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interfaces, impls, and constrained generics (basics) (#1073)

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* interfaces, impls, and constrained generics (basics)

* separate type checking into declare vs. type check, removing redundancy

* external impls

* added impl scopes to handle generics calling generics

* cleanup

* more cleanup

* Update executable_semantics/testdata/interface/external_impl_point_vector.carbon

Co-authored-by: josh11b <josh11b@users.noreply.github.com>

* Update executable_semantics/testdata/interface/generic_call_generic.carbon

Co-authored-by: josh11b <josh11b@users.noreply.github.com>

* Update executable_semantics/testdata/interface/tuple_vector_add_scale.carbon

Co-authored-by: josh11b <josh11b@users.noreply.github.com>

* Update executable_semantics/testdata/interface/vector_point_add_scale.carbon

Co-authored-by: josh11b <josh11b@users.noreply.github.com>

* change ImplementationDeclaration to ImplDeclaration

* remove impl_type_value

* split NamedEntity into two

* changed GetName to be a free function

* adding comments

* more edits to respond to review

* introduce ImplBinding, remove punning on GenericBinding

* new test case and some minor edits

* refactor GetMember and GetField to move impl logic to interpreter

* remove commennt

* change EntityView to ImplBinding in FieldAccess...

* move ImplBinding

* review response

* added example to impl_scope.h

* minor edits

* Update executable_semantics/interpreter/field_path.h

Co-authored-by: Geoff Romer <gromer@google.com>

* Update executable_semantics/interpreter/value.cpp

Co-authored-by: Geoff Romer <gromer@google.com>

* Update executable_semantics/interpreter/interpreter.cpp

Co-authored-by: Geoff Romer <gromer@google.com>

* Update executable_semantics/ast/expression.h

Co-authored-by: Geoff Romer <gromer@google.com>

* Update executable_semantics/ast/expression.h

Co-authored-by: Geoff Romer <gromer@google.com>

* Update executable_semantics/ast/generic_binding.h

Co-authored-by: Geoff Romer <gromer@google.com>

* more edits from review

* review response

* Update executable_semantics/ast/static_scope.h

Co-authored-by: Geoff Romer <gromer@google.com>

* remove ImplType, renamed node_view to value_node

Co-authored-by: josh11b <josh11b@users.noreply.github.com>
Co-authored-by: Geoff Romer <gromer@google.com>
This commit is contained in:
Jeremy G. Siek
2022-03-02 15:58:45 -05:00
committed by GitHub
co-authored by josh11b Geoff Romer
parent 8f6e42d866
commit 7cce1bd124
43 changed files with 1722 additions and 441 deletions
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executable_semantics/interpreter/action_stack.cpp
+10 -10
View File
@@ -36,47 +36,47 @@ void ActionStack::Start(std::unique_ptr<Action> action) {
todo_.Push(std::move(action));
}
void ActionStack::Initialize(NamedEntityView named_entity,
void ActionStack::Initialize(ValueNodeView value_node,
Nonnull<const Value*> value) {
for (const std::unique_ptr<Action>& action : todo_) {
if (action->scope().has_value()) {
action->scope()->Initialize(named_entity, value);
action->scope()->Initialize(value_node, value);
return;
}
}
globals_->Initialize(named_entity, value);
globals_->Initialize(value_node, value);
}
auto ActionStack::ValueOfName(NamedEntityView named_entity,
auto ActionStack::ValueOfNode(ValueNodeView value_node,
SourceLocation source_loc) const
-> Nonnull<const Value*> {
if (std::optional<Nonnull<const Value*>> constant_value =
named_entity.constant_value();
value_node.constant_value();
constant_value.has_value()) {
return *constant_value;
}
for (const std::unique_ptr<Action>& action : todo_) {
// TODO: have static name resolution identify the scope of named_entity
// TODO: have static name resolution identify the scope of value_node
// as an AstNode, and then perform lookup _only_ on the Action associated
// with that node. This will help keep unwanted dynamic-scoping behavior
// from sneaking in.
if (action->scope().has_value()) {
std::optional<Nonnull<const Value*>> result =
action->scope()->Get(named_entity);
action->scope()->Get(value_node);
if (result.has_value()) {
return *result;
}
}
}
if (globals_.has_value()) {
std::optional<Nonnull<const Value*>> result = globals_->Get(named_entity);
std::optional<Nonnull<const Value*>> result = globals_->Get(value_node);
if (result.has_value()) {
return *result;
}
}
// TODO: Move these errors to compile time and explain them more clearly.
// TODO: Move these errors to name resolution and explain them more clearly.
FATAL_RUNTIME_ERROR(source_loc)
<< "could not find `" << named_entity.name() << "`";
<< "could not find `" << value_node.base() << "`";
}
void ActionStack::MergeScope(RuntimeScope scope) {