clang-tools 20.0.0git
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
13using namespace clang::ast_matchers;
14
15namespace clang::tidy::objc {
16
17namespace {
18
19AST_MATCHER_P(ObjCImplementationDecl, hasInterface,
20 ast_matchers::internal::Matcher<ObjCInterfaceDecl>, Base) {
21 const ObjCInterfaceDecl *InterfaceDecl = Node.getClassInterface();
22 return Base.matches(*InterfaceDecl, Finder, Builder);
23}
24
25AST_MATCHER_P(ObjCContainerDecl, hasInstanceMethod,
26 ast_matchers::internal::Matcher<ObjCMethodDecl>, Base) {
27 // Check each instance method against the provided matcher.
28 for (const auto *I : Node.instance_methods()) {
29 if (Base.matches(*I, Finder, Builder))
30 return true;
31 }
32 return false;
33}
34
35} // namespace
36
37void MissingHashCheck::registerMatchers(MatchFinder *Finder) {
38 Finder->addMatcher(
39 objcMethodDecl(
40 hasName("isEqual:"), isInstanceMethod(),
41 hasDeclContext(objcImplementationDecl(
42 hasInterface(isDirectlyDerivedFrom("NSObject")),
43 unless(hasInstanceMethod(hasName("hash"))))
44 .bind("impl"))),
45 this);
46}
47
48void MissingHashCheck::check(const MatchFinder::MatchResult &Result) {
49 const auto *ID = Result.Nodes.getNodeAs<ObjCImplementationDecl>("impl");
50 diag(ID->getLocation(), "%0 implements -isEqual: without implementing -hash")
51 << ID;
52}
53
54} // namespace clang::tidy::objc
CodeCompletionBuilder Builder
::clang::DynTypedNode Node
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
AST_MATCHER_P(UserDefinedLiteral, hasLiteral, clang::ast_matchers::internal::Matcher< Expr >, InnerMatcher)