| 1 | //===--- StaticDefinitionInAnonymousNamespaceCheck.cpp - clang-tidy--------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "StaticDefinitionInAnonymousNamespaceCheck.h" |
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| 10 | #include "clang/AST/ASTContext.h" |
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| 11 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
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| 12 | #include "clang/Lex/Lexer.h" |
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| 13 | |
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| 14 | using namespace clang::ast_matchers; |
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| 15 | |
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| 16 | namespace clang::tidy::readability { |
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| 17 | |
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| 18 | void StaticDefinitionInAnonymousNamespaceCheck::registerMatchers( |
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| 19 | MatchFinder *Finder) { |
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| 20 | Finder->addMatcher( |
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| 21 | NodeMatch: namedDecl(anyOf(functionDecl(isDefinition(), isStaticStorageClass()), |
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| 22 | varDecl(isDefinition(), isStaticStorageClass())), |
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| 23 | isInAnonymousNamespace()) |
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| 24 | .bind(ID: "static-def" ), |
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| 25 | Action: this); |
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| 26 | } |
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| 27 | |
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| 28 | void StaticDefinitionInAnonymousNamespaceCheck::check( |
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| 29 | const MatchFinder::MatchResult &Result) { |
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| 30 | const auto *Def = Result.Nodes.getNodeAs<NamedDecl>(ID: "static-def" ); |
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| 31 | // Skips all static definitions defined in Macro. |
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| 32 | if (Def->getLocation().isMacroID()) |
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| 33 | return; |
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| 34 | |
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| 35 | // Skips all static definitions in function scope. |
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| 36 | const DeclContext *DC = Def->getDeclContext(); |
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| 37 | if (DC->getDeclKind() != Decl::Namespace) |
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| 38 | return; |
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| 39 | |
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| 40 | auto Diag = |
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| 41 | diag(Def->getLocation(), "%0 is a static definition in " |
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| 42 | "anonymous namespace; static is redundant here" ) |
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| 43 | << Def; |
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| 44 | Token Tok; |
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| 45 | SourceLocation Loc = Def->getSourceRange().getBegin(); |
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| 46 | while (Loc < Def->getSourceRange().getEnd() && |
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| 47 | !Lexer::getRawToken(Loc, Result&: Tok, SM: *Result.SourceManager, LangOpts: getLangOpts(), |
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| 48 | IgnoreWhiteSpace: true)) { |
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| 49 | SourceRange TokenRange(Tok.getLocation(), Tok.getEndLoc()); |
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| 50 | StringRef SourceText = |
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| 51 | Lexer::getSourceText(Range: CharSourceRange::getTokenRange(R: TokenRange), |
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| 52 | SM: *Result.SourceManager, LangOpts: getLangOpts()); |
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| 53 | if (SourceText == "static" ) { |
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| 54 | Diag << FixItHint::CreateRemoval(RemoveRange: TokenRange); |
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| 55 | break; |
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| 56 | } |
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| 57 | Loc = Tok.getEndLoc(); |
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| 58 | } |
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| 59 | } |
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| 60 | |
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| 61 | } // namespace clang::tidy::readability |
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| 62 | |
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