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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/ast/declaration.cpp
+44
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@@ -15,6 +15,32 @@ Declaration::~Declaration() = default;
void Declaration::Print(llvm::raw_ostream& out) const {
switch (kind()) {
case DeclarationKind::InterfaceDeclaration: {
const auto& iface_decl = cast<InterfaceDeclaration>(*this);
out << "interface " << iface_decl.name() << " {\n";
for (Nonnull<Declaration*> m : iface_decl.members()) {
out << *m;
}
out << "}\n";
break;
}
case DeclarationKind::ImplDeclaration: {
const auto& impl_decl = cast<ImplDeclaration>(*this);
switch (impl_decl.kind()) {
case ImplKind::InternalImpl:
break;
case ImplKind::ExternalImpl:
out << "external ";
break;
}
out << "impl " << *impl_decl.impl_type() << " as "
<< impl_decl.interface() << " {\n";
for (Nonnull<Declaration*> m : impl_decl.members()) {
out << *m;
}
out << "}\n";
break;
}
case DeclarationKind::FunctionDeclaration:
cast<FunctionDeclaration>(*this).PrintDepth(-1, out);
break;
@@ -51,6 +77,23 @@ void Declaration::Print(llvm::raw_ostream& out) const {
}
}
auto GetName(const Declaration& declaration) -> std::optional<std::string> {
switch (declaration.kind()) {
case DeclarationKind::FunctionDeclaration:
return cast<FunctionDeclaration>(declaration).name();
case DeclarationKind::ClassDeclaration:
return cast<ClassDeclaration>(declaration).name();
case DeclarationKind::ChoiceDeclaration:
return cast<ChoiceDeclaration>(declaration).name();
case DeclarationKind::InterfaceDeclaration:
return cast<InterfaceDeclaration>(declaration).name();
case DeclarationKind::VariableDeclaration:
return cast<VariableDeclaration>(declaration).binding().name();
case DeclarationKind::ImplDeclaration:
return std::nullopt;
}
}
void GenericBinding::Print(llvm::raw_ostream& out) const {
out << name() << ":! " << type();
}
@@ -63,6 +106,7 @@ void ReturnTerm::Print(llvm::raw_ostream& out) const {
out << "-> auto";
return;
case ReturnKind::Expression:
CHECK(type_expression_.has_value());
out << "-> " << **type_expression_;
return;
}