1 //===--- AvoidNSErrorInitCheck.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 "AvoidNSErrorInitCheck.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 
registerMatchers(MatchFinder * Finder)19 void AvoidNSErrorInitCheck::registerMatchers(MatchFinder *Finder) {
20   Finder->addMatcher(objcMessageExpr(hasSelector("init"),
21                                      hasReceiverType(asString("NSError *")))
22                          .bind("nserrorInit"),
23                      this);
24 }
25 
check(const MatchFinder::MatchResult & Result)26 void AvoidNSErrorInitCheck::check(const MatchFinder::MatchResult &Result) {
27   const auto *MatchedExpr =
28       Result.Nodes.getNodeAs<ObjCMessageExpr>("nserrorInit");
29   diag(MatchedExpr->getBeginLoc(),
30        "use errorWithDomain:code:userInfo: or initWithDomain:code:userInfo: to "
31        "create a new NSError");
32 }
33 
34 }  // namespace objc
35 }  // namespace tidy
36 }  // namespace clang
37