[antlr-interest] Unexpected character conversions

[David Zajic]

I'm experiencing unexpected character conversions for upper-ascii 
characters at the level of the lexer (or possibly the character 
stream).  For example, the character octal 222 is converted to three 
characters: octal 357 octal 277 octal 275.  Can you point me to the 
documentation about why this happens?  Is it possible to configure ANTLR 
so that upper ascii characters are passed through as is?
    Thanks,
    David