| 1 | //===--- UseBoolLiteralsCheck.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 "UseBoolLiteralsCheck.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::modernize { |
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| 17 | |
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| 18 | UseBoolLiteralsCheck::UseBoolLiteralsCheck(StringRef Name, |
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| 19 | ClangTidyContext *Context) |
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| 20 | : ClangTidyCheck(Name, Context), |
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| 21 | IgnoreMacros(Options.getLocalOrGlobal(LocalName: "IgnoreMacros" , Default: true)) {} |
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| 22 | |
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| 23 | void UseBoolLiteralsCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) { |
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| 24 | Options.store(Options&: Opts, LocalName: "IgnoreMacros" , Value: IgnoreMacros); |
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| 25 | } |
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| 26 | |
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| 27 | void UseBoolLiteralsCheck::registerMatchers(MatchFinder *Finder) { |
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| 28 | Finder->addMatcher( |
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| 29 | NodeMatch: traverse( |
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| 30 | TK: TK_AsIs, |
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| 31 | InnerMatcher: implicitCastExpr( |
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| 32 | has(ignoringParenImpCasts(InnerMatcher: integerLiteral().bind(ID: "literal" ))), |
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| 33 | hasImplicitDestinationType(InnerMatcher: qualType(booleanType())), |
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| 34 | unless(isInTemplateInstantiation()), |
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| 35 | anyOf(hasParent(explicitCastExpr().bind(ID: "cast" )), anything()))), |
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| 36 | Action: this); |
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| 37 | |
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| 38 | Finder->addMatcher( |
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| 39 | NodeMatch: traverse(TK: TK_AsIs, |
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| 40 | InnerMatcher: conditionalOperator( |
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| 41 | hasParent(implicitCastExpr( |
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| 42 | hasImplicitDestinationType(InnerMatcher: qualType(booleanType())), |
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| 43 | unless(isInTemplateInstantiation()))), |
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| 44 | eachOf(hasTrueExpression(InnerMatcher: ignoringParenImpCasts( |
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| 45 | InnerMatcher: integerLiteral().bind(ID: "literal" ))), |
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| 46 | hasFalseExpression(InnerMatcher: ignoringParenImpCasts( |
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| 47 | InnerMatcher: integerLiteral().bind(ID: "literal" )))))), |
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| 48 | Action: this); |
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| 49 | } |
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| 50 | |
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| 51 | void UseBoolLiteralsCheck::check(const MatchFinder::MatchResult &Result) { |
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| 52 | const auto *Literal = Result.Nodes.getNodeAs<IntegerLiteral>(ID: "literal" ); |
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| 53 | const auto *Cast = Result.Nodes.getNodeAs<Expr>(ID: "cast" ); |
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| 54 | bool LiteralBooleanValue = Literal->getValue().getBoolValue(); |
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| 55 | |
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| 56 | if (Literal->isInstantiationDependent()) |
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| 57 | return; |
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| 58 | |
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| 59 | const Expr *Expression = Cast ? Cast : Literal; |
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| 60 | |
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| 61 | bool InMacro = Expression->getBeginLoc().isMacroID(); |
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| 62 | |
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| 63 | if (InMacro && IgnoreMacros) |
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| 64 | return; |
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| 65 | |
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| 66 | auto Diag = |
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| 67 | diag(Loc: Expression->getExprLoc(), |
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| 68 | Description: "converting integer literal to bool, use bool literal instead" ); |
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| 69 | |
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| 70 | if (!InMacro) |
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| 71 | Diag << FixItHint::CreateReplacement( |
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| 72 | Expression->getSourceRange(), LiteralBooleanValue ? "true" : "false" ); |
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| 73 | } |
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| 74 | |
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| 75 | } // namespace clang::tidy::modernize |
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| 76 | |
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