102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
//===-- AddOverride/AddOverrideActions.cpp - add C++11 override -----------===//
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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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///
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/// \file
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/// \brief This file contains the definition of the AddOverrideFixer class
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/// which is used as an ASTMatcher callback.
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///
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//===----------------------------------------------------------------------===//
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#include "AddOverrideActions.h"
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#include "AddOverrideMatchers.h"
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#include "Core/Transform.h"
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#include "clang/Basic/CharInfo.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Attr.h"
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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/Lex/Lexer.h"
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#include "clang/Lex/Preprocessor.h"
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using namespace clang::ast_matchers;
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using namespace clang::tooling;
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using namespace clang;
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namespace {
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SourceLocation
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backwardSkipWhitespacesAndComments(const SourceManager &SM,
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const clang::ASTContext &Context,
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SourceLocation Loc) {
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for (;;) {
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do {
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Loc = Loc.getLocWithOffset(-1);
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} while (isWhitespace(*FullSourceLoc(Loc, SM).getCharacterData()));
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Token Tok;
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SourceLocation Beginning =
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Lexer::GetBeginningOfToken(Loc, SM, Context.getLangOpts());
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const bool Invalid =
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Lexer::getRawToken(Beginning, Tok, SM, Context.getLangOpts());
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assert(!Invalid && "Expected a valid token.");
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if (Invalid || Tok.getKind() != tok::comment)
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return Loc.getLocWithOffset(1);
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}
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}
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} // end anonymous namespace
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void AddOverrideFixer::run(const MatchFinder::MatchResult &Result) {
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SourceManager &SM = *Result.SourceManager;
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const CXXMethodDecl *M = Result.Nodes.getDeclAs<CXXMethodDecl>(MethodId);
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assert(M && "Bad Callback. No node provided");
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if (const FunctionDecl *TemplateMethod = M->getTemplateInstantiationPattern())
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M = cast<CXXMethodDecl>(TemplateMethod);
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if (!Owner.isFileModifiable(SM, M->getLocStart()))
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return;
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// First check that there isn't already an override attribute.
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if (M->hasAttr<OverrideAttr>())
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return;
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// FIXME: Pure methods are not supported yet as it is difficult to track down
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// the location of '= 0'.
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if (M->isPure())
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return;
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if (M->getParent()->hasAnyDependentBases())
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return;
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SourceLocation StartLoc;
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if (M->hasInlineBody()) {
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// Insert the override specifier before the function body.
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StartLoc = backwardSkipWhitespacesAndComments(SM, *Result.Context,
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M->getBody()->getLocStart());
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} else {
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StartLoc = SM.getSpellingLoc(M->getLocEnd());
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StartLoc = Lexer::getLocForEndOfToken(StartLoc, 0, SM, LangOptions());
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}
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std::string ReplacementText = " override";
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if (DetectMacros) {
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assert(PP != 0 && "No access to Preprocessor object for macro detection");
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clang::TokenValue Tokens[] = { PP->getIdentifierInfo("override") };
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llvm::StringRef MacroName = PP->getLastMacroWithSpelling(StartLoc, Tokens);
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if (!MacroName.empty())
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ReplacementText = (" " + MacroName).str();
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}
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Owner.addReplacementForCurrentTU(
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tooling::Replacement(SM, StartLoc, 0, ReplacementText));
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++AcceptedChanges;
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}
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