_type).parts[start_idx..end_idx]);
                 (*expr_type).replace_subtree(start_idx, subtree);
+            }
             progress_expr = true;
             progress_arg1 = true;
+        }
         Ok((progress_expr, progress_arg1, progress_arg2))
+    }
     // TODO: @optimize Since we only deal with a single type this might be done
     //  a lot more efficiently, methinks (disregarding the allocations here)
     fn apply_equal_n_constraint(
         &mut self, ctx: &Ctx, expr_id: ExpressionId, args: &[ExpressionId],
     ) -> Result<Vec<bool>, ParseError2> {
         // Early exit
         match args.len() {
 => return Ok(vec!()),         // nothing to progress
 => return Ok(vec![false]),    // only one type, so nothing to infer
             _ => {}
+        }
         let mut progress = Vec::new();
         progress.resize(args.len(), false);
         // Do pairwise inference, keep track of the last entry we made progress
         // on. Once done we need to update everything to the most-inferred type.
         let mut arg_iter = args.iter();
         let mut last_arg_id = *arg_iter.next().unwrap();
         let mut last_lhs_progressed = 0;
         let mut lhs_arg_idx = 0;
         while let Some(next_arg_id) = arg_iter.next() {
             let arg1_type: *mut _ = self.expr_types.get_mut(&last_arg_id).unwrap();
             let arg2_type: *mut _ = self.expr_types.get_mut(next_arg_id).unwrap();
             let res = unsafe {
                 InferenceType::infer_subtrees_for_both_types(arg1_type, 0, arg2_type, 0)
             };
             if res == DualInferenceResult::Incompatible {
                 return Err(self.construct_arg_type_error(ctx, expr_id, last_arg_id, *next_arg_id));
+            }
             if res.modified_lhs() {
                 // We re-inferred something on the left hand side, so everything
                 // up until now should be re-inferred.
                 progress[lhs_arg_idx] = true;
                 last_lhs_progressed = lhs_arg_idx;
+            }
             progress[lhs_arg_idx + 1] = res.modified_rhs();
             last_arg_id = *next_arg_id;
             lhs_arg_idx += 1;
+        }
         // Re-infer everything. Note that we do not need to re-infer the type
         // exactly at `last_lhs_progressed`, but only everything up to it.
         let last_type: *mut _ = self.expr_types.get_mut(args.last().unwrap()).unwrap();
         for arg_idx in 0..last_lhs_progressed {
             let arg_type: *mut _ = self.expr_types.get_mut(&args[arg_idx]).unwrap();
             unsafe{
                 (*arg_type).replace_subtree(0, &(*last_type).parts);
+            }
             progress[arg_idx] = true;
+        }
         Ok(progress)
+    }
     /// Determines the `InferenceType` for the expression based on the
     /// expression parent. Note that if the parent is another expression, we do
     /// not take special action, instead we let parent expressions fix the type
     /// of subexpressions before they have a chance to call this function.
     /// Hence: if the expression type is already set, this function doesn't do
     /// anything.
@@ @@ -1486,22 +1782,12 @@ impl TypeResolvingVisitor { @@
                     unreachable!();
                 },
             EP::New(_) =>
                 // Must be a component call, which we assign a "Void" return
                 // type
                 InferenceType::new(false, true, vec![ITP::Void]),
             EP::Put(_, 0) =>
                 // TODO: Change put to be a builtin function
                 // port of "put" call
                 InferenceType::new(false, false, vec![ITP::Output, ITP::Unknown]),
             EP::Put(_, 1) =>
                 // TODO: Change put to be a builtin function
                 // message of "put" call
                 InferenceType::new(false, true, vec![ITP::Message]),
             EP::Put(_, _) =>
                 unreachable!()
         };
         match self.expr_types.entry(expr_id) {
             Entry::Vacant(vacant) => {
                 vacant.insert(inference_type);
             },
@@ @@ -1565,12 +1851,22 @@ impl TypeResolvingVisitor { @@
                 // T get<T>(input<T> arg)
+                (
                     vec![InferenceType::new(true, false, vec![ITP::Input, ITP::Marker(0), ITP::Unknown])],
                     InferenceType::new(true, false, vec![ITP::Marker(0), ITP::Unknown])
+                )
             },
             Method::Put => {
                 // void Put<T>(output<T> port, T msg)
+                (
                     vec![
                         InferenceType::new(true, false, vec![ITP::Output, ITP::Marker(0), ITP::Unknown]),
                         InferenceType::new(true, false, vec![ITP::Marker(0), ITP::Unknown])
                     ],
                     InferenceType::new(false, true, vec![ITP::Void])
+                )
+            }
             Method::Symbolic(symbolic) => {
                 let definition = &ctx.heap[symbolic.definition.unwrap()];
                 match definition {
                     Definition::Component(definition) => {
                         let mut parameter_types = Vec::with_capacity(definition.parameters.len());
@@ @@ -1660,16 +1956,17 @@ impl TypeResolvingVisitor { @@
                 PTV::Output(subtype_id) => {
                     infer_type.push(ITP::Output);
                     to_consider.push_front(*subtype_id);
                 },
                 PTV::Symbolic(symbolic) => {
                     debug_assert!(symbolic.variant.is_some(), "symbolic variant not yet determined");
                     match symbolic.variant.unwrap() {
+                    match symbolic.variant.as_ref().unwrap() {
                         SymbolicParserTypeVariant::PolyArg(_, arg_idx) => {
                             // Retrieve concrete type of argument and add it to
                             // the inference type.
                             let arg_idx = *arg_idx;
                             debug_assert!(symbolic.poly_args.is_empty()); // TODO: @hkt
                             if parser_type_in_body {
                                 debug_assert!(arg_idx < self.polyvars.len());
                                 for concrete_part in &self.polyvars[arg_idx].v {
                                     infer_type.push(ITP::from(*concrete_part));
@@ @@ -1680,23 +1977,23 @@ impl TypeResolvingVisitor { @@
                                 infer_type.push(ITP::Unknown);
+                            }
                         },
                         SymbolicParserTypeVariant::Definition(definition_id) => {
                             // TODO: @cleanup
                             if cfg!(debug_assertions) {
                                 let definition = &ctx.heap[definition_id];
+                                let definition = &ctx.heap[*definition_id];
                                 debug_assert!(definition.is_struct() || definition.is_enum()); // TODO: @function_ptrs
                                 let num_poly = match definition {
                                     Definition::Struct(v) => v.poly_vars.len(),
                                     Definition::Enum(v) => v.poly_vars.len(),
                                     _ => unreachable!(),
                                 };
                                 debug_assert_eq!(symbolic.poly_args.len(), num_poly);
+                            }
                             infer_type.push(ITP::Instance(definition_id, symbolic.poly_args.len()));
+                            infer_type.push(ITP::Instance(*definition_id, symbolic.poly_args.len()));
                             let mut poly_arg_idx = symbolic.poly_args.len();
                             while poly_arg_idx > 0 {
                                 poly_arg_idx -= 1;
                                 to_consider.push_front(symbolic.poly_args[poly_arg_idx]);
+                            }
+                        }
@@ @@ -1820,12 +2117,13 @@ impl TypeResolvingVisitor { @@
         // Helpers function to retrieve polyvar name and function name
         fn get_poly_var_and_func_name(ctx: &Ctx, poly_var_idx: usize, expr: &CallExpression) -> (String, String) {
             match &expr.method {
                 Method::Create => unreachable!(),
                 Method::Fires => (String::from('T'), String::from("fires")),
                 Method::Get => (String::from('T'), String::from("get")),
                 Method::Put => (String::from('T'), String::from("put")),
                 Method::Symbolic(symbolic) => {
                     let definition = &ctx.heap[symbolic.definition.unwrap()];
                     let poly_var = match definition {
                         Definition::Struct(_) | Definition::Enum(_) => unreachable!(),
                         Definition::Function(definition) => {
                             String::from_utf8_lossy(&definition.poly_vars[poly_var_idx].value).to_string()

