clang-tools  11.0.0
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 #include "clang/Lex/Lexer.h"
11 
12 using namespace clang::ast_matchers;
13 
14 namespace clang {
15 namespace tidy {
16 namespace fuchsia {
17 
18 void DefaultArgumentsDeclarationsCheck::registerMatchers(MatchFinder *Finder) {
19  // Declaring default parameters is disallowed.
20  Finder->addMatcher(parmVarDecl(hasDefaultArgument()).bind("decl"), this);
21 }
22 
23 void DefaultArgumentsDeclarationsCheck::check(
24  const MatchFinder::MatchResult &Result) {
25  const auto *D = Result.Nodes.getNodeAs<ParmVarDecl>("decl");
26  if (!D)
27  return;
28 
29  SourceRange DefaultArgRange = D->getDefaultArgRange();
30 
31  if (DefaultArgRange.getEnd() != D->getEndLoc())
32  return;
33 
34  if (DefaultArgRange.getBegin().isMacroID()) {
35  diag(D->getBeginLoc(),
36  "declaring a parameter with a default argument is disallowed");
37  return;
38  }
39 
40  SourceLocation StartLocation =
41  D->getName().empty() ? D->getBeginLoc() : D->getLocation();
42 
43  SourceRange RemovalRange(
44  Lexer::getLocForEndOfToken(StartLocation, 0, *Result.SourceManager,
45  Result.Context->getLangOpts()),
46  DefaultArgRange.getEnd());
47 
48  diag(D->getBeginLoc(),
49  "declaring a parameter with a default argument is disallowed")
50  << D << FixItHint::CreateRemoval(RemovalRange);
51 }
52 
53 } // namespace fuchsia
54 } // namespace tidy
55 } // namespace clang
clang::ast_matchers
Definition: AbseilMatcher.h:14
DefaultArgumentsDeclarationsCheck.h
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition: ApplyReplacements.h:27