mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-11-15 19:28:10 +00:00
Geoff Romer
b8d4e2f41b
- Rename `PatternBinding` to `BindingPattern`. - Use `BindingPattern` rather than `Pattern` in the names of binding-pattern-specific parse states.
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
|
|
// 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/inst.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto HandleLetDecl(Context& context, Parse::NodeId parse_node) -> bool {
|
|
auto value_id = context.node_stack().PopExpr();
|
|
SemIR::InstId pattern_id =
|
|
context.node_stack().Pop<Parse::NodeKind::BindingPattern>();
|
|
context.node_stack()
|
|
.PopAndDiscardSoloParseNode<Parse::NodeKind::LetIntroducer>();
|
|
|
|
// Convert the value to match the type of the pattern.
|
|
auto pattern = context.insts().Get(pattern_id);
|
|
value_id =
|
|
ConvertToValueOfType(context, parse_node, value_id, pattern.type_id());
|
|
|
|
// Update the binding with its value and add it to the current block, after
|
|
// the computation of the value.
|
|
// TODO: Support other kinds of pattern here.
|
|
auto bind_name = pattern.As<SemIR::BindName>();
|
|
CARBON_CHECK(!bind_name.value_id.is_valid())
|
|
<< "Binding should not already have a value!";
|
|
bind_name.value_id = value_id;
|
|
context.insts().Set(pattern_id, bind_name);
|
|
context.inst_block_stack().AddInstId(pattern_id);
|
|
|
|
// Add the name of the binding to the current scope.
|
|
context.AddNameToLookup(pattern.parse_node(), bind_name.name_id, pattern_id);
|
|
return true;
|
|
}
|
|
|
|
auto HandleLetIntroducer(Context& context, Parse::NodeId parse_node) -> bool {
|
|
// Push a bracketing node to establish the pattern context.
|
|
context.node_stack().Push(parse_node);
|
|
return true;
|
|
}
|
|
|
|
auto HandleLetInitializer(Context& /*context*/, Parse::NodeId /*parse_node*/)
|
|
-> bool {
|
|
return true;
|
|
}
|
|
|
|
} // namespace Carbon::Check
|