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OverloadedUnaryAndCheck.cpp
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1 //===--- OverloadedUnaryAndCheck.cpp - clang-tidy ---------------*- C++ -*-===//
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 "OverloadedUnaryAndCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 #include "clang/ASTMatchers/ASTMatchers.h"
14
15 using namespace clang::ast_matchers;
16
17 namespace clang {
18 namespace tidy {
19 namespace google {
20 namespace runtime {
21
22 void
23 OverloadedUnaryAndCheck::registerMatchers(ast_matchers::MatchFinder *Finder) {
24 // Only register the matchers for C++; the functionality currently does not
25 // provide any benefit to other languages, despite being benign.
26 if (!getLangOpts().CPlusPlus)
27 return;
28
29 // Match unary methods that overload operator&.
30 Finder->addMatcher(
31 cxxMethodDecl(parameterCountIs(0), hasOverloadedOperatorName("&"))
32 .bind("overload"),
33 this);
34 // Also match freestanding unary operator& overloads. Be careful not to match
35 // binary methods.
36 Finder->addMatcher(
37 functionDecl(
38 allOf(unless(cxxMethodDecl()),
39 functionDecl(parameterCountIs(1),
40 hasOverloadedOperatorName("&")).bind("overload"))),
41 this);
42 }
43
44 void OverloadedUnaryAndCheck::check(const MatchFinder::MatchResult &Result) {
45 const auto *Decl = Result.Nodes.getNodeAs<FunctionDecl>("overload");
46 diag(Decl->getLocStart(),
47 "do not overload unary operator&, it is dangerous.");
48 }
49
50 } // namespace runtime
51 } // namespace google
52 } // namespace tidy
53 } // namespace clang
Finder
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:188
OverloadedUnaryAndCheck.h
Result
const NamedDecl * Result
Definition: USRFinder.cpp:121