mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2024-12-05 21:12:31 +00:00
13156b689e
llvm-svn: 222306
696 lines
23 KiB
C++
696 lines
23 KiB
C++
//===--- ARCMT.cpp - Migration to ARC mode --------------------------------===//
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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 "Internals.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Expr.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Lex/Preprocessor.h"
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#include "llvm/ADT/DenseSet.h"
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#include <map>
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using namespace clang;
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using namespace arcmt;
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namespace {
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/// \brief Collects transformations and merges them before applying them with
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/// with applyRewrites(). E.g. if the same source range
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/// is requested to be removed twice, only one rewriter remove will be invoked.
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/// Rewrites happen in "transactions"; if one rewrite in the transaction cannot
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/// be done (e.g. it resides in a macro) all rewrites in the transaction are
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/// aborted.
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/// FIXME: "Transactional" rewrites support should be baked in the Rewriter.
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class TransformActionsImpl {
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CapturedDiagList &CapturedDiags;
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ASTContext &Ctx;
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Preprocessor &PP;
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bool IsInTransaction;
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enum ActionKind {
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Act_Insert, Act_InsertAfterToken,
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Act_Remove, Act_RemoveStmt,
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Act_Replace, Act_ReplaceText,
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Act_IncreaseIndentation,
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Act_ClearDiagnostic
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};
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struct ActionData {
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ActionKind Kind;
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SourceLocation Loc;
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SourceRange R1, R2;
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StringRef Text1, Text2;
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Stmt *S;
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SmallVector<unsigned, 2> DiagIDs;
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};
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std::vector<ActionData> CachedActions;
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enum RangeComparison {
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Range_Before,
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Range_After,
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Range_Contains,
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Range_Contained,
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Range_ExtendsBegin,
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Range_ExtendsEnd
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};
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/// \brief A range to remove. It is a character range.
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struct CharRange {
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FullSourceLoc Begin, End;
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CharRange(CharSourceRange range, SourceManager &srcMgr, Preprocessor &PP) {
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SourceLocation beginLoc = range.getBegin(), endLoc = range.getEnd();
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assert(beginLoc.isValid() && endLoc.isValid());
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if (range.isTokenRange()) {
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Begin = FullSourceLoc(srcMgr.getExpansionLoc(beginLoc), srcMgr);
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End = FullSourceLoc(getLocForEndOfToken(endLoc, srcMgr, PP), srcMgr);
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} else {
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Begin = FullSourceLoc(srcMgr.getExpansionLoc(beginLoc), srcMgr);
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End = FullSourceLoc(srcMgr.getExpansionLoc(endLoc), srcMgr);
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}
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assert(Begin.isValid() && End.isValid());
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}
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RangeComparison compareWith(const CharRange &RHS) const {
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if (End.isBeforeInTranslationUnitThan(RHS.Begin))
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return Range_Before;
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if (RHS.End.isBeforeInTranslationUnitThan(Begin))
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return Range_After;
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if (!Begin.isBeforeInTranslationUnitThan(RHS.Begin) &&
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!RHS.End.isBeforeInTranslationUnitThan(End))
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return Range_Contained;
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if (Begin.isBeforeInTranslationUnitThan(RHS.Begin) &&
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RHS.End.isBeforeInTranslationUnitThan(End))
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return Range_Contains;
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if (Begin.isBeforeInTranslationUnitThan(RHS.Begin))
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return Range_ExtendsBegin;
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else
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return Range_ExtendsEnd;
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}
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static RangeComparison compare(SourceRange LHS, SourceRange RHS,
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SourceManager &SrcMgr, Preprocessor &PP) {
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return CharRange(CharSourceRange::getTokenRange(LHS), SrcMgr, PP)
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.compareWith(CharRange(CharSourceRange::getTokenRange(RHS),
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SrcMgr, PP));
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}
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};
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typedef SmallVector<StringRef, 2> TextsVec;
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typedef std::map<FullSourceLoc, TextsVec, FullSourceLoc::BeforeThanCompare>
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InsertsMap;
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InsertsMap Inserts;
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/// \brief A list of ranges to remove. They are always sorted and they never
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/// intersect with each other.
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std::list<CharRange> Removals;
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llvm::DenseSet<Stmt *> StmtRemovals;
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std::vector<std::pair<CharRange, SourceLocation> > IndentationRanges;
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/// \brief Keeps text passed to transformation methods.
