ExplicitImplicitChecker.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 "ExplicitImplicitChecker.h"

#include "CustomMatchers.h"

void ExplicitImplicitChecker::registerMatchers(MatchFinder *AstMatcher) {

  AstMatcher->addMatcher(

      cxxConstructorDecl(

          isInterestingImplicitCtor(),

          ofClass(allOf(isConcreteClass(), decl().bind("class"))),

          unless(isMarkedImplicit()))

          .bind("ctor"),

      this);

void ExplicitImplicitChecker::check(const MatchFinder::MatchResult &Result) {

  // We've already checked everything in the matcher, so we just have to report

  // the error.

  const CXXConstructorDecl *Ctor =

      Result.Nodes.getNodeAs<CXXConstructorDecl>("ctor");

  const CXXRecordDecl *Declaration =

      Result.Nodes.getNodeAs<CXXRecordDecl>("class");

  FixItHint FixItHint =

      FixItHint::CreateInsertion(Ctor->getLocation(), "explicit ");

  diag(Ctor->getLocation(), "bad implicit conversion constructor for %0",

       DiagnosticIDs::Error)

      << Declaration->getDeclName();

  diag(Ctor->getLocation(),

       "consider adding the explicit keyword to the constructor",

       DiagnosticIDs::Note)

      << FixItHint;