build/clang-plugin/ExplicitImplicitChecker.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "ExplicitImplicitChecker.h"
   6 #include "CustomMatchers.h"
   7
   8 void ExplicitImplicitChecker::registerMatchers(MatchFinder *AstMatcher) {
   9   AstMatcher->addMatcher(
  10       cxxConstructorDecl(
  11           isInterestingImplicitCtor(),
  12           ofClass(allOf(isConcreteClass(), decl().bind("class"))),
  13           unless(isMarkedImplicit()))
  14           .bind("ctor"),
  15       this);
  16 }
  17
  18 void ExplicitImplicitChecker::check(const MatchFinder::MatchResult &Result) {
  19   // We've already checked everything in the matcher, so we just have to report
  20   // the error.
  21
  22   const CXXConstructorDecl *Ctor =
  23       Result.Nodes.getNodeAs<CXXConstructorDecl>("ctor");
  24   const CXXRecordDecl *Declaration =
  25       Result.Nodes.getNodeAs<CXXRecordDecl>("class");
  26
  27   FixItHint FixItHint =
  28       FixItHint::CreateInsertion(Ctor->getLocation(), "explicit ");
  29   diag(Ctor->getLocation(), "bad implicit conversion constructor for %0",
  30        DiagnosticIDs::Error)
  31       << Declaration->getDeclName();
  32   diag(Ctor->getLocation(),
  33        "consider adding the explicit keyword to the constructor",
  34        DiagnosticIDs::Note)
  35       << FixItHint;
  36 }