Standard Kernel control flow. $cond walks clauses in order with `else`
catch-all; clauses past the first match are NOT evaluated. $when/$unless
are simple guards. 12 tests, 242 total.
kernel-quasiquote-operative walks the template via mutually-recursive
knl-quasi-walk ↔ knl-quasi-walk-list. $unquote forms eval in dyn-env;
$unquote-splicing splices list-valued results. No depth tracking
(nested quasiquotes flatten). 8 new tests, 230 total. Sketched the
universal reflective quoting kit API for the eventual Phase 7 extraction.
:body slot holds a LIST of forms now (was single expression). New
knl-eval-body in eval.sx evaluates each form in sequence, returning
the last. $vau and $lambda accept (formals env-param body...) /
(formals body...). No $sequence dependency. 223 tests total.
Parser now reads 'expr, \`expr, ,expr, ,@expr as the four standard
shorthands. Quote uses existing $quote operative; quasiquote /
unquote / unquote-splicing recognised but not yet expanded at runtime
(left for first consumer to drive). 218 tests total across six suites.
Hygiene-by-default was already present: user operatives close over
static-env and bind formals + body $define!s in (extend STATIC-ENV),
caller's env untouched. $let evaluates values in caller env, binds
in fresh child env, runs body there. $define-in! explicitly targets
an env. Full scope-set / frame-stamp hygiene is research-grade
and documented as deferred future work in the reflective API notes.
kernel-eval/kernel-combine dispatch on tagged values: operatives see
un-evaluated args + dynamic env; applicatives evaluate args then recurse.
No hardcoded special forms — $if/$quote tested as ordinary operatives
built on the fly. Pure-SX env representation
{:knl-tag :env :bindings DICT :parent P}, surfaced as a candidate
lib/guest/reflective/env.sx API since SX make-env is HTTP-mode only.
