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Jon Ross-Perkins
239cdcc457
I was running into some difficult merges in #2940, so I'm wanting to finish splitting this last file to minimize the chance of future issues.
61 lines
2.2 KiB
C++
61 lines
2.2 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/semantics/semantics_context.h"
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#include "toolchain/semantics/semantics_node.h"
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namespace Carbon {
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auto SemanticsHandleVariableDeclaration(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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// Handle the optional initializer.
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auto expr_node_id = SemanticsNodeId::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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ParseNodeKind::PatternBinding;
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if (has_init) {
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expr_node_id = context.node_stack().Pop<SemanticsNodeId>();
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context.node_stack().PopAndDiscardSoloParseNode(
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ParseNodeKind::VariableInitializer);
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}
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// Get the storage and add it to name lookup.
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auto binding_id =
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context.node_stack().Pop<SemanticsNodeId>(ParseNodeKind::PatternBinding);
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auto binding = context.semantics_ir().GetNode(binding_id);
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auto [name_id, storage_id] = binding.GetAsBindName();
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context.AddNameToLookup(binding.parse_node(), name_id, storage_id);
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// If there was an initializer, assign it to storage.
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if (has_init) {
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auto cast_value_id = context.ImplicitAsRequired(
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parse_node, expr_node_id,
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context.semantics_ir().GetNode(storage_id).type_id());
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context.AddNode(SemanticsNode::Assign::Make(
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parse_node, context.semantics_ir().GetNode(cast_value_id).type_id(),
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storage_id, cast_value_id));
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}
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context.node_stack().PopAndDiscardSoloParseNode(
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ParseNodeKind::VariableIntroducer);
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return true;
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}
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auto SemanticsHandleVariableIntroducer(SemanticsContext& context,
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ParseTree::Node parse_node) -> 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 SemanticsHandleVariableInitializer(SemanticsContext& context,
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ParseTree::Node parse_node) -> 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
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