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llvm::StringMap<bool> UniqueText;
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public:
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TransformActionsImpl(CapturedDiagList &capturedDiags,
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ASTContext &ctx, Preprocessor &PP)
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: CapturedDiags(capturedDiags), Ctx(ctx), PP(PP), IsInTransaction(false) { }
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ASTContext &getASTContext() { return Ctx; }
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void startTransaction();
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bool commitTransaction();
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void abortTransaction();
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bool isInTransaction() const { return IsInTransaction; }
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void insert(SourceLocation loc, StringRef text);
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void insertAfterToken(SourceLocation loc, StringRef text);
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void remove(SourceRange range);
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void removeStmt(Stmt *S);
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void replace(SourceRange range, StringRef text);
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void replace(SourceRange range, SourceRange replacementRange);
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void replaceStmt(Stmt *S, StringRef text);
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void replaceText(SourceLocation loc, StringRef text,
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StringRef replacementText);
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void increaseIndentation(SourceRange range,
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SourceLocation parentIndent);
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bool clearDiagnostic(ArrayRef<unsigned> IDs, SourceRange range);
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void applyRewrites(TransformActions::RewriteReceiver &receiver);
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private:
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bool canInsert(SourceLocation loc);
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bool canInsertAfterToken(SourceLocation loc);
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bool canRemoveRange(SourceRange range);
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bool canReplaceRange(SourceRange range, SourceRange replacementRange);
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bool canReplaceText(SourceLocation loc, StringRef text);
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void commitInsert(SourceLocation loc, StringRef text);
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void commitInsertAfterToken(SourceLocation loc, StringRef text);
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void commitRemove(SourceRange range);
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void commitRemoveStmt(Stmt *S);
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void commitReplace(SourceRange range, SourceRange replacementRange);
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void commitReplaceText(SourceLocation loc, StringRef text,
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StringRef replacementText);
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void commitIncreaseIndentation(SourceRange range,SourceLocation parentIndent);
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void commitClearDiagnostic(ArrayRef<unsigned> IDs, SourceRange range);
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void addRemoval(CharSourceRange range);
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void addInsertion(SourceLocation loc, StringRef text);
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/// \brief Stores text passed to the transformation methods to keep the string
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/// "alive". Since the vast majority of text will be the same, we also unique
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/// the strings using a StringMap.
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StringRef getUniqueText(StringRef text);
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/// \brief Computes the source location just past the end of the token at
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/// the given source location. If the location points at a macro, the whole
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/// macro expansion is skipped.
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static SourceLocation getLocForEndOfToken(SourceLocation loc,
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SourceManager &SM,Preprocessor &PP);
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};
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} // anonymous namespace
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void TransformActionsImpl::startTransaction() {
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assert(!IsInTransaction &&
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"Cannot start a transaction in the middle of another one");
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IsInTransaction = true;
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}
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bool TransformActionsImpl::commitTransaction() {
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assert(IsInTransaction && "No transaction started");
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if (CachedActions.empty()) {
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IsInTransaction = false;
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return false;
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}
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// Verify that all actions are possible otherwise abort the whole transaction.
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bool AllActionsPossible = true;
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for (unsigned i = 0, e = CachedActions.size(); i != e; ++i) {
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ActionData &act = CachedActions[i];
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switch (act.Kind) {
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case Act_Insert:
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if (!canInsert(act.Loc))
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AllActionsPossible = false;
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break;
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case Act_InsertAfterToken:
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if (!canInsertAfterToken(act.Loc))
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AllActionsPossible = false;
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break;
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case Act_Remove:
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if (!canRemoveRange(act.R1))
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AllActionsPossible = false;
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break;
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case Act_RemoveStmt:
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assert(act.S);
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if (!canRemoveRange(act.S->getSourceRange()))
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AllActionsPossible = false;
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break;
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case Act_Replace:
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if (!canReplaceRange(act.R1, act.R2))
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AllActionsPossible = false;
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break;
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case Act_ReplaceText:
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if (!canReplaceText(act.Loc, act.Text1))
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AllActionsPossible = false;
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break;
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case Act_IncreaseIndentation:
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// This is not important, we don't care if it will fail.
