C++ and a stored procudre

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hello

once again :)
the code is this:
text *src;
void *tmp;
src = (text*)tmp;

and the error message:
error: parse error before `)' token
(at (text*_)_)

originally i've tried to use the macro PG_GETARG_TEXT_P(0), but when i've
got this message, i've asked the preprocessor for the preprocess code, to
get this makro resolved. after i've resolved the macro:
((text *)pg_detoast_datum((struct varlena *)((Pointer)(fcinfo->arg[0]))))
i've got this.
what's the problem with the (text*) casting?

Bye,

Gergely Czuczy
mailto: phoemix(at)harmless(dot)hu
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