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diff --git a/cfe_extra.cpp b/cfe_extra.cpp
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+
+/***************************************************Project Mutator****************************************************/
+//-*-c++-*-
+/*first line intentionally left blank.*/
+/*Copyright (C) 2018 Farzad Sadeghi
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.*/
+/*********************************************************************************************************************/
+/*inclusion directives*/
+#include "cfe_extra.h"
+#include <algorithm>
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <iterator>
+#include "clang/AST/AST.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Rewrite/Core/Rewriter.h"
+/*********************************************************************************************************************/
+using namespace clang;
+/*********************************************************************************************************************/
+namespace Devi {
+/*a simple function that checks the sourcelocations for a macro expansion. returns the sourcelocation without
+macro expansion address.*/
+#if 1
+SourceLocation SourceLocationHasMacro [[deprecated("doesnt work")]] (SourceLocation SL, Rewriter &Rewrite, std::string Kind) {
+  /*does the sourcelocation include a macro expansion?*/
+  if ( SL.isMacroID()) {
+    /*get the expansion range which is startloc and endloc*/
+#if __clang_major__ <= 6
+    std::pair <SourceLocation, SourceLocation> expansionRange = Rewrite.getSourceMgr().getImmediateExpansionRange(SL);
+#elif __clang_major__ >= 8
+    CharSourceRange expansionRange = Rewrite.getSourceMgr().getImmediateExpansionRange(SL);
+#endif
+    if (Kind == "start") {
+#if __clang_major__ <= 6
+      return expansionRange.first;
+#elif __clang_major__ >= 8
+      return expansionRange.getBegin();
+#endif
+    } else if (Kind == "end") {
+#if __clang_major__ <= 6
+      return expansionRange.second;
+#elif __clang_major__ >= 8
+      return expansionRange.getEnd();
+#endif
+    } else {
+      std::cout << "the third argument of Devi::SourceLocationHasMacro is invalid." << std::endl;
+    }
+  } else {
+    return (SL);
+  }
+  return (SL);
+}
+#endif
+
+SourceLocation SourceLocationHasMacro(SourceLocation __sl, Rewriter &__rewrite) {
+  if (__sl.isMacroID()) {
+    return __rewrite.getSourceMgr().getSpellingLoc(__sl);
+  } else {
+    return __sl;
+  }
+}
+
+SourceLocation getSLSpellingLoc(SourceLocation __sl, Rewriter &__rewrite) {
+  if (__sl.isMacroID()) return __rewrite.getSourceMgr().getSpellingLoc(__sl);
+  else return __sl;
+}
+/*********************************************************************************************************************/
+/*********************************************************************************************************************/
+/*********************************************************************************************************************/
+/*the first argument is the option SysHeader from the mutator-lvl0 cl.*/
+bool IsTheMatchInSysHeader(bool SysHeaderFlag, const ast_matchers::MatchFinder::MatchResult &MR, SourceLocation SL) {
+  ASTContext *const ASTC = MR.Context;
+  const SourceManager &SM = ASTC->getSourceManager();
+
+  if (SM.isInSystemHeader(SL) && !SysHeaderFlag) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool IsTheMatchInSysHeader(bool SysHeaderFlag, const SourceManager &SM, SourceLocation SL) {
+  if (SM.isInSystemHeader(SL) && !SysHeaderFlag) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool IsTheMatchInSysHeader(bool SysHeaderFlag, bool SysHeader, SourceLocation SL) {
+  if (SysHeader && !SysHeaderFlag) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool IsTheMatchInSysHeader(bool SysHeaderFlag, bool SysHeader)
+{
+  if (SysHeader && !SysHeaderFlag) {
+    return true;
+  } else {
+    return false;
+  }
+}
+/*********************************************************************************************************************/
+/*********************************************************************************************************************/
+/*********************************************************************************************************************/
+bool IsTheMatchInMainFile(bool MainFileFlag, const ast_matchers::MatchFinder::MatchResult &MR, SourceLocation SL) {
+  ASTContext *const ASTC = MR.Context;
+  const SourceManager &SM = ASTC->getSourceManager();
+  if (SM.isInMainFile(SL) || (!SM.isInMainFile(SL) && !MainFileFlag)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool IsTheMatchInMainFile(bool MainFileFlag, const SourceManager &SM, SourceLocation SL) {
+  if (SM.isInMainFile(SL) || (!SM.isInMainFile(SL) && !MainFileFlag)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool IsTheMatchInMainFile(bool MainFileFlag, bool MainFile, SourceLocation SL) {
+  if (MainFile || (!MainFile && !MainFileFlag)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool IsTheMatchInMainFile(bool MainFileFlag, bool MainFile) {
+  if (MainFile || (!MainFile && !MainFileFlag)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+/*********************************************************************************************************************/
+/*End of namespace Devi*/
+}
+#pragma weak main
+int main(int argc, char** argv) {
+  std::cout << "cfe_extra, version 1.0.0\n";
+  return 0;
+}
+/*********************************************************************************************************************/
+/*last line intentionally left blank.*/
+