forked from OSchip/llvm-project
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
//===--- UseBoolLiteralsCheck.cpp - clang-tidy-----------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "UseBoolLiteralsCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/Lex/Lexer.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace modernize {
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UseBoolLiteralsCheck::UseBoolLiteralsCheck(StringRef Name,
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ClangTidyContext *Context)
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: ClangTidyCheck(Name, Context),
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IgnoreMacros(Options.getLocalOrGlobal("IgnoreMacros", true)) {}
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void UseBoolLiteralsCheck::registerMatchers(MatchFinder *Finder) {
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if (!getLangOpts().CPlusPlus)
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return;
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Finder->addMatcher(
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implicitCastExpr(
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has(ignoringParenImpCasts(integerLiteral().bind("literal"))),
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hasImplicitDestinationType(qualType(booleanType())),
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unless(isInTemplateInstantiation()),
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anyOf(hasParent(explicitCastExpr().bind("cast")), anything())),
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this);
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Finder->addMatcher(
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conditionalOperator(
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hasParent(implicitCastExpr(
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hasImplicitDestinationType(qualType(booleanType())),
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unless(isInTemplateInstantiation()))),
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eachOf(hasTrueExpression(
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ignoringParenImpCasts(integerLiteral().bind("literal"))),
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hasFalseExpression(
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ignoringParenImpCasts(integerLiteral().bind("literal"))))),
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this);
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}
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void UseBoolLiteralsCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *Literal = Result.Nodes.getNodeAs<IntegerLiteral>("literal");
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const auto *Cast = Result.Nodes.getNodeAs<Expr>("cast");
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bool LiteralBooleanValue = Literal->getValue().getBoolValue();
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if (Literal->isInstantiationDependent())
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return;
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const Expr *Expression = Cast ? Cast : Literal;
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bool InMacro = Expression->getBeginLoc().isMacroID();
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if (InMacro && IgnoreMacros)
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return;
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auto Diag =
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diag(Expression->getExprLoc(),
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"converting integer literal to bool, use bool literal instead");
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if (!InMacro)
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Diag << FixItHint::CreateReplacement(
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Expression->getSourceRange(), LiteralBooleanValue ? "true" : "false");
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}
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} // namespace modernize
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} // namespace tidy
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} // namespace clang
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