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break;
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case Act_ClearDiagnostic:
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// We are just checking source rewrites.
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break;
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}
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if (!AllActionsPossible)
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break;
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}
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if (!AllActionsPossible) {
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abortTransaction();
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return true;
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}
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for (unsigned i = 0, e = CachedActions.size(); i != e; ++i) {
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ActionData &act = CachedActions[i];
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switch (act.Kind) {
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case Act_Insert:
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commitInsert(act.Loc, act.Text1);
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break;
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case Act_InsertAfterToken:
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commitInsertAfterToken(act.Loc, act.Text1);
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break;
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case Act_Remove:
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commitRemove(act.R1);
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break;
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case Act_RemoveStmt:
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commitRemoveStmt(act.S);
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break;
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case Act_Replace:
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commitReplace(act.R1, act.R2);
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break;
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case Act_ReplaceText:
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commitReplaceText(act.Loc, act.Text1, act.Text2);
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break;
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case Act_IncreaseIndentation:
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commitIncreaseIndentation(act.R1, act.Loc);
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break;
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case Act_ClearDiagnostic:
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commitClearDiagnostic(act.DiagIDs, act.R1);
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break;
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}
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}
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CachedActions.clear();
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IsInTransaction = false;
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return false;
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}
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void TransformActionsImpl::abortTransaction() {
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assert(IsInTransaction && "No transaction started");
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CachedActions.clear();
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IsInTransaction = false;
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}
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void TransformActionsImpl::insert(SourceLocation loc, StringRef text) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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text = getUniqueText(text);
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ActionData data;
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data.Kind = Act_Insert;
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data.Loc = loc;
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data.Text1 = text;
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CachedActions.push_back(data);
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}
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void TransformActionsImpl::insertAfterToken(SourceLocation loc, StringRef text) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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text = getUniqueText(text);
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ActionData data;
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data.Kind = Act_InsertAfterToken;
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data.Loc = loc;
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data.Text1 = text;
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CachedActions.push_back(data);
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}
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void TransformActionsImpl::remove(SourceRange range) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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ActionData data;
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data.Kind = Act_Remove;
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data.R1 = range;
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CachedActions.push_back(data);
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}
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void TransformActionsImpl::removeStmt(Stmt *S) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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ActionData data;
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data.Kind = Act_RemoveStmt;
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data.S = S->IgnoreImplicit(); // important for uniquing
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CachedActions.push_back(data);
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}
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void TransformActionsImpl::replace(SourceRange range, StringRef text) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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text = getUniqueText(text);
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remove(range);
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insert(range.getBegin(), text);
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}
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void TransformActionsImpl::replace(SourceRange range,
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SourceRange replacementRange) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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ActionData data;
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data.Kind = Act_Replace;
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data.R1 = range;
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data.R2 = replacementRange;
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CachedActions.push_back(data);
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}
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void TransformActionsImpl::replaceText(SourceLocation loc, StringRef text,
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StringRef replacementText) {
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text = getUniqueText(text);
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replacementText = getUniqueText(replacementText);
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ActionData data;
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data.Kind = Act_ReplaceText;
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data.Loc = loc;
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data.Text1 = text;
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data.Text2 = replacementText;
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CachedActions.push_back(data);
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}
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void TransformActionsImpl::replaceStmt(Stmt *S, StringRef text) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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text = getUniqueText(text);
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insert(S->getLocStart(), text);
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removeStmt(S);
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}
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void TransformActionsImpl::increaseIndentation(SourceRange range,
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SourceLocation parentIndent) {
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if (range.isInvalid()) return;
