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https://github.com/carbon-language/carbon-lang.git
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CJ Johnson
d0e8afc51b
This change implements the check behavior for the arrow operator. `ptr->Foo()` is rewritten as `(*ptr).Foo()` and `ptr->(X.y)` is rewritten as `(*ptr).(X.y)`
32 lines
1.1 KiB
C++
32 lines
1.1 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 "llvm/ADT/STLFunctionalExtras.h"
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#include "toolchain/check/context.h"
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#include "toolchain/check/convert.h"
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#include "toolchain/parse/node_ids.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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auto PerformPointerDereference(
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Context& context, Parse::AnyPointerDeferenceExprId node_id,
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SemIR::InstId base_id,
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llvm::function_ref<auto(SemIR::TypeId not_pointer_type_id)->void>
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diagnose_not_pointer) -> SemIR::InstId {
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base_id = ConvertToValueExpr(context, base_id);
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auto type_id =
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context.GetUnqualifiedType(context.insts().Get(base_id).type_id());
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auto result_type_id = SemIR::TypeId::Error;
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if (auto pointer_type =
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context.types().TryGetAs<SemIR::PointerType>(type_id)) {
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result_type_id = pointer_type->pointee_id;
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} else if (type_id != SemIR::TypeId::Error) {
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diagnose_not_pointer(type_id);
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}
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return context.AddInst({node_id, SemIR::Deref{result_type_id, base_id}});
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}
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} // namespace Carbon::Check
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