1 //===--- UnnamedNamespaceInHeaderCheck.cpp - clang-tidy ---------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "UnnamedNamespaceInHeaderCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 #include "clang/ASTMatchers/ASTMatchers.h"
13
14 using namespace clang::ast_matchers;
15
16 namespace clang {
17 namespace tidy {
18 namespace google {
19 namespace build {
20
UnnamedNamespaceInHeaderCheck(StringRef Name,ClangTidyContext * Context)21 UnnamedNamespaceInHeaderCheck::UnnamedNamespaceInHeaderCheck(
22 StringRef Name, ClangTidyContext *Context)
23 : ClangTidyCheck(Name, Context),
24 RawStringHeaderFileExtensions(Options.getLocalOrGlobal(
25 "HeaderFileExtensions", utils::defaultHeaderFileExtensions())) {
26 if (!utils::parseFileExtensions(RawStringHeaderFileExtensions,
27 HeaderFileExtensions,
28 utils::defaultFileExtensionDelimiters())) {
29 this->configurationDiag("Invalid header file extension: '%0'")
30 << RawStringHeaderFileExtensions;
31 }
32 }
33
storeOptions(ClangTidyOptions::OptionMap & Opts)34 void UnnamedNamespaceInHeaderCheck::storeOptions(
35 ClangTidyOptions::OptionMap &Opts) {
36 Options.store(Opts, "HeaderFileExtensions", RawStringHeaderFileExtensions);
37 }
38
registerMatchers(ast_matchers::MatchFinder * Finder)39 void UnnamedNamespaceInHeaderCheck::registerMatchers(
40 ast_matchers::MatchFinder *Finder) {
41 Finder->addMatcher(namespaceDecl(isAnonymous()).bind("anonymousNamespace"),
42 this);
43 }
44
check(const MatchFinder::MatchResult & Result)45 void UnnamedNamespaceInHeaderCheck::check(
46 const MatchFinder::MatchResult &Result) {
47 const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("anonymousNamespace");
48 SourceLocation Loc = N->getBeginLoc();
49 if (!Loc.isValid())
50 return;
51
52 if (utils::isPresumedLocInHeaderFile(Loc, *Result.SourceManager,
53 HeaderFileExtensions))
54 diag(Loc, "do not use unnamed namespaces in header files");
55 }
56
57 } // namespace build
58 } // namespace google
59 } // namespace tidy
60 } // namespace clang
61