[sldev] Verified the lexxing bug in indra.l

[Jesse Malthus]

By all means, please file a bug in JIRA (http:\\jira.secondlife.com\)

On 1/23/07, Argent Stonecutter <secret.argent at gmail.com> wrote:
> This script parses successfuly in LSL and produces an obviously
> incorrect result.
>
> default
> {
>      state_entry()
>      {
>          llSay(0, (string)(3.-4));
>      }
> }
>
> [14:09]  Object: 3.000000
>
> This is what I suggested would happen in my previous article with the
> constant folding patched for indra.l and indra.y.
>
> What's happening is that floating point numbers match an expression
> that begins with {D}+"."{D}*, and {D} expands to [-]?[0-9], which -4
> matches...
>
> This could be fixed in indra.l, but really folding '-' FP_CONSTANT
> into FP_CONSTANT should be done in indra.y, because it keeps "a-1"
> from matching this rule:
>
> expression : expression '-' expression ;
>
> Since "a-1" lexes to IDENTIFIER INTEGER_CONSTANT, not IDENTIFIER '-'
> INTEGER_CONSTANT.
>
> See my previous post for the patch.
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-- 
--Jesse