c++ - What exceptions does boost mapped_file_source throw? -

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Boost map_file_source, for example, throws an exception file not found. Is the exception square really throwing it? It does not seem to say in the documentation, unless I miss something.

Edit: Test case: 

  #include & lt; Boost / iostreams / device / mapped_file.hpp & gt; Int main (int argc, char ** argv) {boost :: iostreams :: mapped_file_source file; File.open (argv [1]); Return 0;  
 
 If mapping fails, code 
 
 < Code> mapped_handle_ = :: CreateFileMappingA (handle_, NULL, defense, 0, 0, zero); If (mapped_handle_ == NULL) cleanup_and_throw ("failed to create mapping");  
 
 Eventually 
 
  will boost: iostreams :: detail :: throw_system_failure (msg);  
 
 i.e. Sub-class of  std :: exception  In this case, it is  std :: ios :: failure : 
 
 
 BOOST_IOSTREAMS_FAILURE 
 < P> should be std :: ios_base :: Failure to expand, and otherwise the std :: exception for the appropriate derived class. 
 
 
 Reference:

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