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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang-tidy/ClangTidyCheck.h"
#include "llvm/ADT/StringRef.h"
#include <fstream>
#include <set>
#include <string>
namespace libcpp {
class header_exportable_declarations : public clang::tidy::ClangTidyCheck {
public:
explicit header_exportable_declarations(llvm::StringRef, clang::tidy::ClangTidyContext*);
~header_exportable_declarations();
void registerMatchers(clang::ast_matchers::MatchFinder*) override;
void check(const clang::ast_matchers::MatchFinder::MatchResult&) override;
enum class FileType {
// std module specific
Header,
CompatModulePartition,
Module,
// std.compat module specific
CHeader,
ModulePartition,
CompatModule,
// invalid value
Unknown
};
private:
llvm::StringRef filename_;
FileType file_type_;
llvm::StringRef extra_header_;
std::set<std::string> decls_;
std::set<std::string> global_decls_;
// The named declarations in .h C headers are "tricky". On POSIX
// systems these headers contain POSIX specific functions that do not
// use a reserved name. For example, fmemopen is provided by stdio.h.
// We filter the names that should be provided by the headers as follows:
// - record all named declarations the global namespace
// - wait until the header is completely processed
// - every named declaration in the global namespace that has a matching
// "export" in the std namespace is exported.
//
// The only place where we can do the above while ensuring that all
// the declarations in the header have been seen is in the clang tidy
// plugin's destructor.
//
// It is possible to skip some declarations in the std namespace,
// these are added to decls_ before processing. To differentiate
// between a skipped declaration and a real declaration the skipped
// declarations are recorded in an extra variable.
std::set<std::string> skip_decls_;
};
} // namespace libcpp
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