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1 //===--- DeprecatedIosBaseAliasesCheck.cpp - clang-tidy--------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "DeprecatedIosBaseAliasesCheck.h"
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10 #include "clang/AST/ASTContext.h"
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11 #include "clang/ASTMatchers/ASTMatchFinder.h"
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12
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13 using namespace clang::ast_matchers;
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14
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15 namespace clang {
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16 namespace tidy {
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17 namespace modernize {
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18
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173
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19 static constexpr std::array<StringRef, 5> DeprecatedTypes = {
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20 "::std::ios_base::io_state", "::std::ios_base::open_mode",
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21 "::std::ios_base::seek_dir", "::std::ios_base::streamoff",
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22 "::std::ios_base::streampos"};
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150
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23
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173
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24 static llvm::Optional<const char *> getReplacementType(StringRef Type) {
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25 return llvm::StringSwitch<llvm::Optional<const char *>>(Type)
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26 .Case("io_state", "iostate")
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27 .Case("open_mode", "openmode")
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28 .Case("seek_dir", "seekdir")
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29 .Default(llvm::None);
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30 }
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31
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32 void DeprecatedIosBaseAliasesCheck::registerMatchers(MatchFinder *Finder) {
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33 auto IoStateDecl = typedefDecl(hasAnyName(DeprecatedTypes)).bind("TypeDecl");
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34 auto IoStateType =
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35 qualType(hasDeclaration(IoStateDecl), unless(elaboratedType()));
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36
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37 Finder->addMatcher(typeLoc(loc(IoStateType)).bind("TypeLoc"), this);
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38 }
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39
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40 void DeprecatedIosBaseAliasesCheck::check(
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41 const MatchFinder::MatchResult &Result) {
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42 SourceManager &SM = *Result.SourceManager;
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43
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44 const auto *Typedef = Result.Nodes.getNodeAs<TypedefDecl>("TypeDecl");
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45 StringRef TypeName = Typedef->getName();
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46 auto Replacement = getReplacementType(TypeName);
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47
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48 const auto *TL = Result.Nodes.getNodeAs<TypeLoc>("TypeLoc");
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49 SourceLocation IoStateLoc = TL->getBeginLoc();
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50
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51 // Do not generate fixits for matches depending on template arguments and
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52 // macro expansions.
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173
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53 bool Fix = Replacement && !TL->getType()->isDependentType();
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54 if (IoStateLoc.isMacroID()) {
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55 IoStateLoc = SM.getSpellingLoc(IoStateLoc);
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56 Fix = false;
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57 }
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58
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59 SourceLocation EndLoc = IoStateLoc.getLocWithOffset(TypeName.size() - 1);
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60
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173
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61 if (Replacement) {
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62 auto FixName = *Replacement;
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63 auto Builder = diag(IoStateLoc, "'std::ios_base::%0' is deprecated; use "
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64 "'std::ios_base::%1' instead")
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65 << TypeName << FixName;
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66
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67 if (Fix)
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68 Builder << FixItHint::CreateReplacement(SourceRange(IoStateLoc, EndLoc),
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69 FixName);
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70 } else
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71 diag(IoStateLoc, "'std::ios_base::%0' is deprecated") << TypeName;
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72 }
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73
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74 } // namespace modernize
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75 } // namespace tidy
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76 } // namespace clang
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