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assert(IsInTransaction && "Actions only allowed during a transaction");
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ActionData data;
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data.Kind = Act_IncreaseIndentation;
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data.R1 = range;
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data.Loc = parentIndent;
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CachedActions.push_back(data);
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}
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bool TransformActionsImpl::clearDiagnostic(ArrayRef<unsigned> IDs,
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SourceRange range) {
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assert(IsInTransaction && "Actions only allowed during a transaction");
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if (!CapturedDiags.hasDiagnostic(IDs, range))
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return false;
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ActionData data;
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data.Kind = Act_ClearDiagnostic;
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data.R1 = range;
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data.DiagIDs.append(IDs.begin(), IDs.end());
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CachedActions.push_back(data);
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return true;
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}
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bool TransformActionsImpl::canInsert(SourceLocation loc) {
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if (loc.isInvalid())
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return false;
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SourceManager &SM = Ctx.getSourceManager();
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if (SM.isInSystemHeader(SM.getExpansionLoc(loc)))
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return false;
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if (loc.isFileID())
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return true;
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return PP.isAtStartOfMacroExpansion(loc);
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}
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bool TransformActionsImpl::canInsertAfterToken(SourceLocation loc) {
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if (loc.isInvalid())
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return false;
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SourceManager &SM = Ctx.getSourceManager();
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if (SM.isInSystemHeader(SM.getExpansionLoc(loc)))
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return false;
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if (loc.isFileID())
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return true;
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return PP.isAtEndOfMacroExpansion(loc);
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}
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bool TransformActionsImpl::canRemoveRange(SourceRange range) {
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return canInsert(range.getBegin()) && canInsertAfterToken(range.getEnd());
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}
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bool TransformActionsImpl::canReplaceRange(SourceRange range,
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SourceRange replacementRange) {
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return canRemoveRange(range) && canRemoveRange(replacementRange);
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}
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bool TransformActionsImpl::canReplaceText(SourceLocation loc, StringRef text) {
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if (!canInsert(loc))
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return false;
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SourceManager &SM = Ctx.getSourceManager();
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loc = SM.getExpansionLoc(loc);
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// Break down the source location.
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std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(loc);
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// Try to load the file buffer.
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bool invalidTemp = false;
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StringRef file = SM.getBufferData(locInfo.first, &invalidTemp);
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if (invalidTemp)
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return false;
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return file.substr(locInfo.second).startswith(text);
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}
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void TransformActionsImpl::commitInsert(SourceLocation loc, StringRef text) {
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addInsertion(loc, text);
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}
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void TransformActionsImpl::commitInsertAfterToken(SourceLocation loc,
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StringRef text) {
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addInsertion(getLocForEndOfToken(loc, Ctx.getSourceManager(), PP), text);
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}
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void TransformActionsImpl::commitRemove(SourceRange range) {
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addRemoval(CharSourceRange::getTokenRange(range));
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}
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void TransformActionsImpl::commitRemoveStmt(Stmt *S) {
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assert(S);
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if (StmtRemovals.count(S))
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return; // already removed.
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if (Expr *E = dyn_cast<Expr>(S)) {
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commitRemove(E->getSourceRange());
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commitInsert(E->getSourceRange().getBegin(), getARCMTMacroName());
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} else
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commitRemove(S->getSourceRange());
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StmtRemovals.insert(S);
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}
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void TransformActionsImpl::commitReplace(SourceRange range,
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SourceRange replacementRange) {
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RangeComparison comp = CharRange::compare(replacementRange, range,
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Ctx.getSourceManager(), PP);
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assert(comp == Range_Contained);
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if (comp != Range_Contained)
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return; // Although we asserted, be extra safe for release build.
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if (range.getBegin() != replacementRange.getBegin())
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addRemoval(CharSourceRange::getCharRange(range.getBegin(),
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replacementRange.getBegin()));
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if (replacementRange.getEnd() != range.getEnd())
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addRemoval(CharSourceRange::getTokenRange(
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getLocForEndOfToken(replacementRange.getEnd(),
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Ctx.getSourceManager(), PP),
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range.getEnd()));
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}
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void TransformActionsImpl::commitReplaceText(SourceLocation loc,
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StringRef text,
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StringRef replacementText) {
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SourceManager &SM = Ctx.getSourceManager();
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loc = SM.getExpansionLoc(loc);
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// canReplaceText already checked if loc points at text.
