1 //===--- DefaultArgumentsCheck.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 "DefaultArgumentsCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace google {
18 
registerMatchers(MatchFinder * Finder)19 void DefaultArgumentsCheck::registerMatchers(MatchFinder *Finder) {
20   Finder->addMatcher(
21       cxxMethodDecl(anyOf(isOverride(), isVirtual()),
22                     hasAnyParameter(parmVarDecl(hasInitializer(expr()))))
23           .bind("Decl"),
24       this);
25 }
26 
check(const MatchFinder::MatchResult & Result)27 void DefaultArgumentsCheck::check(const MatchFinder::MatchResult &Result) {
28   const auto *MatchedDecl = Result.Nodes.getNodeAs<CXXMethodDecl>("Decl");
29   diag(MatchedDecl->getLocation(),
30        "default arguments on virtual or override methods are prohibited");
31 }
32 
33 } // namespace google
34 } // namespace tidy
35 } // namespace clang
36