Quoting Hans-Christoph Steiner <[EMAIL PROTECTED]>:
>
> Is there anyway to check whether a symbol already exists?
i don't know of any.
2 suggestions:
a) a symbol is a pointer
if you get a symbol as "t_symbol*s" and s!=NULL, then you can safely
assume that the symbol already exists (except someone evil sent you
garbage)
so you can implement:
int symbol_exists(t_symbol*s) { return (0!=s); }
b) you can always make sure, that a certain string is always
represented as a symbol; which guarantees that your symbol exists.
int symbol_exists(char*string) { gensym(string); return 1; }
in practice, i think both implementations are rather a joke.
what do you need this for?
finally, you can bind a "class" to a symbol and lookup the class by it's name.
fma.dsr
IOhannes
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