Note that this doesn't yet provide any useful abstractions for creating
discrete environments---it merely provides support for them moving
forward. Hopefully.
This is the next big step toward rewriting the compiler as a series of macro
passes. I'll write more on this later; it has profound consequences (well,
as a jump from Rebirth into Ulambda, which is a name that I haven't
mentioned until now).
It was yesterday that I also got word that I'll be speaking at
LibrePlanet 2018 in March. This is great news, but unfortunate news for
this project---it has had very little of time time to begin with, and now
it's going to have even less until after the conference.
* build-aux/bootstrap/rebirth.scm: Add toplevel note about Ulambda.
Add notes to "Step 2" regarding environments.
(es:envf, %es:env): Add macros.
(lambda, let*, let, set!): Macro forms use environments.
(%es:has-own-prop, %es:proto-of, %es:envobj-for, %es:setenv): New
procedures for `set!' macro.
(es:null?): Add procedure.
(_macros): Remove ES global (now using `_env.macros').
(cdfn-macro, macro?): Use `_env.macros' in place of `macros'.
(tparam->es, tname-verbatim?, env-ref, env-params): Add procedures.
(tname->id): Use `tname-verbatim?', which extracts the digit check.
(cdfn-var, cdfn-proc): Also assign to current environment.
(apply-proc-or-macro): Use `_env.macros'. Apply function from
environment.
(sexp->es)[symbol]: Generate environment reference.
(rebirth->ecmascript): Generate toplevel environment.
Mike Gerwitz
62ab1ee732
