77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
//===--- DeprecatedIosBaseAliasesCheck.cpp - clang-tidy--------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DeprecatedIosBaseAliasesCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace modernize {
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static constexpr std::array<StringRef, 5> DeprecatedTypes = {
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"::std::ios_base::io_state", "::std::ios_base::open_mode",
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"::std::ios_base::seek_dir", "::std::ios_base::streamoff",
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"::std::ios_base::streampos"};
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static llvm::Optional<const char *> getReplacementType(StringRef Type) {
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return llvm::StringSwitch<llvm::Optional<const char *>>(Type)
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.Case("io_state", "iostate")
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.Case("open_mode", "openmode")
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.Case("seek_dir", "seekdir")
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.Default(llvm::None);
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}
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void DeprecatedIosBaseAliasesCheck::registerMatchers(MatchFinder *Finder) {
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auto IoStateDecl = typedefDecl(hasAnyName(DeprecatedTypes)).bind("TypeDecl");
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auto IoStateType =
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qualType(hasDeclaration(IoStateDecl), unless(elaboratedType()));
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Finder->addMatcher(typeLoc(loc(IoStateType)).bind("TypeLoc"), this);
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}
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void DeprecatedIosBaseAliasesCheck::check(
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const MatchFinder::MatchResult &Result) {
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SourceManager &SM = *Result.SourceManager;
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const auto *Typedef = Result.Nodes.getNodeAs<TypedefDecl>("TypeDecl");
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StringRef TypeName = Typedef->getName();
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auto Replacement = getReplacementType(TypeName);
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const auto *TL = Result.Nodes.getNodeAs<TypeLoc>("TypeLoc");
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SourceLocation IoStateLoc = TL->getBeginLoc();
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// Do not generate fixits for matches depending on template arguments and
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// macro expansions.
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bool Fix = Replacement && !TL->getType()->isDependentType();
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if (IoStateLoc.isMacroID()) {
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IoStateLoc = SM.getSpellingLoc(IoStateLoc);
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Fix = false;
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}
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SourceLocation EndLoc = IoStateLoc.getLocWithOffset(TypeName.size() - 1);
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if (Replacement) {
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const char *FixName = *Replacement;
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auto Builder = diag(IoStateLoc, "'std::ios_base::%0' is deprecated; use "
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"'std::ios_base::%1' instead")
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<< TypeName << FixName;
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if (Fix)
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Builder << FixItHint::CreateReplacement(SourceRange(IoStateLoc, EndLoc),
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FixName);
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} else
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diag(IoStateLoc, "'std::ios_base::%0' is deprecated") << TypeName;
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}
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} // namespace modernize
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} // namespace tidy
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} // namespace clang
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