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//===--- OverloadedUnaryAndCheck.cpp - clang-tidy ---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "OverloadedUnaryAndCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace google {
namespace runtime {
void
OverloadedUnaryAndCheck::registerMatchers(ast_matchers::MatchFinder *Finder) {
// Only register the matchers for C++; the functionality currently does not
// provide any benefit to other languages, despite being benign.
if (!getLangOpts().CPlusPlus)
return;
// Match unary methods that overload operator&.
Finder->addMatcher(
cxxMethodDecl(parameterCountIs(0), hasOverloadedOperatorName("&"))
.bind("overload"),
this);
// Also match freestanding unary operator& overloads. Be careful not to match
// binary methods.
Finder->addMatcher(
functionDecl(
allOf(unless(cxxMethodDecl()),
functionDecl(parameterCountIs(1),
hasOverloadedOperatorName("&")).bind("overload"))),
this);
}
void OverloadedUnaryAndCheck::check(const MatchFinder::MatchResult &Result) {
const auto *Decl = Result.Nodes.getNodeAs<FunctionDecl>("overload");
diag(Decl->getLocStart(),
"do not overload unary operator&, it is dangerous.");
}
} // namespace runtime
} // namespace google
} // namespace tidy
} // namespace clang
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