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::tidy::cert { 16 registerMatchers(MatchFinder * Finder)17void VariadicFunctionDefCheck::registerMatchers(MatchFinder *Finder) { 18 // We only care about function *definitions* that are variadic, and do not 19 // have extern "C" language linkage. 20 Finder->addMatcher( 21 functionDecl(isDefinition(), isVariadic(), unless(isExternC())) 22 .bind("func"), 23 this); 24 } 25 check(const MatchFinder::MatchResult & Result)26void VariadicFunctionDefCheck::check(const MatchFinder::MatchResult &Result) { 27 const auto *FD = Result.Nodes.getNodeAs<FunctionDecl>("func"); 28 29 diag(FD->getLocation(), 30 "do not define a C-style variadic function; consider using a function " 31 "parameter pack or currying instead"); 32 } 33 34 } // namespace clang::tidy::cert 35