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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
f31e1685fd
Instead of exporting a class or namespace each time a new C++ name lookup discovers it, track that we have exported the entity on its name scope, and if a new name lookup finds the same entity, produce the same clang declaration.
41 lines
1.7 KiB
C++
41 lines
1.7 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_CPP_EXPORT_H_
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#define CARBON_TOOLCHAIN_CHECK_CPP_EXPORT_H_
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#include "clang/AST/Decl.h"
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#include "toolchain/check/context.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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// Exports a Carbon name scope into C++ as a namespace or class, or returns the
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// C++ namespace or class declaration that it was imported from.
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//
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// If the name scope has already been exported, returns the existing context.
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// Otherwise, creates a new C++ declaration context and returns it. Returns
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// nullptr if the name scope could not be exported and an error was diagnosed.
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auto ExportNameScopeToCpp(Context& context, SemIR::LocId loc_id,
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SemIR::NameScopeId name_scope_id)
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-> clang::DeclContext*;
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// Exports a Carbon class into C++ as a class, or returns the C++ tag type that
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// the class was imported from.
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//
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// If the class has already been exported, returns the existing C++ class.
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// Otherwise, creates a new C++ class and returns it. Returns nullptr if the
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// class could not be exported and an error was diagnosed.
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auto ExportClassToCpp(Context& context, SemIR::LocId loc_id,
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SemIR::InstId class_inst_id, SemIR::ClassType class_type)
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-> clang::TagDecl*;
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// Get a `clang::FunctionDecl` that can be used to call a Carbon function.
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auto ExportFunctionToCpp(Context& context, SemIR::LocId loc_id,
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SemIR::FunctionId function_id) -> clang::FunctionDecl*;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_CPP_EXPORT_H_
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