1 //===-- VariadicFunctionDefCheck.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 "VariadicFunctionDefCheck.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 cert { 18 19 void VariadicFunctionDefCheck::registerMatchers(MatchFinder *Finder) { 20 if (!getLangOpts().CPlusPlus) 21 return; 22 23 // We only care about function *definitions* that are variadic, and do not 24 // have extern "C" language linkage. 25 Finder->addMatcher( 26 functionDecl(isDefinition(), isVariadic(), unless(isExternC())) 27 .bind("func"), 28 this); 29 } 30 31 void VariadicFunctionDefCheck::check(const MatchFinder::MatchResult &Result) { 32 const auto *FD = Result.Nodes.getNodeAs<FunctionDecl>("func"); 33 34 diag(FD->getLocation(), 35 "do not define a C-style variadic function; consider using a function " 36 "parameter pack or currying instead"); 37 } 38 39 } // namespace cert 40 } // namespace tidy 41 } // namespace clang 42