clang-tools  10.0.0
AvoidThrowingObjCExceptionCheck.cpp
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1 //===--- AvoidThrowingObjCExceptionCheck.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 
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 google {
18 namespace objc {
19 
20 void AvoidThrowingObjCExceptionCheck::registerMatchers(MatchFinder *Finder) {
21  // this check should only be applied to ObjC sources.
22  if (!getLangOpts().ObjC)
23  return;
24 
25  Finder->addMatcher(objcThrowStmt().bind("throwStmt"), this);
26  Finder->addMatcher(
27  objcMessageExpr(anyOf(hasSelector("raise:format:"),
28  hasSelector("raise:format:arguments:")),
29  hasReceiverType(asString("NSException")))
30  .bind("raiseException"),
31  this);
32 }
33 
34 void AvoidThrowingObjCExceptionCheck::check(
35  const MatchFinder::MatchResult &Result) {
36  const auto *MatchedStmt =
37  Result.Nodes.getNodeAs<ObjCAtThrowStmt>("throwStmt");
38  const auto *MatchedExpr =
39  Result.Nodes.getNodeAs<ObjCMessageExpr>("raiseException");
40  auto SourceLoc = MatchedStmt == nullptr ? MatchedExpr->getSelectorStartLoc()
41  : MatchedStmt->getThrowLoc();
42  diag(SourceLoc,
43  "pass in NSError ** instead of throwing exception to indicate "
44  "Objective-C errors");
45 }
46 
47 } // namespace objc
48 } // namespace google
49 } // namespace tidy
50 } // namespace clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//