[Snek] How to return a string from builtin?

[Mikhail Gusarov]

Hello,

How do I return a string from a builtin?

I've got it working in the following way, but it seems suboptimal:

size_t len = strlen(s);
char *new = snek_alloc(len + 1);
if (new)
    memcpy(new, s, len);
return snek_string_to_poly(new);

— `s` here is always one of 8 constants, so I can allocate 8 strings
at the start and return one of them, but maybe there is a way to
completely avoid allocations?

Best,
Misha.