clang-tools 20.0.0git
UnnamedNamespaceInHeaderCheck.cpp
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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
10#include "clang/AST/ASTContext.h"
11#include "clang/ASTMatchers/ASTMatchFinder.h"
12#include "clang/ASTMatchers/ASTMatchers.h"
13
14using namespace clang::ast_matchers;
15
17
19 StringRef Name, ClangTidyContext *Context)
20 : ClangTidyCheck(Name, Context),
21 HeaderFileExtensions(Context->getHeaderFileExtensions()) {}
22
24 ast_matchers::MatchFinder *Finder) {
25 Finder->addMatcher(namespaceDecl(isAnonymous()).bind("anonymousNamespace"),
26 this);
27}
28
30 const MatchFinder::MatchResult &Result) {
31 const auto *N = Result.Nodes.getNodeAs<NamespaceDecl>("anonymousNamespace");
32 SourceLocation Loc = N->getBeginLoc();
33 if (!Loc.isValid())
34 return;
35
36 if (utils::isPresumedLocInHeaderFile(Loc, *Result.SourceManager,
37 HeaderFileExtensions))
38 diag(Loc, "do not use unnamed namespaces in header files");
39}
40
41} // namespace clang::tidy::google::build
llvm::SmallString< 256U > Name
SourceLocation Loc
Base class for all clang-tidy checks.
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
UnnamedNamespaceInHeaderCheck(StringRef Name, ClangTidyContext *Context)
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
bool isPresumedLocInHeaderFile(SourceLocation Loc, SourceManager &SM, const FileExtensionsSet &HeaderFileExtensions)
Checks whether presumed location of Loc is in header file.