[cfe-commits] Avoid clang::SourceManger's cache

Vassil Vassilev vvasilev at cern.ch
Mon Apr 23 07:12:06 PDT 2012

   I am working on the following example:
[cling]$ #include <iostream>
[cling]$ #include <fstream>
[cling]$ std::ofstream myfile;
[cling]$ myfile.open("TmpClassDef.h");
[cling]$ myfile << "class MyClass{};\n"
[cling]$ myfile << "error_here;";
[cling]$ myfile.close();
[cling]$ #include "TmpClassDef.h" <--- issues error and recovers and 

[cling]$ myfile.open("TmpClassDef.h");
[cling]$ myfile << "class MyClass{ \n";
[cling]$ myfile << "public: \n";
[cling]$ myfile << "  int gimme12(){\n";
[cling]$ myfile << "    return 12;\n"
[cling]$ myfile << "  }\n"
[cling]$ myfile << "};\n";
[cling]$ myfile.close();
[cling]$ #include "TmpClassDef.h" <--- no errors

   However at the last line I hit the SourceManager's cache and it picks 
up the old
file (containing the errors).
   My general question is : Is there a way remove the file from the cache?

   I am trying to override the TmpClassDef.h file by using: 
The issue is that actually I am overriding the same file with itself. So 
if I try to get the
llvm::MemoryBuffer for the same FileID I'd get again the cached one.
   Any ideas are very welcome!

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