1. I'm not sure why there would be any dependency on a C compiler in
either mine or Celelibi's proposal. Could you please elaborate? At
least in my proposal, we only ever go from Cython AST to Cython AST
and use Python to do it. None of these things require a C compiler.
To me it looked like Celelibi's proposal was basically asking for "some
subset" of regular Cython code to be evaluated at Cythonization time.
Since evaluation of Cython code requires compiling the C code first, it
seems to me it'd need a C compiler. It depends on the subset of course.
I agree that your suggestion of modifying the AST can/should be done in
Python.
2. Again I can't speak for Celelibi but my proposal would be
compile-time only. I'm happy to add restrictions (decorators on cdef
functions only or maybe even special syntax) to ensure that this is
the case.
The D-language which Celelibi linked as an example claims "All functions
that execute in CTFE must also be executable at run time. The compile
time evaluation of a function does the equivalent of running the
function at run time" and Celelibi didn't seem to be proposing any
special syntax. So on that basis I don't see where any compile-time only
restrictions can come from.
It's quite possible that I've missed the point of the proposal in both
cases though.
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