clang-tools  11.0.0
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  Finder->addMatcher(
41  objcMethodDecl(
42  hasName("isEqual:"), isInstanceMethod(),
43  hasDeclContext(objcImplementationDecl(
44  hasInterface(isDirectlyDerivedFrom("NSObject")),
45  unless(hasInstanceMethod(hasName("hash"))))
46  .bind("impl"))),
47  this);
48 }
49 
50 void MissingHashCheck::check(const MatchFinder::MatchResult &Result) {
51  const auto *ID = Result.Nodes.getNodeAs<ObjCImplementationDecl>("impl");
52  diag(ID->getLocation(), "%0 implements -isEqual: without implementing -hash")
53  << ID;
54 }
55 
56 } // namespace objc
57 } // namespace tidy
58 } // namespace clang
Base
std::unique_ptr< GlobalCompilationDatabase > Base
Definition: GlobalCompilationDatabaseTests.cpp:85
clang::ast_matchers
Definition: AbseilMatcher.h:14
clang::tidy::readability::AST_MATCHER_P
AST_MATCHER_P(CXXMethodDecl, hasCanonicalDecl, ast_matchers::internal::Matcher< CXXMethodDecl >, InnerMatcher)
Definition: ConvertMemberFunctionsToStatic.cpp:53
Builder
CodeCompletionBuilder Builder
Definition: CodeCompletionStringsTests.cpp:35
MissingHashCheck.h
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ApplyReplacements.h:27