clang-tools-extra/clang-tidy/fuchsia/DefaultArgumentsCallsCheck.cpp

   1 //===--- DefaultArgumentsCallsCheck.cpp - clang-tidy-----------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "DefaultArgumentsCallsCheck.h"
  10
  11 using namespace clang::ast_matchers;
  12
  13 namespace clang::tidy::fuchsia {
  14
  15 void DefaultArgumentsCallsCheck::registerMatchers(MatchFinder *Finder) {
  16   // Calling a function which uses default arguments is disallowed.
  17   Finder->addMatcher(cxxDefaultArgExpr().bind("stmt"), this);
  18 }
  19
  20 void DefaultArgumentsCallsCheck::check(const MatchFinder::MatchResult &Result) {
  21   const auto *S = Result.Nodes.getNodeAs<CXXDefaultArgExpr>("stmt");
  22   if (!S)
  23     return;
  24
  25   diag(S->getUsedLocation(),
  26        "calling a function that uses a default argument is disallowed");
  27   diag(S->getParam()->getBeginLoc(), "default parameter was declared here",
  28        DiagnosticIDs::Note);
  29 }
  30
  31 } // namespace clang::tidy::fuchsia