1 //===--- AvoidNSErrorInitCheck.cpp - clang-tidy----------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "AvoidNSErrorInitCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 
14 using namespace clang::ast_matchers;
15 
16 namespace clang {
17 namespace tidy {
18 namespace objc {
19 
20 void AvoidNSErrorInitCheck::registerMatchers(MatchFinder *Finder) {
21   Finder->addMatcher(objcMessageExpr(hasSelector("init"),
22                                      hasReceiverType(asString("NSError *")))
23                          .bind("nserrorInit"),
24                      this);
25 }
26 
27 void AvoidNSErrorInitCheck::check(const MatchFinder::MatchResult &Result) {
28   const auto *MatchedExpr =
29       Result.Nodes.getNodeAs<ObjCMessageExpr>("nserrorInit");
30   diag(MatchedExpr->getLocStart(),
31        "use errorWithDomain:code:userInfo: or initWithDomain:code:userInfo: to "
32        "create a new NSError");
33 }
34 
35 }  // namespace objc
36 }  // namespace tidy
37 }  // namespace clang
38