| 1 | //===--- MissingHashCheck.cpp - clang-tidy --------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "MissingHashCheck.h" |
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| 10 | #include "clang/AST/ASTContext.h" |
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| 11 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
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| 12 | |
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| 13 | using namespace clang::ast_matchers; |
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| 14 | |
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| 15 | namespace clang::tidy::objc { |
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| 16 | |
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| 17 | namespace { |
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| 18 | |
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| 19 | AST_MATCHER_P(ObjCImplementationDecl, hasInterface, |
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| 20 | ast_matchers::internal::Matcher<ObjCInterfaceDecl>, Base) { |
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| 21 | const ObjCInterfaceDecl *InterfaceDecl = Node.getClassInterface(); |
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| 22 | return Base.matches(Node: *InterfaceDecl, Finder, Builder); |
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| 23 | } |
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| 24 | |
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| 25 | AST_MATCHER_P(ObjCContainerDecl, hasInstanceMethod, |
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| 26 | ast_matchers::internal::Matcher<ObjCMethodDecl>, Base) { |
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| 27 | // Check each instance method against the provided matcher. |
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| 28 | for (const auto *I : Node.instance_methods()) { |
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| 29 | if (Base.matches(Node: *I, Finder, Builder)) |
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| 30 | return true; |
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| 31 | } |
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| 32 | return false; |
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| 33 | } |
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| 34 | |
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| 35 | } // namespace |
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| 36 | |
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| 37 | void MissingHashCheck::registerMatchers(MatchFinder *Finder) { |
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| 38 | Finder->addMatcher( |
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| 39 | NodeMatch: objcMethodDecl( |
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| 40 | hasName(Name: "isEqual:" ), isInstanceMethod(), |
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| 41 | hasDeclContext(InnerMatcher: objcImplementationDecl( |
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| 42 | hasInterface(Base: isDirectlyDerivedFrom(BaseName: "NSObject" )), |
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| 43 | unless(hasInstanceMethod(Base: hasName(Name: "hash" )))) |
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| 44 | .bind(ID: "impl" ))), |
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| 45 | Action: this); |
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| 46 | } |
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| 47 | |
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| 48 | void MissingHashCheck::check(const MatchFinder::MatchResult &Result) { |
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| 49 | const auto *ID = Result.Nodes.getNodeAs<ObjCImplementationDecl>(ID: "impl" ); |
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| 50 | diag(ID->getLocation(), "%0 implements -isEqual: without implementing -hash" ) |
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| 51 | << ID; |
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| 52 | } |
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| 53 | |
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| 54 | } // namespace clang::tidy::objc |
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| 55 | |
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