clang-tools 20.0.0git
VariadicFunctionDefCheck.cpp
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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
10#include "clang/AST/ASTContext.h"
11#include "clang/ASTMatchers/ASTMatchFinder.h"
12
13using namespace clang::ast_matchers;
14
15namespace clang::tidy::cert {
16
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
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
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.