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https://github.com/carbon-language/carbon-lang.git
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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.
72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/check/context.h"
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#include "toolchain/check/convert.h"
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#include "toolchain/sem_ir/node.h"
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namespace Carbon::Check {
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auto HandleVariableDeclaration(Context& context, Parse::Node parse_node)
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-> bool {
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// Handle the optional initializer.
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auto init_id = SemIR::NodeId::Invalid;
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bool has_init =
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context.parse_tree().node_kind(context.node_stack().PeekParseNode()) !=
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Parse::NodeKind::PatternBinding;
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if (has_init) {
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init_id = context.node_stack().PopExpression();
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context.node_stack()
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.PopAndDiscardSoloParseNode<Parse::NodeKind::VariableInitializer>();
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}
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// Extract the name binding.
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SemIR::NodeId bind_name_id =
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context.node_stack().Pop<Parse::NodeKind::PatternBinding>();
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auto bind_name = context.nodes().GetAs<SemIR::BindName>(bind_name_id);
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// Form a corresponding name in the current context, and bind the name to the
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// variable.
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context.declaration_name_stack().AddNameToLookup(
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context.declaration_name_stack().MakeUnqualifiedName(bind_name.parse_node,
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bind_name.name_id),
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bind_name_id);
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// If there was an initializer, assign it to the storage.
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if (has_init) {
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auto var_id = bind_name.value_id;
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if (context.nodes().Get(var_id).Is<SemIR::VarStorage>()) {
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init_id = Initialize(context, parse_node, var_id, init_id);
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// TODO: Consider using different node kinds for assignment versus
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// initialization.
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context.AddNode(SemIR::Assign{parse_node, var_id, init_id});
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} else {
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// TODO: In a class scope, we should instead save the initializer
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// somewhere so that we can use it as a default.
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context.TODO(parse_node, "Field initializer");
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}
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}
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context.node_stack()
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.PopAndDiscardSoloParseNode<Parse::NodeKind::VariableIntroducer>();
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return true;
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}
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auto HandleVariableIntroducer(Context& context, Parse::Node parse_node)
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-> bool {
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// No action, just a bracketing node.
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context.node_stack().Push(parse_node);
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return true;
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}
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auto HandleVariableInitializer(Context& context, Parse::Node parse_node)
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-> bool {
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// No action, just a bracketing node.
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context.node_stack().Push(parse_node);
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return true;
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}
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} // namespace Carbon::Check
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