clang-tools  9.0.0
DefaultArgumentsDeclarationsCheck.cpp
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1 //===--- DefaultArgumentsDeclarationsCheck.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 
11 using namespace clang::ast_matchers;
12 
13 namespace clang {
14 namespace tidy {
15 namespace fuchsia {
16 
17 void DefaultArgumentsDeclarationsCheck::registerMatchers(MatchFinder *Finder) {
18  // Declaring default parameters is disallowed.
19  Finder->addMatcher(parmVarDecl(hasDefaultArgument()).bind("decl"), this);
20 }
21 
22 void DefaultArgumentsDeclarationsCheck::check(
23  const MatchFinder::MatchResult &Result) {
24  const auto *D = Result.Nodes.getNodeAs<ParmVarDecl>("decl");
25  if (!D)
26  return;
27 
28  SourceRange DefaultArgRange = D->getDefaultArgRange();
29 
30  if (DefaultArgRange.getEnd() != D->getEndLoc())
31  return;
32 
33  if (DefaultArgRange.getBegin().isMacroID()) {
34  diag(D->getBeginLoc(),
35  "declaring a parameter with a default argument is disallowed");
36  return;
37  }
38 
39  SourceLocation StartLocation =
40  D->getName().empty() ? D->getBeginLoc() : D->getLocation();
41 
42  SourceRange RemovalRange(
43  Lexer::getLocForEndOfToken(StartLocation, 0, *Result.SourceManager,
44  Result.Context->getLangOpts()),
45  DefaultArgRange.getEnd());
46 
47  diag(D->getBeginLoc(),
48  "declaring a parameter with a default argument is disallowed")
49  << D << FixItHint::CreateRemoval(RemovalRange);
50 }
51 
52 } // namespace fuchsia
53 } // namespace tidy
54 } // namespace clang
const Decl * D
Definition: XRefs.cpp:868
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
llvm::Optional< llvm::Expected< tooling::AtomicChanges > > Result
Definition: Rename.cpp:36