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SourceLocation afterText = loc.getLocWithOffset(text.size());
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addRemoval(CharSourceRange::getCharRange(loc, afterText));
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commitInsert(loc, replacementText);
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}
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void TransformActionsImpl::commitIncreaseIndentation(SourceRange range,
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SourceLocation parentIndent) {
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SourceManager &SM = Ctx.getSourceManager();
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IndentationRanges.push_back(
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std::make_pair(CharRange(CharSourceRange::getTokenRange(range),
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SM, PP),
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SM.getExpansionLoc(parentIndent)));
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}
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void TransformActionsImpl::commitClearDiagnostic(ArrayRef<unsigned> IDs,
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SourceRange range) {
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CapturedDiags.clearDiagnostic(IDs, range);
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}
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void TransformActionsImpl::addInsertion(SourceLocation loc, StringRef text) {
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SourceManager &SM = Ctx.getSourceManager();
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loc = SM.getExpansionLoc(loc);
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for (std::list<CharRange>::reverse_iterator
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I = Removals.rbegin(), E = Removals.rend(); I != E; ++I) {
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if (!SM.isBeforeInTranslationUnit(loc, I->End))
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break;
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if (I->Begin.isBeforeInTranslationUnitThan(loc))
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return;
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}
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Inserts[FullSourceLoc(loc, SM)].push_back(text);
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}
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void TransformActionsImpl::addRemoval(CharSourceRange range) {
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CharRange newRange(range, Ctx.getSourceManager(), PP);
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if (newRange.Begin == newRange.End)
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return;
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Inserts.erase(Inserts.upper_bound(newRange.Begin),
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Inserts.lower_bound(newRange.End));
|
|
|
|
std::list<CharRange>::iterator I = Removals.end();
|
|
while (I != Removals.begin()) {
|
|
std::list<CharRange>::iterator RI = I;
|
|
--RI;
|
|
RangeComparison comp = newRange.compareWith(*RI);
|
|
switch (comp) {
|
|
case Range_Before:
|
|
--I;
|
|
break;
|
|
case Range_After:
|
|
Removals.insert(I, newRange);
|
|
return;
|
|
case Range_Contained:
|
|
return;
|
|
case Range_Contains:
|
|
RI->End = newRange.End;
|
|
case Range_ExtendsBegin:
|
|
newRange.End = RI->End;
|
|
Removals.erase(RI);
|
|
break;
|
|
case Range_ExtendsEnd:
|
|
RI->End = newRange.End;
|
|
return;
|
|
}
|
|
}
|
|
|
|
Removals.insert(Removals.begin(), newRange);
|
|
}
|
|
|
|
void TransformActionsImpl::applyRewrites(
|
|
TransformActions::RewriteReceiver &receiver) {
|
|
for (InsertsMap::iterator I = Inserts.begin(), E = Inserts.end(); I!=E; ++I) {
|
|
SourceLocation loc = I->first;
|
|
for (TextsVec::iterator
|
|
TI = I->second.begin(), TE = I->second.end(); TI != TE; ++TI) {
|
|
receiver.insert(loc, *TI);
|
|
}
|
|
}
|
|
|
|
for (std::vector<std::pair<CharRange, SourceLocation> >::iterator
|
|
I = IndentationRanges.begin(), E = IndentationRanges.end(); I!=E; ++I) {
|
|
CharSourceRange range = CharSourceRange::getCharRange(I->first.Begin,
|
|
I->first.End);
|
|
receiver.increaseIndentation(range, I->second);
|
|
}
|
|
|
|
for (std::list<CharRange>::iterator
|
|
I = Removals.begin(), E = Removals.end(); I != E; ++I) {
|
|
CharSourceRange range = CharSourceRange::getCharRange(I->Begin, I->End);
|
|
receiver.remove(range);
|
|
}
|
|
}
|
|
|
|
/// \brief Stores text passed to the transformation methods to keep the string
|
|
/// "alive". Since the vast majority of text will be the same, we also unique
|
|
/// the strings using a StringMap.
|
|
StringRef TransformActionsImpl::getUniqueText(StringRef text) {
|
|
return UniqueText.insert(std::make_pair(text, false)).first->first();
|
|
}
|
|
|
|
/// \brief Computes the source location just past the end of the token at
|
|
/// the given source location. If the location points at a macro, the whole
|
|
/// macro expansion is skipped.
