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Implement static name resolution (#958)

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This doesn't actually use the results of name resolution, but it does verify that they are present.
Also ensures that name resolution and type checking are applied to deduced function parameters and the implicit call to `Main()`.

Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
This commit is contained in:
Geoff Romer
2021-11-30 13:33:54 -08:00
committed by GitHub
co-authored by Jon Meow
parent dc5e62fc7a
commit 17e0a1afb9
12 changed files with 347 additions and 22 deletions
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executable_semantics/interpreter/interpreter.cpp
+6
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@@ -302,6 +302,9 @@ void Interpreter::StepLvalue() {
case ExpressionKind::IdentifierExpression: {
// { {x :: C, E, F} :: S, H}
// -> { {E(x) :: C, E, F} :: S, H}
CHECK(cast<IdentifierExpression>(exp).has_named_entity())
<< "Identifier '" << exp << "' at " << exp.source_loc()
<< " was not resolved";
Address pointer =
GetFromEnv(exp.source_loc(), cast<IdentifierExpression>(exp).name());
Nonnull<const Value*> v = arena_->New<LValue>(pointer);
@@ -512,6 +515,9 @@ void Interpreter::StepExp() {
case ExpressionKind::IdentifierExpression: {
CHECK(act.pos() == 0);
const auto& ident = cast<IdentifierExpression>(exp);
CHECK(ident.has_named_entity())
<< "Identifier '" << exp << "' at " << exp.source_loc()
<< " was not resolved";
// { {x :: C, E, F} :: S, H} -> { {H(E(x)) :: C, E, F} :: S, H}
Address pointer = GetFromEnv(exp.source_loc(), ident.name());
return todo_.FinishAction(heap_.Read(pointer, exp.source_loc()));