clang-tools-extra/clang-tidy/objc/AvoidNSErrorInitCheck.cpp

   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::tidy::objc {
  16
  17 void AvoidNSErrorInitCheck::registerMatchers(MatchFinder *Finder) {
  18   Finder->addMatcher(objcMessageExpr(hasSelector("init"),
  19                                      hasReceiverType(asString("NSError *")))
  20                          .bind("nserrorInit"),
  21                      this);
  22 }
  23
  24 void AvoidNSErrorInitCheck::check(const MatchFinder::MatchResult &Result) {
  25   const auto *MatchedExpr =
  26       Result.Nodes.getNodeAs<ObjCMessageExpr>("nserrorInit");
  27   diag(MatchedExpr->getBeginLoc(),
  28        "use errorWithDomain:code:userInfo: or initWithDomain:code:userInfo: to "
  29        "create a new NSError");
  30 }
  31
  32 } // namespace clang::tidy::objc