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Jon Ross-PerkinsandDana Jansens
8166f9a7cf
This turns `Cpp` into a keyword, and makes it map to `NameId::Cpp` and `PackageNameId::Cpp`. Per discussion with zygoloid, the keyword versus identifier question is deliberately kept open by #4846. This PR switches to a keyword because mapping to a specific `PackageNameId` works best with a special `NameId` not backed by an `IdentifierId`. We could in theory make it work using `IdentifierId` or a runtime-tracked `PackageNameId` for `Cpp` (e.g. stored on `SemIR::File`), but this approach is consistent with `Core` and so seemed like a good starting point. --------- Co-authored-by: Dana Jansens <danakj@orodu.net>
67 lines
2.3 KiB
C++
67 lines
2.3 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/sem_ir/name.h"
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#include "llvm/ADT/StringSwitch.h"
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namespace Carbon::SemIR {
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// Get the spelling to use for a special name.
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static auto GetSpecialName(NameId name_id, bool for_ir) -> llvm::StringRef {
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if (name_id == NameId::None) {
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return for_ir ? "" : "<none>";
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}
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auto special_name_id = name_id.AsSpecialNameId();
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CARBON_CHECK(special_name_id, "Not a special name");
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switch (*special_name_id) {
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case NameId::SpecialNameId::Base:
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return "base";
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case NameId::SpecialNameId::ChoiceDiscriminant:
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return "discriminant";
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case NameId::SpecialNameId::Core:
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return "Core";
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case NameId::SpecialNameId::Cpp:
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return "Cpp";
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case NameId::SpecialNameId::PackageNamespace:
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return "package";
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case NameId::SpecialNameId::PeriodSelf:
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return ".Self";
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case NameId::SpecialNameId::ReturnSlot:
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return for_ir ? "return" : "<return slot>";
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case NameId::SpecialNameId::SelfType:
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return "Self";
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case NameId::SpecialNameId::SelfValue:
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return "self";
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case NameId::SpecialNameId::Underscore:
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return "_";
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case NameId::SpecialNameId::Vptr:
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return for_ir ? "vptr" : "<vptr>";
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case NameId::SpecialNameId::CppOperator:
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return for_ir ? "cpp_operator" : "<C++ operator>";
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}
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}
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auto NameStoreWrapper::GetFormatted(NameId name_id) const -> llvm::StringRef {
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// If the name is an identifier name with a keyword spelling, format it with
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// an `r#` prefix. Format any other identifier name as just the identifier.
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if (auto string_name = GetAsStringIfIdentifier(name_id)) {
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return llvm::StringSwitch<llvm::StringRef>(*string_name)
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#define CARBON_KEYWORD_TOKEN(Name, Spelling) .Case(Spelling, "r#" Spelling)
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#include "toolchain/lex/token_kind.def"
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.Default(*string_name);
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}
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return GetSpecialName(name_id, /*for_ir=*/false);
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}
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auto NameStoreWrapper::GetIRBaseName(NameId name_id) const -> llvm::StringRef {
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if (auto string_name = GetAsStringIfIdentifier(name_id)) {
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return *string_name;
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}
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return GetSpecialName(name_id, /*for_ir=*/true);
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}
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} // namespace Carbon::SemIR
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