clang-tools  10.0.0git
UseToStringCheck.cpp
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1 //===--- UseToStringCheck.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 "UseToStringCheck.h"
10 
11 using namespace clang::ast_matchers;
12 
13 namespace clang {
14 namespace tidy {
15 namespace boost {
16 
17 namespace {
18 AST_MATCHER(Type, isStrictlyInteger) {
19  return Node.isIntegerType() && !Node.isAnyCharacterType() &&
20  !Node.isBooleanType();
21 }
22 } // namespace
23 
24 void UseToStringCheck::registerMatchers(MatchFinder *Finder) {
25  if (!getLangOpts().CPlusPlus)
26  return;
27 
28  Finder->addMatcher(
29  callExpr(
30  hasDeclaration(functionDecl(
31  returns(hasDeclaration(classTemplateSpecializationDecl(
32  hasName("std::basic_string"),
33  hasTemplateArgument(0,
34  templateArgument().bind("char_type"))))),
35  hasName("boost::lexical_cast"),
36  hasParameter(0, hasType(qualType(has(substTemplateTypeParmType(
37  isStrictlyInteger()))))))),
38  argumentCountIs(1), unless(isInTemplateInstantiation()))
39  .bind("to_string"),
40  this);
41 }
42 
43 void UseToStringCheck::check(const MatchFinder::MatchResult &Result) {
44  const auto *Call = Result.Nodes.getNodeAs<CallExpr>("to_string");
45  auto CharType =
46  Result.Nodes.getNodeAs<TemplateArgument>("char_type")->getAsType();
47 
48  StringRef StringType;
49  if (CharType->isSpecificBuiltinType(BuiltinType::Char_S) ||
50  CharType->isSpecificBuiltinType(BuiltinType::Char_U))
51  StringType = "string";
52  else if (CharType->isSpecificBuiltinType(BuiltinType::WChar_S) ||
53  CharType->isSpecificBuiltinType(BuiltinType::WChar_U))
54  StringType = "wstring";
55  else
56  return;
57 
58  auto Loc = Call->getBeginLoc();
59  auto Diag =
60  diag(Loc, "use std::to_%0 instead of boost::lexical_cast<std::%0>")
61  << StringType;
62 
63  if (Loc.isMacroID())
64  return;
65 
66  Diag << FixItHint::CreateReplacement(
67  CharSourceRange::getCharRange(Call->getBeginLoc(),
68  Call->getArg(0)->getBeginLoc()),
69  (llvm::Twine("std::to_") + StringType + "(").str());
70 }
71 
72 } // namespace boost
73 } // namespace tidy
74 } // namespace clang
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===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
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