mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-29 08:04:55 +01:00
Richard Smith
7f2f4bec4f
This replaces the use of `VarStorage` in this case. Add an `UnboundFieldType` type as the type of a field, in cases where it's referenced without an accompanying object. Add a `BindName` node to describe the name binding performed for both variables and fields so that we can handle them more uniformly.
111 lines
4.4 KiB
C++
111 lines
4.4 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#include "toolchain/check/context.h"
|
|
#include "toolchain/check/convert.h"
|
|
#include "toolchain/sem_ir/node.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto HandleAddress(Context& context, Parse::Node parse_node) -> bool {
|
|
return context.TODO(parse_node, "HandleAddress");
|
|
}
|
|
|
|
auto HandleGenericPatternBinding(Context& context, Parse::Node parse_node)
|
|
-> bool {
|
|
return context.TODO(parse_node, "GenericPatternBinding");
|
|
}
|
|
|
|
auto HandlePatternBinding(Context& context, Parse::Node parse_node) -> bool {
|
|
auto [type_node, parsed_type_id] =
|
|
context.node_stack().PopExpressionWithParseNode();
|
|
auto type_node_copy = type_node;
|
|
auto cast_type_id = ExpressionAsType(context, type_node, parsed_type_id);
|
|
|
|
// Get the name.
|
|
auto [name_node, name_id] =
|
|
context.node_stack().PopWithParseNode<Parse::NodeKind::Name>();
|
|
|
|
// Allocate a node of the appropriate kind, linked to the name for error
|
|
// locations.
|
|
switch (auto context_parse_node_kind = context.parse_tree().node_kind(
|
|
context.node_stack().PeekParseNode())) {
|
|
case Parse::NodeKind::VariableIntroducer: {
|
|
// A `var` declaration at class scope introduces a field.
|
|
auto enclosing_class_decl =
|
|
context.GetCurrentScopeAs<SemIR::ClassDeclaration>();
|
|
if (!context.TryToCompleteType(cast_type_id, [&] {
|
|
CARBON_DIAGNOSTIC(IncompleteTypeInVarDeclaration, Error,
|
|
"{0} has incomplete type `{1}`.", llvm::StringRef,
|
|
std::string);
|
|
return context.emitter().Build(
|
|
type_node_copy, IncompleteTypeInVarDeclaration,
|
|
enclosing_class_decl ? "Field" : "Variable",
|
|
context.sem_ir().StringifyType(cast_type_id, true));
|
|
})) {
|
|
cast_type_id = SemIR::TypeId::Error;
|
|
}
|
|
SemIR::NodeId value_id = SemIR::NodeId::Invalid;
|
|
SemIR::TypeId value_type_id = cast_type_id;
|
|
if (enclosing_class_decl) {
|
|
auto& class_info =
|
|
context.classes().Get(enclosing_class_decl->class_id);
|
|
auto field_type_node_id = context.AddNode(SemIR::UnboundFieldType{
|
|
parse_node, context.GetBuiltinType(SemIR::BuiltinKind::TypeType),
|
|
class_info.self_type_id, cast_type_id});
|
|
value_type_id = context.CanonicalizeType(field_type_node_id);
|
|
value_id =
|
|
context.AddNode(SemIR::Field{parse_node, value_type_id, name_id});
|
|
} else {
|
|
value_id = context.AddNode(
|
|
SemIR::VarStorage{name_node, value_type_id, name_id});
|
|
}
|
|
context.AddNodeAndPush(
|
|
parse_node,
|
|
SemIR::BindName{name_node, value_type_id, name_id, value_id});
|
|
break;
|
|
}
|
|
|
|
case Parse::NodeKind::ParameterListStart:
|
|
// Parameters can have incomplete types in a function declaration, but not
|
|
// in a function definition. We don't know which kind we have here.
|
|
context.AddNodeAndPush(
|
|
parse_node, SemIR::Parameter{name_node, cast_type_id, name_id});
|
|
// TODO: Create a `BindName` node.
|
|
break;
|
|
|
|
case Parse::NodeKind::LetIntroducer:
|
|
if (!context.TryToCompleteType(cast_type_id, [&] {
|
|
CARBON_DIAGNOSTIC(IncompleteTypeInLetDeclaration, Error,
|
|
"`let` binding has incomplete type `{0}`.",
|
|
std::string);
|
|
return context.emitter().Build(
|
|
type_node_copy, IncompleteTypeInLetDeclaration,
|
|
context.sem_ir().StringifyType(cast_type_id, true));
|
|
})) {
|
|
cast_type_id = SemIR::TypeId::Error;
|
|
}
|
|
// Create the node, but don't add it to a block until after we've formed
|
|
// its initializer.
|
|
// TODO: For general pattern parsing, we'll need to create a block to hold
|
|
// the `let` pattern before we see the initializer.
|
|
context.node_stack().Push(
|
|
parse_node,
|
|
context.nodes().AddInNoBlock(SemIR::BindName{
|
|
name_node, cast_type_id, name_id, SemIR::NodeId::Invalid}));
|
|
break;
|
|
|
|
default:
|
|
CARBON_FATAL() << "Found a pattern binding in unexpected context "
|
|
<< context_parse_node_kind;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
auto HandleTemplate(Context& context, Parse::Node parse_node) -> bool {
|
|
return context.TODO(parse_node, "HandleTemplate");
|
|
}
|
|
|
|
} // namespace Carbon::Check
|