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 {
14 namespace tidy {
15 namespace fuchsia {
16 
registerMatchers(MatchFinder * Finder)17 void DefaultArgumentsCallsCheck::registerMatchers(MatchFinder *Finder) {
18   // Calling a function which uses default arguments is disallowed.
19   Finder->addMatcher(cxxDefaultArgExpr().bind("stmt"), this);
20 }
21 
check(const MatchFinder::MatchResult & Result)22 void DefaultArgumentsCallsCheck::check(const MatchFinder::MatchResult &Result) {
23   const auto *S = Result.Nodes.getNodeAs<CXXDefaultArgExpr>("stmt");
24   if (!S)
25     return;
26 
27   diag(S->getUsedLocation(),
28        "calling a function that uses a default argument is disallowed");
29   diag(S->getParam()->getBeginLoc(), "default parameter was declared here",
30        DiagnosticIDs::Note);
31 }
32 
33 } // namespace fuchsia
34 } // namespace tidy
35 } // namespace clang
36