Command_Parameters

 mangled-symbol-name

 CXXDEMANGLE accepts symbol names in their mangled form, as they might
 appear in the output from a CXXLINK/NOEXPAND command.

 If you specify a mangled symbol name using the command line interface
 and the symbol contains lowercase letters, you must place the symbol
 within quotes.  For example, $ CXXDEMANGLE "MyFunction__xic".  Quotes are
 not necessary when entering mangled symbol names using the interactive
 interface.