//===--- GlobalNamesInHeadersCheck.h - clang-tidy ---------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_GLOBALNAMESINHEADERSCHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_GLOBALNAMESINHEADERSCHECK_H

#include "../ClangTidyCheck.h"
#include "../utils/FileExtensionsUtils.h"

namespace clang::tidy::google::readability {

/// Flag global namespace pollution in header files.
/// Right now it only triggers on using declarations and directives.
///
/// The check supports these options:
///   - `HeaderFileExtensions`: a semicolon-separated list of filename
///     extensions of header files (the filename extensions should not contain
///     "." prefix). ";h;hh;hpp;hxx" by default.
///
///     For extension-less header files, using an empty string or leaving an
///     empty string between ";" if there are other filename extensions.
///
/// For the user-facing documentation see:
/// http://clang.llvm.org/extra/clang-tidy/checks/google/global-names-in-headers.html
class GlobalNamesInHeadersCheck : public ClangTidyCheck {
public:
  GlobalNamesInHeadersCheck(StringRef Name, ClangTidyContext *Context);
  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;

private:
  const StringRef RawStringHeaderFileExtensions;
  utils::FileExtensionsSet HeaderFileExtensions;
};

} // namespace clang::tidy::google::readability

#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_GOOGLE_GLOBALNAMESINHEADERSCHECK_H
