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https://github.com/carbon-language/carbon-lang.git
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josh11b
5020fdb3be
Part of switching to the [abbreviations we've decided to use](https://docs.google.com/document/d/1RRYMm42osyqhI2LyjrjockYCutQ5dOf8Abu50kTrkX0/edit?resourcekey=0-kHyqOESbOHmzZphUbtLrTw#heading=h.pph7i5m5un7q). I will rename files in a follow-up PR.
50 lines
1.7 KiB
C++
50 lines
1.7 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/inst.h"
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namespace Carbon::Check {
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auto HandleLetDecl(Context& context, Parse::Node parse_node) -> bool {
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auto value_id = context.node_stack().PopExpr();
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SemIR::InstId pattern_id =
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context.node_stack().Pop<Parse::NodeKind::PatternBinding>();
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context.node_stack()
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.PopAndDiscardSoloParseNode<Parse::NodeKind::LetIntroducer>();
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// Convert the value to match the type of the pattern.
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auto pattern = context.insts().Get(pattern_id);
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value_id =
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ConvertToValueOfType(context, parse_node, value_id, pattern.type_id());
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// Update the binding with its value and add it to the current block, after
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// the computation of the value.
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// TODO: Support other kinds of pattern here.
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auto bind_name = pattern.As<SemIR::BindName>();
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CARBON_CHECK(!bind_name.value_id.is_valid())
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<< "Binding should not already have a value!";
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bind_name.value_id = value_id;
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context.insts().Set(pattern_id, bind_name);
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context.inst_block_stack().AddInstId(pattern_id);
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// Add the name of the binding to the current scope.
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context.AddNameToLookup(pattern.parse_node(), bind_name.name_id, pattern_id);
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return true;
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}
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auto HandleLetIntroducer(Context& context, Parse::Node parse_node) -> bool {
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// Push a bracketing node to establish the pattern context.
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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 HandleLetInitializer(Context& /*context*/, Parse::Node /*parse_node*/)
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-> bool {
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return true;
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}
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} // namespace Carbon::Check
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