forked from OSchip/llvm-project
81 lines
2.9 KiB
C++
81 lines
2.9 KiB
C++
//===--- GlobalNamesInHeadersCheck.cpp - clang-tidy -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "GlobalNamesInHeadersCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "clang/Lex/Lexer.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace google {
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namespace readability {
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GlobalNamesInHeadersCheck::GlobalNamesInHeadersCheck(StringRef Name,
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ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context),
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RawStringHeaderFileExtensions(Options.getLocalOrGlobal(
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"HeaderFileExtensions", utils::defaultHeaderFileExtensions())) {
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if (!utils::parseFileExtensions(RawStringHeaderFileExtensions,
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HeaderFileExtensions,
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utils::defaultFileExtensionDelimiters())) {
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llvm::errs() << "Invalid header file extension: "
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<< RawStringHeaderFileExtensions << "\n";
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}
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}
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void GlobalNamesInHeadersCheck::storeOptions(
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ClangTidyOptions::OptionMap &Opts) {
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Options.store(Opts, "HeaderFileExtensions", RawStringHeaderFileExtensions);
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}
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void GlobalNamesInHeadersCheck::registerMatchers(
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ast_matchers::MatchFinder *Finder) {
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Finder->addMatcher(decl(anyOf(usingDecl(), usingDirectiveDecl()),
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hasDeclContext(translationUnitDecl()))
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.bind("using_decl"),
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this);
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}
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void GlobalNamesInHeadersCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *D = Result.Nodes.getNodeAs<Decl>("using_decl");
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// If it comes from a macro, we'll assume it is fine.
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if (D->getBeginLoc().isMacroID())
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return;
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// Ignore if it comes from the "main" file ...
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if (Result.SourceManager->isInMainFile(
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Result.SourceManager->getExpansionLoc(D->getBeginLoc()))) {
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// unless that file is a header.
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if (!utils::isSpellingLocInHeaderFile(
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D->getBeginLoc(), *Result.SourceManager, HeaderFileExtensions))
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return;
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}
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if (const auto *UsingDirective = dyn_cast<UsingDirectiveDecl>(D)) {
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if (UsingDirective->getNominatedNamespace()->isAnonymousNamespace()) {
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// Anonymous namespaces inject a using directive into the AST to import
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// the names into the containing namespace.
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// We should not have them in headers, but there is another warning for
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// that.
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return;
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}
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}
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diag(D->getBeginLoc(),
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"using declarations in the global namespace in headers are prohibited");
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}
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} // namespace readability
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} // namespace google
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} // namespace tidy
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} // namespace clang
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