swift-compatibility-symbols.cpp

//===--- swift-compatibility-symbols.cpp - Emit Clang symbol list ---------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// A simple program to dynamically generate the list of macros added to
// compatibility headers.
//
//===----------------------------------------------------------------------===//

#include"llvm/ADT/SmallVector.h"
#include"llvm/ADT/StringRef.h"
#include"llvm/Support/CommandLine.h"
#include"llvm/Support/FileSystem.h"
#include"llvm/Support/raw_ostream.h"

#include<algorithm>
#include<cstdlib>
#include<iostream>
#include<system_error>

namespaceoptions {

static llvm::cl::OptionCategory Category("swift-compatibility-symbols Options");

static llvm::cl::opt<std::string>
OutputFilename("output-filename",
llvm::cl::desc("Filename for the output file"),
 llvm::cl::init("-"),
 llvm::cl::cat(Category));

}

intmain(int argc, char *argv[]) {
llvm::cl::HideUnrelatedOptions(options::Category);
llvm::cl::ParseCommandLineOptions(argc, argv,
"Swift Compatibility Symbols listing\n");

 std::error_code error;
 llvm::raw_fd_ostream OS(options::OutputFilename, error, llvm::sys::fs::CD_CreateAlways);
if (OS.has_error() || error) {
llvm::errs() << "Error when trying to write to output file; error code "
 << error.message() << "\n";
return EXIT_FAILURE;
 }

 llvm::SmallVector<llvm::StringRef, 40> symbols;
#defineCLANG_MACRO_DEFINED(NAME) \
 symbols.push_back(NAME);

#defineCLANG_MACRO(NAME, ARGS, VALUE) \
CLANG_MACRO_DEFINED(NAME)

#defineCLANG_MACRO_BODY(NAME, BODY) \
CLANG_MACRO_DEFINED(NAME)

#defineCLANG_MACRO_ALTERNATIVE(NAME, ARGS, CONDITION, VALUE, ALTERNATIVE) \
CLANG_MACRO_DEFINED(NAME)

#defineCLANG_MACRO_CONDITIONAL(NAME, ARGS, CONDITION, VALUE) \
CLANG_MACRO_DEFINED(NAME)

#defineCLANG_MACRO_OBJC(NAME, ARGS, VALUE) \
CLANG_MACRO_DEFINED(NAME)

#defineCLANG_MACRO_CXX(NAME, ARGS, VALUE, ALTERNATIVE) \
CLANG_MACRO_DEFINED(NAME)

#defineCLANG_MACRO_CXX_BODY(NAME, BODY) \
CLANG_MACRO_DEFINED(NAME)

#include"swift/PrintAsClang/ClangMacros.def"

std::sort(symbols.begin(), symbols.end());

for (const llvm::StringRef sym : symbols) {
 OS << sym << "\n";
 }

return EXIT_SUCCESS;
}