| Alexander Kornienko | 08936e4 | 2017-06-08 14:04:16 +0000 | [diff] [blame] | 1 | //===--- UseNoexceptCheck.cpp - clang-tidy---------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "UseNoexceptCheck.h" |
| 11 | #include "clang/AST/ASTContext.h" |
| 12 | #include "clang/Lex/Lexer.h" |
| 13 | |
| 14 | using namespace clang::ast_matchers; |
| 15 | |
| 16 | namespace clang { |
| 17 | namespace tidy { |
| 18 | namespace modernize { |
| 19 | |
| 20 | UseNoexceptCheck::UseNoexceptCheck(StringRef Name, ClangTidyContext *Context) |
| 21 | : ClangTidyCheck(Name, Context), |
| 22 | NoexceptMacro(Options.get("ReplacementString", "")), |
| 23 | UseNoexceptFalse(Options.get("UseNoexceptFalse", true)) {} |
| 24 | |
| 25 | void UseNoexceptCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) { |
| 26 | Options.store(Opts, "ReplacementString", NoexceptMacro); |
| 27 | Options.store(Opts, "UseNoexceptFalse", UseNoexceptFalse); |
| 28 | } |
| 29 | |
| 30 | void UseNoexceptCheck::registerMatchers(MatchFinder *Finder) { |
| 31 | if (!getLangOpts().CPlusPlus11) |
| 32 | return; |
| 33 | |
| 34 | Finder->addMatcher( |
| 35 | functionDecl( |
| 36 | cxxMethodDecl( |
| 37 | hasTypeLoc(loc(functionProtoType(hasDynamicExceptionSpec()))), |
| 38 | anyOf(hasOverloadedOperatorName("delete[]"), |
| 39 | hasOverloadedOperatorName("delete"), cxxDestructorDecl())) |
| 40 | .bind("del-dtor")) |
| 41 | .bind("funcDecl"), |
| 42 | this); |
| 43 | |
| 44 | Finder->addMatcher( |
| 45 | functionDecl( |
| 46 | hasTypeLoc(loc(functionProtoType(hasDynamicExceptionSpec()))), |
| 47 | unless(anyOf(hasOverloadedOperatorName("delete[]"), |
| 48 | hasOverloadedOperatorName("delete"), |
| 49 | cxxDestructorDecl()))) |
| 50 | .bind("funcDecl"), |
| 51 | this); |
| 52 | |
| 53 | Finder->addMatcher( |
| 54 | parmVarDecl(anyOf(hasType(pointerType(pointee(parenType(innerType( |
| 55 | functionProtoType(hasDynamicExceptionSpec())))))), |
| 56 | hasType(memberPointerType(pointee(parenType(innerType( |
| 57 | functionProtoType(hasDynamicExceptionSpec())))))))) |
| 58 | .bind("parmVarDecl"), |
| 59 | this); |
| 60 | } |
| 61 | |
| 62 | void UseNoexceptCheck::check(const MatchFinder::MatchResult &Result) { |
| 63 | const FunctionProtoType *FnTy = nullptr; |
| 64 | bool DtorOrOperatorDel = false; |
| 65 | SourceRange Range; |
| 66 | |
| 67 | if (const auto *FuncDecl = Result.Nodes.getNodeAs<FunctionDecl>("funcDecl")) { |
| 68 | DtorOrOperatorDel = Result.Nodes.getNodeAs<FunctionDecl>("del-dtor"); |
| 69 | FnTy = FuncDecl->getType()->getAs<FunctionProtoType>(); |
| 70 | if (const auto *TSI = FuncDecl->getTypeSourceInfo()) |
| 71 | Range = |
| 72 | TSI->getTypeLoc().castAs<FunctionTypeLoc>().getExceptionSpecRange(); |
| 73 | } else if (const auto *ParmDecl = |
| 74 | Result.Nodes.getNodeAs<ParmVarDecl>("parmVarDecl")) { |
| 75 | FnTy = ParmDecl->getType() |
| 76 | ->getAs<Type>() |
| 77 | ->getPointeeType() |
| 78 | ->getAs<FunctionProtoType>(); |
| 79 | |
| 80 | if (const auto *TSI = ParmDecl->getTypeSourceInfo()) |
| 81 | Range = TSI->getTypeLoc() |
| 82 | .getNextTypeLoc() |
| 83 | .IgnoreParens() |
| 84 | .castAs<FunctionProtoTypeLoc>() |
| 85 | .getExceptionSpecRange(); |
| 86 | } |
| 87 | CharSourceRange CRange = Lexer::makeFileCharRange( |
| 88 | CharSourceRange::getTokenRange(Range), *Result.SourceManager, |
| 89 | Result.Context->getLangOpts()); |
| 90 | |
| 91 | assert(FnTy && "FunctionProtoType is null."); |
| 92 | bool IsNoThrow = FnTy->isNothrow(*Result.Context); |
| 93 | StringRef ReplacementStr = |
| 94 | IsNoThrow |
| 95 | ? NoexceptMacro.empty() ? "noexcept" : NoexceptMacro.c_str() |
| 96 | : NoexceptMacro.empty() |
| 97 | ? (DtorOrOperatorDel || UseNoexceptFalse) ? "noexcept(false)" |
| 98 | : "" |
| 99 | : ""; |
| 100 | |
| 101 | FixItHint FixIt; |
| 102 | if ((IsNoThrow || NoexceptMacro.empty()) && CRange.isValid()) |
| 103 | FixIt = FixItHint::CreateReplacement(CRange, ReplacementStr); |
| 104 | |
| 105 | diag(Range.getBegin(), "dynamic exception specification '%0' is deprecated; " |
| 106 | "consider %select{using '%2'|removing it}1 instead") |
| 107 | << Lexer::getSourceText(CRange, *Result.SourceManager, |
| 108 | Result.Context->getLangOpts()) |
| 109 | << ReplacementStr.empty() << ReplacementStr << FixIt; |
| 110 | } |
| 111 | |
| 112 | } // namespace modernize |
| 113 | } // namespace tidy |
| 114 | } // namespace clang |