clang-tools 19.0.0git
StaticDefinitionInAnonymousNamespaceCheck.cpp
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1//===--- StaticDefinitionInAnonymousNamespaceCheck.cpp - clang-tidy--------===//
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/Lex/Lexer.h"
13
14using namespace clang::ast_matchers;
15
17
19 MatchFinder *Finder) {
20 Finder->addMatcher(
21 namedDecl(anyOf(functionDecl(isDefinition(), isStaticStorageClass()),
22 varDecl(isDefinition(), isStaticStorageClass())),
23 isInAnonymousNamespace())
24 .bind("static-def"),
25 this);
26}
27
29 const MatchFinder::MatchResult &Result) {
30 const auto *Def = Result.Nodes.getNodeAs<NamedDecl>("static-def");
31 // Skips all static definitions defined in Macro.
32 if (Def->getLocation().isMacroID())
33 return;
34
35 // Skips all static definitions in function scope.
36 const DeclContext *DC = Def->getDeclContext();
37 if (DC->getDeclKind() != Decl::Namespace)
38 return;
39
40 auto Diag =
41 diag(Def->getLocation(), "%0 is a static definition in "
42 "anonymous namespace; static is redundant here")
43 << Def;
44 Token Tok;
45 SourceLocation Loc = Def->getSourceRange().getBegin();
46 while (Loc < Def->getSourceRange().getEnd() &&
47 !Lexer::getRawToken(Loc, Tok, *Result.SourceManager, getLangOpts(),
48 true)) {
49 SourceRange TokenRange(Tok.getLocation(), Tok.getEndLoc());
50 StringRef SourceText =
51 Lexer::getSourceText(CharSourceRange::getTokenRange(TokenRange),
52 *Result.SourceManager, getLangOpts());
53 if (SourceText == "static") {
54 Diag << FixItHint::CreateRemoval(TokenRange);
55 break;
56 }
57 Loc = Tok.getEndLoc();
58 }
59}
60
61} // namespace clang::tidy::readability
SourceLocation Loc
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
const LangOptions & getLangOpts() const
Returns the language options from the 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.