Re: parse hex numerals [PATCH]

[Mike Pall <mikelu-0602@...>]

Hi,

Roberto Ierusalimschy wrote:
> What about this?
> 
> +  if (*endptr == 'x') *result = strtoul(s, &endptr, 16);

Cute. :-) Improvement:

  if (*endptr == 'x' || *endptr == 'X')
    *result = cast_num(strtoul(s, &endptr, 16));

Tested with original MSVCRT DLLs and works fine. Alas, tonumber()
converts negative hex numbers to large positive doubles. :-/
But the approach in the lexer works. So -0xff == -255, but
tonumber"-0xff" == 4294967041 with lua_Number = double.
Everything's ok for lua_Number = int due to wrap-around.

Let's just pretend signed hex numbers are not too relevant for
tonumber().

Bye,
     Mike