On Thu, Apr 12, 2001 at 06:02:16PM -0400, Dan Sugalski wrote:
> D'oh! I was thinking more along the lines of:
>
> START(FORTH) {
> $baz $foo $bar + =
> }
>
> where the entire parser was coopted. I wasn't considering the smaller (and
> probably more common) case where only a tiny piece was redefined.
Don't worry, it is under control. :) I'm trying to get the parser API
together, (yes, I am actually working on that) and it will have "overrides" on
several levels, where you can jump out to "external"[1] C functions to get
your parsing done. These "overrides" can be called at the absolute top level:
PerlOpTree* parse_from_string(STRING* string)
will call either
PerlOpTree* (*PL_parse_override)(STRING* string, void* data)
or yyparse(); alternatively, you can override things at the yyparse() and
yytoke() level. It's complex, but it does work, and it ensures us the
flexibility we need.
[1] That is, external to the parser
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