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VariadicFunctionDefCheck.cpp
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1 //===--- VariadicfunctiondefCheck.cpp - clang-tidy-------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "VariadicFunctionDefCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13
14 using namespace clang::ast_matchers;
15
16 namespace clang {
17 namespace tidy {
18 namespace cert {
19
20 void VariadicFunctionDefCheck::registerMatchers(MatchFinder *Finder) {
21 if (!getLangOpts().CPlusPlus)
22 return;
23
24 // We only care about function *definitions* that are variadic, and do not
25 // have extern "C" language linkage.
26 Finder->addMatcher(
27 functionDecl(isDefinition(), isVariadic(), unless(isExternC()))
28 .bind("func"),
29 this);
30 }
31
32 void VariadicFunctionDefCheck::check(const MatchFinder::MatchResult &Result) {
33 const auto *FD = Result.Nodes.getNodeAs<FunctionDecl>("func");
34
35 diag(FD->getLocation(),
36 "do not define a C-style variadic function; consider using a function "
37 "parameter pack or currying instead");
38 }
39
40 } // namespace cert
41 } // namespace tidy
42 } // namespace clang
Finder
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:188
VariadicFunctionDefCheck.h
Result
const NamedDecl * Result
Definition: USRFinder.cpp:121