clang-tools  10.0.0git
DeprecatedIosBaseAliasesCheck.cpp
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1 //===--- DeprecatedIosBaseAliasesCheck.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 modernize {
18 
19 static const llvm::SmallVector<StringRef, 5> DeprecatedTypes = {
20  {"::std::ios_base::io_state"},
21  {"::std::ios_base::open_mode"},
22  {"::std::ios_base::seek_dir"},
23  {"::std::ios_base::streamoff"},
24  {"::std::ios_base::streampos"}};
25 
26 static const llvm::StringMap<StringRef> ReplacementTypes = {
27  {"io_state", "iostate"},
28  {"open_mode", "openmode"},
29  {"seek_dir", "seekdir"}};
30 
31 void DeprecatedIosBaseAliasesCheck::registerMatchers(MatchFinder *Finder) {
32  // Only register the matchers for C++; the functionality currently does not
33  // provide any benefit to other languages, despite being benign.
34  if (!getLangOpts().CPlusPlus)
35  return;
36 
37  auto IoStateDecl = typedefDecl(hasAnyName(DeprecatedTypes)).bind("TypeDecl");
38  auto IoStateType =
39  qualType(hasDeclaration(IoStateDecl), unless(elaboratedType()));
40 
41  Finder->addMatcher(typeLoc(loc(IoStateType)).bind("TypeLoc"), this);
42 }
43 
44 void DeprecatedIosBaseAliasesCheck::check(
45  const MatchFinder::MatchResult &Result) {
46  SourceManager &SM = *Result.SourceManager;
47 
48  const auto *Typedef = Result.Nodes.getNodeAs<TypedefDecl>("TypeDecl");
49  StringRef TypeName = Typedef->getName();
50  bool HasReplacement = ReplacementTypes.count(TypeName);
51 
52  const auto *TL = Result.Nodes.getNodeAs<TypeLoc>("TypeLoc");
53  SourceLocation IoStateLoc = TL->getBeginLoc();
54 
55  // Do not generate fixits for matches depending on template arguments and
56  // macro expansions.
57  bool Fix = HasReplacement && !TL->getType()->isDependentType();
58  if (IoStateLoc.isMacroID()) {
59  IoStateLoc = SM.getSpellingLoc(IoStateLoc);
60  Fix = false;
61  }
62 
63  SourceLocation EndLoc = IoStateLoc.getLocWithOffset(TypeName.size() - 1);
64 
65  if (HasReplacement) {
66  auto FixName = ReplacementTypes.lookup(TypeName);
67  auto Builder = diag(IoStateLoc, "'std::ios_base::%0' is deprecated; use "
68  "'std::ios_base::%1' instead")
69  << TypeName << FixName;
70 
71  if (Fix)
72  Builder << FixItHint::CreateReplacement(SourceRange(IoStateLoc, EndLoc),
73  FixName);
74  } else
75  diag(IoStateLoc, "'std::ios_base::%0' is deprecated") << TypeName;
76 }
77 
78 } // namespace modernize
79 } // namespace tidy
80 } // namespace clang
static const llvm::StringMap< StringRef > ReplacementTypes
static const llvm::SmallVector< StringRef, 5 > DeprecatedTypes
CodeCompletionBuilder Builder
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
static cl::opt< bool > Fix("fix", cl::desc(R"( Apply suggested fixes. Without -fix-errors clang-tidy will bail out if any compilation errors were found. )"), cl::init(false), cl::cat(ClangTidyCategory))