src/protocol/parser/type_table.rs

➞

Show inline comments

@@ @@ -178,14 +178,14 @@ pub struct StructType { @@
 pub struct StructField {
     identifier: Identifier,
     parser_type: ParserTypeId,
+}
 pub struct FunctionType {
     return_type: ParserTypeId,
     arguments: Vec<FunctionArgument>
     pub return_type: ParserTypeId,
     pub arguments: Vec<FunctionArgument>
+}
 pub struct ComponentType {
     variant: ComponentVariant,
     arguments: Vec<FunctionArgument>
+}
@@ @@ -638,13 +638,14 @@ impl TypeTable { @@
             ctx, root_id, &arguments, |arg| &arg.identifier, "function argument"
         )?;
         self.check_poly_args_collision(ctx, root_id, &definition.poly_vars)?;
         // Construct polymorphic arguments
         let mut poly_args = self.create_initial_poly_args(&definition.poly_vars);
         self.check_and_resolve_embedded_type_and_modify_poly_args(ctx, definition_id, &mut poly_args, root_id, definition.return_type)?;
         let return_type_id = definition.return_type;
         self.check_and_resolve_embedded_type_and_modify_poly_args(ctx, definition_id, &mut poly_args, root_id, return_type_id)?;
         for argument in &arguments {
             self.check_and_resolve_embedded_type_and_modify_poly_args(ctx, definition_id, &mut poly_args, root_id, argument.parser_type)?;
+        }
         let is_polymorph = poly_args.iter().any(|arg| arg.is_in_use);

