llvm/clang-tools-extra/clang-change-namespace/tool/ClangChangeNamespace.cpp

//===-- ClangChangeNamespace.cpp - Standalone change namespace ------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// This tool can be used to change the surrounding namespaces of class/function
// definitions.
//
// Example: test.cc
//    namespace na {
//    class X {};
//    namespace nb {
//    class Y { X x; };
//    } // namespace nb
//    } // namespace na
// To move the definition of class Y from namespace "na::nb" to "x::y", run:
//    clang-change-namespace --old_namespace "na::nb" \
//      --new_namespace "x::y" --file_pattern "test.cc" test.cc --
// Output:
//    namespace na {
//    class X {};
//    } // namespace na
//    namespace x {
//    namespace y {
//    class Y { na::X x; };
//    } // namespace y
//    } // namespace x

#include "ChangeNamespace.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Refactoring.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/YAMLTraits.h"

usingnamespaceclang;
usingnamespacellvm;

namespace {

cl::OptionCategory ChangeNamespaceCategory("Change namespace.");

cl::opt<std::string> OldNamespace("old_namespace", cl::Required,
                                  cl::desc("Old namespace."),
                                  cl::cat(ChangeNamespaceCategory));

cl::opt<std::string> NewNamespace("new_namespace", cl::Required,
                                  cl::desc("New namespace."),
                                  cl::cat(ChangeNamespaceCategory));

cl::opt<std::string> FilePattern(
    "file_pattern", cl::Required,
    cl::desc("Only rename namespaces in files that match the given pattern."),
    cl::cat(ChangeNamespaceCategory));

cl::opt<bool> Inplace("i", cl::desc("Inplace edit <file>s, if specified."),
                      cl::cat(ChangeNamespaceCategory));

cl::opt<bool>
    DumpYAML("dump_result",
         cl::desc("Dump new file contents in YAML, if specified."),
         cl::cat(ChangeNamespaceCategory));

cl::opt<std::string> Style("style",
                           cl::desc("The style name used for reformatting."),
                           cl::init("LLVM"), cl::cat(ChangeNamespaceCategory));

cl::opt<std::string> AllowedFile(
    "allowed_file",
    cl::desc("A file containing regexes of symbol names that are not expected "
             "to be updated when changing namespaces around them."),
    cl::init(""), cl::cat(ChangeNamespaceCategory));

llvm::ErrorOr<std::vector<std::string>> GetAllowedSymbolPatterns() { … }

} // anonymous namespace

int main(int argc, const char **argv) { … }