ExplicitOperatorBoolChecker.cpp

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "ExplicitOperatorBoolChecker.h"

#include "CustomMatchers.h"

void ExplicitOperatorBoolChecker::registerMatchers(MatchFinder *AstMatcher) {

  AstMatcher->addMatcher(

      cxxMethodDecl(allOf(isFirstParty(), hasName("operator bool")))

          .bind("node"),

      this);

void ExplicitOperatorBoolChecker::check(

    const MatchFinder::MatchResult &Result) {

  const CXXConversionDecl *Method =

      Result.Nodes.getNodeAs<CXXConversionDecl>("node");

  const CXXRecordDecl *Clazz = Method->getParent();

  if (!Method->isExplicit() && !hasCustomAttribute<moz_implicit>(Method) &&

      !ASTIsInSystemHeader(Method->getASTContext(), *Method) &&

      isInterestingDeclForImplicitConversion(Method)) {

    diag(Method->getBeginLoc(), "bad implicit conversion operator for %0",

         DiagnosticIDs::Error)

        << Clazz;

    diag(Method->getBeginLoc(), "consider adding the explicit keyword to %0",

         DiagnosticIDs::Note)

        << "'operator bool'";