Defining multiple functions at the same time

[sgraham]

Hi,

I'm trying to emit code from my front end in a single pass, but also would like to support nested functions. I saw the documentation that says only one function can be created at a time, and also that curr_func is asserted in mir.c.

From my naive scan of where curr_func is used though, it looks like there's not much preventing multiple active functions, other than the signature of MIR_finish_func would need to take the function, rather than assuming a global single one.

Is that a reasonable change to try to make? Or are there other hidden dependencies on only having a single function at a time?

(To be clear, I don't need/want MIR to support access to outer scopes or anything like that, I just want to be able to add instructions, etc. to a second function before finishing the first one.)

Thanks, Scott