clang-tools  10.0.0
MissingHashCheck.cpp
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1 //===--- MissingHashCheck.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 "MissingHashCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace objc {
18 
19 namespace {
20 
21 AST_MATCHER_P(ObjCImplementationDecl, hasInterface,
22  ast_matchers::internal::Matcher<ObjCInterfaceDecl>, Base) {
23  const ObjCInterfaceDecl *InterfaceDecl = Node.getClassInterface();
24  return Base.matches(*InterfaceDecl, Finder, Builder);
25 }
26 
27 AST_MATCHER_P(ObjCContainerDecl, hasInstanceMethod,
28  ast_matchers::internal::Matcher<ObjCMethodDecl>, Base) {
29  // Check each instance method against the provided matcher.
30  for (const auto *I : Node.instance_methods()) {
31  if (Base.matches(*I, Finder, Builder))
32  return true;
33  }
34  return false;
35 }
36 
37 } // namespace
38 
39 void MissingHashCheck::registerMatchers(MatchFinder *Finder) {
40  // This check should only be applied to Objective-C sources.
41  if (!getLangOpts().ObjC)
42  return;
43 
44  Finder->addMatcher(
45  objcMethodDecl(
46  hasName("isEqual:"), isInstanceMethod(),
47  hasDeclContext(objcImplementationDecl(
48  hasInterface(isDirectlyDerivedFrom("NSObject")),
49  unless(hasInstanceMethod(hasName("hash"))))
50  .bind("impl"))),
51  this);
52 }
53 
54 void MissingHashCheck::check(const MatchFinder::MatchResult &Result) {
55  const auto *ID = Result.Nodes.getNodeAs<ObjCImplementationDecl>("impl");
56  diag(ID->getLocation(), "%0 implements -isEqual: without implementing -hash")
57  << ID;
58 }
59 
60 } // namespace objc
61 } // namespace tidy
62 } // namespace clang
CodeCompletionBuilder Builder
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
std::unique_ptr< GlobalCompilationDatabase > Base
AST_MATCHER_P(CXXMethodDecl, hasCanonicalDecl, ast_matchers::internal::Matcher< CXXMethodDecl >, InnerMatcher)