mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
7d89ac98c7
Instead of building one Clang `ASTContext` per compilation, the `--share-cpp-ast` flag causes us to build a single `ASTContext` and share it across all contexts. One new abstraction is added: `CppDomain` represents the Carbon-side view of a Clang AST that might be shared across multiple `SemIR::File`s. This object owns the Clang instance and the AST. For now, we have no isolation between the C++ state exposed to different Carbon compilations, and we have no multiplexing of generated LLVM IR from C++ into different Carbon compilations, so the mode is not usable yet. The plan is to keep it behind a flag until it's ready. Assisted-by: Gemini via Antigravity
31 lines
1006 B
C++
31 lines
1006 B
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/cpp/context.h"
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#include "clang/AST/Mangle.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Parse/Parser.h"
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namespace Carbon::Check {
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CppContext::CppContext(clang::CompilerInstance& instance,
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std::shared_ptr<clang::Parser> parser,
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std::unique_ptr<CppDiagnosticListener> listener)
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: ast_context_(&instance.getASTContext()),
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sema_(&instance.getSema()),
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parser_(std::move(parser)),
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diagnostic_listener_(std::move(listener)) {}
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CppContext::~CppContext() = default;
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auto CppContext::clang_mangle_context() -> clang::MangleContext& {
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if (!clang_mangle_context_) {
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clang_mangle_context_.reset(ast_context().createMangleContext());
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}
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return *clang_mangle_context_;
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}
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} // namespace Carbon::Check
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