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Jon Ross-Perkins
c0b335b87f
I'm doing this because I figured it'd be an incremental improvement for all the operator lookups that we do. Even to the extent that we've discussed witness caching, I think it'll still apply. It does add one more step to adding new interfaces (before, you'd just write the string, now you add it to the def file and reference it). I'll claim it makes GetClangOperatorKind a lot friendlier to read/edit, nevermind removing the string comparisons. :)
75 lines
2.4 KiB
C++
75 lines
2.4 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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#ifndef CARBON_TOOLCHAIN_CHECK_CORE_IDENTIFIER_H_
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#define CARBON_TOOLCHAIN_CHECK_CORE_IDENTIFIER_H_
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#include "common/enum_base.h"
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#include "toolchain/base/shared_value_stores.h"
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#include "toolchain/base/value_ids.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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CARBON_DEFINE_RAW_ENUM_CLASS(CoreIdentifier, uint8_t) {
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#define CARBON_CORE_IDENTIFIER(Name) CARBON_RAW_ENUM_ENUMERATOR(Name)
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#include "toolchain/check/core_identifier.def"
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};
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// An identifier in `Core` that's significant for the language (typically used
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// by desugaring) but not a builtin or keyword. Note this includes non-top-level
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// identifiers, such as both `AddWith` and `Op` in `Core.AddWith.Op`.
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class CoreIdentifier : public CARBON_ENUM_BASE(CoreIdentifier) {
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public:
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#define CARBON_CORE_IDENTIFIER(Name) CARBON_ENUM_CONSTANT_DECL(Name)
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#include "toolchain/check/core_identifier.def"
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private:
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// Exposes `AsInt`.
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friend class CoreIdentifierCache;
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};
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#define CARBON_CORE_IDENTIFIER(Name) \
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CARBON_ENUM_CONSTANT_DEFINITION(CoreIdentifier, Name)
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#include "toolchain/check/core_identifier.def"
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// A cache of added `Core` identifiers. These are added to the identifier
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// store on first use.
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class CoreIdentifierCache {
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public:
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explicit CoreIdentifierCache(SharedValueStores::IdentifierStore* identifiers)
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: identifiers_(identifiers) {}
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// Returns the `NameId` for a `CoreIdentifier`.
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auto AddNameId(CoreIdentifier identifier) -> SemIR::NameId {
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auto& value = cache_[identifier.AsInt()];
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if (!value.has_value()) {
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value =
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SemIR::NameId::ForIdentifier(identifiers_->Add(identifier.name()));
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}
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return value;
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}
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private:
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// The number of cache entries.
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static constexpr int CacheSize = 0
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#define CARBON_CORE_IDENTIFIER(Name) +1
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#include "toolchain/check/core_identifier.def"
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;
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// A pointer for adding identifiers.
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SharedValueStores::IdentifierStore* identifiers_;
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// The cache of added identifiers. These are stored as a `NameId` because the
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// `IdentifierId` isn't directly used.
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SemIR::NameId cache_[CacheSize] = {
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#define CARBON_CORE_IDENTIFIER(Name) SemIR::NameId::None,
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#include "toolchain/check/core_identifier.def"
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};
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};
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_CORE_IDENTIFIER_H_
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