[antlr-interest] Re: MSVC 7.0

[lgcraymer]

--- In antlr-interest at yahoogroups.com, "Arnar Birgisson" <arnarb at o...> 
wrote:
...
> Then, somewhere along the way, the expected character becomes an 
int,
> and should be 0x000000f0, but is generated as 0xfffffff0. When 0xf0 
is
> seen on the input, this causes a MismatchedCharException and it 
tries to
> generate it's message, it calls charName for 0xfffffff0 (the 
expected
> char), which in turn calls isprint and since 0xfffffff0 is negative, 
it
> blows up.

This looks more like a signed versus unsigned character problem.  As a 
signed "char", 0xf0 is -120 when converted to int, but as an unsigned 
char value is 248.  MSVC should have a compiler flag which interprets 
char as "unsigned char"; if not, Ric may be able to fix this pretty 
quickly if you ask.

--Loring


 

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