|
|
SourceLocation TransformActionsImpl::getLocForEndOfToken(SourceLocation loc,
|
|
SourceManager &SM,
|
|
Preprocessor &PP) {
|
|
if (loc.isMacroID())
|
|
loc = SM.getExpansionRange(loc).second;
|
|
return PP.getLocForEndOfToken(loc);
|
|
}
|
|
|
|
TransformActions::RewriteReceiver::~RewriteReceiver() { }
|
|
|
|
TransformActions::TransformActions(DiagnosticsEngine &diag,
|
|
CapturedDiagList &capturedDiags,
|
|
ASTContext &ctx, Preprocessor &PP)
|
|
: Diags(diag), CapturedDiags(capturedDiags) {
|
|
Impl = new TransformActionsImpl(capturedDiags, ctx, PP);
|
|
}
|
|
|
|
TransformActions::~TransformActions() {
|
|
delete static_cast<TransformActionsImpl*>(Impl);
|
|
}
|
|
|
|
void TransformActions::startTransaction() {
|
|
static_cast<TransformActionsImpl*>(Impl)->startTransaction();
|
|
}
|
|
|
|
bool TransformActions::commitTransaction() {
|
|
return static_cast<TransformActionsImpl*>(Impl)->commitTransaction();
|
|
}
|
|
|
|
void TransformActions::abortTransaction() {
|
|
static_cast<TransformActionsImpl*>(Impl)->abortTransaction();
|
|
}
|
|
|
|
|
|
void TransformActions::insert(SourceLocation loc, StringRef text) {
|
|
static_cast<TransformActionsImpl*>(Impl)->insert(loc, text);
|
|
}
|
|
|
|
void TransformActions::insertAfterToken(SourceLocation loc,
|
|
StringRef text) {
|
|
static_cast<TransformActionsImpl*>(Impl)->insertAfterToken(loc, text);
|
|
}
|
|
|
|
void TransformActions::remove(SourceRange range) {
|
|
static_cast<TransformActionsImpl*>(Impl)->remove(range);
|
|
}
|
|
|
|
void TransformActions::removeStmt(Stmt *S) {
|
|
static_cast<TransformActionsImpl*>(Impl)->removeStmt(S);
|
|
}
|
|
|
|
void TransformActions::replace(SourceRange range, StringRef text) {
|
|
static_cast<TransformActionsImpl*>(Impl)->replace(range, text);
|
|
}
|
|
|
|
void TransformActions::replace(SourceRange range,
|
|
SourceRange replacementRange) {
|
|
static_cast<TransformActionsImpl*>(Impl)->replace(range, replacementRange);
|
|
}
|
|
|
|
void TransformActions::replaceStmt(Stmt *S, StringRef text) {
|
|
static_cast<TransformActionsImpl*>(Impl)->replaceStmt(S, text);
|
|
}
|
|
|
|
void TransformActions::replaceText(SourceLocation loc, StringRef text,
|
|
StringRef replacementText) {
|
|
static_cast<TransformActionsImpl*>(Impl)->replaceText(loc, text,
|
|
replacementText);
|
|
}
|
|
|
|
void TransformActions::increaseIndentation(SourceRange range,
|
|
SourceLocation parentIndent) {
|
|
static_cast<TransformActionsImpl*>(Impl)->increaseIndentation(range,
|
|
parentIndent);
|
|
}
|
|
|
|
bool TransformActions::clearDiagnostic(ArrayRef<unsigned> IDs,
|
|
SourceRange range) {
|
|
return static_cast<TransformActionsImpl*>(Impl)->clearDiagnostic(IDs, range);
|
|
}
|
|
|
|
void TransformActions::applyRewrites(RewriteReceiver &receiver) {
|
|
static_cast<TransformActionsImpl*>(Impl)->applyRewrites(receiver);
|
|
}
|
|
|
|
DiagnosticBuilder TransformActions::report(SourceLocation loc, unsigned diagId,
|
|
SourceRange range) {
|
|
assert(!static_cast<TransformActionsImpl *>(Impl)->isInTransaction() &&
|
|
"Errors should be emitted out of a transaction");
|
|
return Diags.Report(loc, diagId) << range;
|
|
}
|
|
|
|
void TransformActions::reportError(StringRef message, SourceLocation loc,
|
|
SourceRange range) {
|
|
report(loc, diag::err_mt_message, range) << message;
|
|
}
|
|
|
|
void TransformActions::reportWarning(StringRef message, SourceLocation loc,
|
|
SourceRange range) {
|
|
report(loc, diag::warn_mt_message, range) << message;
|
|
}
|
|
|
|
void TransformActions::reportNote(StringRef message, SourceLocation loc,
|
|
SourceRange range) {
|
|
report(loc, diag::note_mt_message, range) << message;
|
|
}
|