system transformer for non-toplevel expressions

[Marius Vollmer]

Hi,

what is the significance of the system transformer for non-toplevel
expressions?

Currently, the system transformer is invoked in scm_i_eval and
scm_i_eval_x, which take a lexical environment to evaluate their code
in.  However, this environment is not passed to the system transformer
(and it shouldn't be).

I want to move to invocation of the system transformer to
scm_primitive_eval, which can only be used for top-level evaluation.
Is there anything that speaks against this?