src/protocol/parser/visitor.rs

➞

Show inline comments

@@ @@ -131,16 +131,12 @@ pub(crate) trait Visitor2 { @@
                 self.visit_goto_stmt(ctx, this)
             },
             Statement::New(stmt) => {
                 let this = stmt.this;
                 self.visit_new_stmt(ctx, this)
             },
             Statement::Put(stmt) => {
                 let this = stmt.this;
                 self.visit_put_stmt(ctx, this)
             },
             Statement::Expression(stmt) => {
                 let this = stmt.this;
                 self.visit_expr_stmt(ctx, this)
+            }
+        }
+    }
@@ @@ -170,13 +166,12 @@ pub(crate) trait Visitor2 { @@
     fn visit_continue_stmt(&mut self, _ctx: &mut Ctx, _id: ContinueStatementId) -> VisitorResult { Ok(()) }
     fn visit_synchronous_stmt(&mut self, _ctx: &mut Ctx, _id: SynchronousStatementId) -> VisitorResult { Ok(()) }
     fn visit_return_stmt(&mut self, _ctx: &mut Ctx, _id: ReturnStatementId) -> VisitorResult { Ok(()) }
     fn visit_assert_stmt(&mut self, _ctx: &mut Ctx, _id: AssertStatementId) -> VisitorResult { Ok(()) }
     fn visit_goto_stmt(&mut self, _ctx: &mut Ctx, _id: GotoStatementId) -> VisitorResult { Ok(()) }
     fn visit_new_stmt(&mut self, _ctx: &mut Ctx, _id: NewStatementId) -> VisitorResult { Ok(()) }
     fn visit_put_stmt(&mut self, _ctx: &mut Ctx, _id: PutStatementId) -> VisitorResult { Ok(()) }
     fn visit_expr_stmt(&mut self, _ctx: &mut Ctx, _id: ExpressionStatementId) -> VisitorResult { Ok(()) }
     // Expressions
     // --- enum matching
     fn visit_expr(&mut self, ctx: &mut Ctx, id: ExpressionId) -> VisitorResult {
         match &ctx.heap[id] {

