forked from OSchip/llvm-project
124 lines
4.5 KiB
C++
124 lines
4.5 KiB
C++
//===--- DeprecatedHeadersCheck.cpp - clang-tidy---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "DeprecatedHeadersCheck.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Lex/PPCallbacks.h"
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#include "clang/Lex/Preprocessor.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringSet.h"
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#include <vector>
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namespace clang {
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namespace tidy {
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namespace modernize {
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namespace {
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class IncludeModernizePPCallbacks : public PPCallbacks {
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public:
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explicit IncludeModernizePPCallbacks(ClangTidyCheck &Check,
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LangOptions LangOpts);
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void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok,
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StringRef FileName, bool IsAngled,
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CharSourceRange FilenameRange, const FileEntry *File,
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StringRef SearchPath, StringRef RelativePath,
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const Module *Imported) override;
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private:
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ClangTidyCheck &Check;
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LangOptions LangOpts;
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llvm::StringMap<std::string> CStyledHeaderToCxx;
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llvm::StringSet<> DeleteHeaders;
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};
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} // namespace
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void DeprecatedHeadersCheck::registerPPCallbacks(CompilerInstance &Compiler) {
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if (this->getLangOpts().CPlusPlus) {
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Compiler.getPreprocessor().addPPCallbacks(
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::llvm::make_unique<IncludeModernizePPCallbacks>(*this,
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this->getLangOpts()));
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}
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}
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IncludeModernizePPCallbacks::IncludeModernizePPCallbacks(ClangTidyCheck &Check,
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LangOptions LangOpts)
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: Check(Check), LangOpts(LangOpts) {
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for (const auto &KeyValue :
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std::vector<std::pair<llvm::StringRef, std::string>>(
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{{"assert.h", "cassert"},
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{"complex.h", "complex"},
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{"ctype.h", "cctype"},
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{"errno.h", "cerrno"},
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{"float.h", "cfloat"},
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{"limits.h", "climits"},
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{"locale.h", "clocale"},
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{"math.h", "cmath"},
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{"setjmp.h", "csetjmp"},
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{"signal.h", "csignal"},
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{"stdarg.h", "cstdarg"},
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{"stddef.h", "cstddef"},
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{"stdio.h", "cstdio"},
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{"stdlib.h", "cstdlib"},
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{"string.h", "cstring"},
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{"time.h", "ctime"},
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{"wchar.h", "cwchar"},
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{"wctype.h", "cwctype"}})) {
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CStyledHeaderToCxx.insert(KeyValue);
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}
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// Add C++ 11 headers.
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if (LangOpts.CPlusPlus11) {
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for (const auto &KeyValue :
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std::vector<std::pair<llvm::StringRef, std::string>>(
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{{"fenv.h", "cfenv"},
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{"stdint.h", "cstdint"},
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{"inttypes.h", "cinttypes"},
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{"tgmath.h", "ctgmath"},
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{"uchar.h", "cuchar"}})) {
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CStyledHeaderToCxx.insert(KeyValue);
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}
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}
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for (const auto &Key :
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std::vector<std::string>({"stdalign.h", "stdbool.h", "iso646.h"})) {
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DeleteHeaders.insert(Key);
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}
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}
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void IncludeModernizePPCallbacks::InclusionDirective(
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SourceLocation HashLoc, const Token &IncludeTok, StringRef FileName,
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bool IsAngled, CharSourceRange FilenameRange, const FileEntry *File,
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StringRef SearchPath, StringRef RelativePath, const Module *Imported) {
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// FIXME: Take care of library symbols from the global namespace.
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//
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// Reasonable options for the check:
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//
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// 1. Insert std prefix for every such symbol occurrence.
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// 2. Insert `using namespace std;` to the beginning of TU.
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// 3. Do nothing and let the user deal with the migration himself.
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if (CStyledHeaderToCxx.count(FileName) != 0) {
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std::string Replacement =
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(llvm::Twine("<") + CStyledHeaderToCxx[FileName] + ">").str();
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Check.diag(FilenameRange.getBegin(), "inclusion of deprecated C++ header "
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"'%0'; consider using '%1' instead")
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<< FileName << CStyledHeaderToCxx[FileName]
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<< FixItHint::CreateReplacement(FilenameRange.getAsRange(),
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Replacement);
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} else if (DeleteHeaders.count(FileName) != 0) {
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Check.diag(FilenameRange.getBegin(),
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"including '%0' has no effect in C++; consider removing it")
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<< FileName << FixItHint::CreateRemoval(
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SourceRange(HashLoc, FilenameRange.getEnd()));
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}
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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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