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//===--- UnnamedNamespaceInHeaderCheck.cpp - 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
//
//===----------------------------------------------------------------------===//
#include "UnnamedNamespaceInHeaderCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace google {
namespace build {
UnnamedNamespaceInHeaderCheck::UnnamedNamespaceInHeaderCheck(
StringRef Name, ClangTidyContext *Context)
: ClangTidyCheck(Name, Context),
RawStringHeaderFileExtensions(Options.getLocalOrGlobal(
"HeaderFileExtensions", utils::defaultHeaderFileExtensions())) {
if (!utils::parseHeaderFileExtensions(RawStringHeaderFileExtensions,
HeaderFileExtensions, ',')) {
llvm::errs() << "Invalid header file extension: "
<< RawStringHeaderFileExtensions << "\n";
}
}
void UnnamedNamespaceInHeaderCheck::storeOptions(
ClangTidyOptions::OptionMap &Opts) {
Options.store(Opts, "HeaderFileExtensions", RawStringHeaderFileExtensions);
}
void UnnamedNamespaceInHeaderCheck::registerMatchers(
ast_matchers::MatchFinder *Finder) {
// Only register the matchers for C++; the functionality currently does not
// provide any benefit to other languages, despite being benign.
if (getLangOpts().CPlusPlus)
Finder->addMatcher(namespaceDecl(isAnonymous()).bind("anonymousNamespace"),
this);
}
void UnnamedNamespaceInHeaderCheck::check(
const MatchFinder::MatchResult &Result) {
const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("anonymousNamespace");
SourceLocation Loc = N->getBeginLoc();
if (!Loc.isValid())
return;
if (utils::isPresumedLocInHeaderFile(Loc, *Result.SourceManager,
HeaderFileExtensions))
diag(Loc, "do not use unnamed namespaces in header files");
}
} // namespace build
} // namespace google
} // namespace tidy
} // namespace clang
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