src/protocol/parser/visitor_linker.rs

➞

Show inline comments

@@ @@ -558,38 +558,12 @@ impl Visitor2 for ValidityAndLinkerVisitor { @@
             self.expr_parent = old_expr_parent;
+        }
         Ok(())
+    }
     fn visit_put_stmt(&mut self, ctx: &mut Ctx, id: PutStatementId) -> VisitorResult {
         // TODO: Make `put` an expression. Perhaps silly, but much easier to
         //  perform typechecking
         if self.performing_breadth_pass {
             let put_stmt = &ctx.heap[id];
             if self.in_sync.is_none() {
                 return Err(ParseError2::new_error(
                     &ctx.module.source, put_stmt.position, "Put must be called in a synchronous block"
                 ));
+            }
         } else {
             let put_stmt = &ctx.heap[id];
             let port = put_stmt.port;
             let message = put_stmt.message;
             debug_assert_eq!(self.expr_parent, ExpressionParent::None);
             self.expr_parent = ExpressionParent::Put(id, 0);
             self.visit_expr(ctx, port)?;
             self.expr_parent = ExpressionParent::Put(id, 1);
             self.visit_expr(ctx, message)?;
             self.expr_parent = ExpressionParent::None;
+        }
         Ok(())
+    }
     fn visit_expr_stmt(&mut self, ctx: &mut Ctx, id: ExpressionStatementId) -> VisitorResult {
         if !self.performing_breadth_pass {
             let expr_id = ctx.heap[id].expression;
             debug_assert_eq!(self.expr_parent, ExpressionParent::None);
             self.expr_parent = ExpressionParent::ExpressionStmt(id);
@@ @@ -776,40 +750,68 @@ impl Visitor2 for ValidityAndLinkerVisitor { @@
+    }
     fn visit_call_expr(&mut self, ctx: &mut Ctx, id: CallExpressionId) -> VisitorResult {
         debug_assert!(!self.performing_breadth_pass);
         let call_expr = &mut ctx.heap[id];
         let num_expr_args = call_expr.arguments.len();
         // Resolve the method to the appropriate definition and check the
         // legality of the particular method call.
         // TODO: @cleanup Unify in some kind of signature call, see similar
         //  cleanup comments with this `match` format.
-        let num_args;
+        let num_definition_args;
         match &mut call_expr.method {
             Method::Create => {
-                num_args = 1;
+                num_definition_args = 1;
             },
             Method::Fires => {
                 if !self.def_type.is_primitive() {
                     return Err(ParseError2::new_error(
                         &ctx.module.source, call_expr.position,
                         "A call to 'fires' may only occur in primitive component definitions"
                     ));
+                }
                 num_args = 1;
                 if self.in_sync.is_none() {
                     return Err(ParseError2::new_error(
                         &ctx.module.source, call_expr.position,
                         "A call to 'fires' may only occur inside synchronous blocks"
                     ));
+                }
                 num_definition_args = 1;
             },
             Method::Get => {
                 if !self.def_type.is_primitive() {
                     return Err(ParseError2::new_error(
                         &ctx.module.source, call_expr.position,
                         "A call to 'get' may only occur in primitive component definitions"
                     ));
+                }
                 num_args = 1;
                 if self.in_sync.is_none() {
                     return Err(ParseError2::new_error(
                         &ctx.module.source, call_expr.position,
                         "A call to 'get' may only occur inside synchronous blocks"
                     ));
+                }
                 num_definition_args = 1;
             },
             Method::Put => {
                 if !self.def_type.is_primitive() {
                     return Err(ParseError2::new_error(
                         &ctx.module.source, call_expr.position,
                         "A call to 'put' may only occur in primitive component definitions"
                     ));
+                }
                 if self.in_sync.is_none() {
                     return Err(ParseError2::new_error(
                         &ctx.module.source, call_expr.position,
                         "A call to 'put' may only occur inside synchronous blocks"
                     ));
+                }
                 num_definition_args = 2;
+            }
             Method::Symbolic(symbolic) => {
                 // Find symbolic method
                 let found_symbol = self.find_symbol_of_type(
                     ctx.module.root_id, &ctx.symbols, &ctx.types,
                     &symbolic.identifier, TypeClass::Function
                 );
@@ @@ -827,36 +829,36 @@ impl Visitor2 for ValidityAndLinkerVisitor { @@
                             &format!("Could not find a function with this name")
                         ))
+                    }
                 };
                 symbolic.definition = Some(definition_id);
                 match ctx.types.get_base_definition(&definition_id).unwrap() {
                     Definition::Function(definition) => {
                         num_args = definition.parameters.len();
                 match &ctx.types.get_base_definition(&definition_id).unwrap().definition {
                     DefinedTypeVariant::Function(definition) => {
                         num_definition_args = definition.arguments.len();
                     },
                     _ => unreachable!(),
+                }
+            }
+        }
         // Check the poly args and the number of variables in the call
         // expression
         self.visit_call_poly_args(ctx, id)?;
         if call_expr.arguments.len() != num_args {
         let call_expr = &mut ctx.heap[id];
         if num_expr_args != num_definition_args {
             return Err(ParseError2::new_error(
                 &ctx.module.source, call_expr.position,
                 &format!(
                     "This call expects {} arguments, but {} were provided",
-                    num_args, call_expr.arguments.len()
+                    num_definition_args, num_expr_args
+                )
             ));
+        }
         // Recurse into all of the arguments and set the expression's parent
         let call_expr = &mut ctx.heap[id];
         let upcast_id = id.upcast();
         let old_num_exprs = self.expression_buffer.len();
         self.expression_buffer.extend(&call_expr.arguments);
         let new_num_exprs = self.expression_buffer.len();
@@ @@ -1475,12 +1477,15 @@ impl ValidityAndLinkerVisitor { @@
             Method::Fires => {
             },
             Method::Get => {
             },
             Method::Put => {
+            }
             Method::Symbolic(symbolic) => {
                 let definition = &ctx.heap[symbolic.definition.unwrap()];
                 if let Definition::Function(definition) = definition {
                     definition.poly_vars.len()
                 } else {
                     debug_assert!(false, "expected function while visiting call poly args");

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