Adds Go's concurrency + iteration primitives to the statement parser:
go EXPR → (list :go EXPR)
defer EXPR → (list :defer EXPR)
ch <- v → (list :send CHAN VALUE)
for range COLL { ... } → (list :range-for nil nil nil COLL BODY)
for k := range C { ... } → (list :range-for :short-decl KEY nil COLL BODY)
for k, v := range C { } → (list :range-for :short-decl KEY VAL COLL BODY)
for k, v = range C { ... } → (list :range-for :assign KEY VAL COLL BODY)
gp-for-find-range pre-scans the for-header (to '{' or eof) looking
for the 'range' keyword; if present, dispatches to gp-parse-for-range
which handles the four range shapes. C-style and while-like and
infinite are now in gp-parse-for-c-style — gp-parse-for is just a
dispatcher.
Send statement detection lives in the LHS-list branch of gp-parse-stmt:
after parsing a single LHS expression, '<-' triggers (:send LHS RHS).
Channel-recv (`<-ch`) was already parsed as unary `<-` in the expression
layer, so both directions cover.
This is the **chiselling-relevant iteration** for the scheduler sister
kit: the AST shapes Go-on-SX will eventually feed into the kit's
scheduler primitives (sched-spawn, sched-defer, chan-op) have landed.
Sister-plan diary updated with three design insights:
* :go / :defer both wrap a single expr — kit's sched-spawn should
accept a thunk uniformly across Erlang's spawn(M,F,A) and Go's
go fn().
* :send carries CHAN+VALUE symmetrically with the unary <- recv —
both reduce to (chan-op direction chan value) in the kit.
* `for v := range ch` uses the same :range-for shape as range-over-
slice; the scheduler kit's range dispatch is where chan-recv ⇄
iteration polymorphism lives.
parse 161/161, total 290/290.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- go-on-sx.md: rewrite of 2026-04-26 draft to integrate lib/guest framework.
Adds Phase 3 (independent bidirectional type checker — first static-typed
guest), Phase 10 (extraction enabler), chisel discipline, conformance
scoreboard model. Phases 1-2 now consume lib/guest/core lex+pratt+ast.
- lib-guest-scheduler.md: NEW. Extraction plan for the fork/yield/block/
resume scheduler shared by Erlang (addressed processes + mailboxes) and
Go (anonymous channels + goroutines). Two-language rule blocks extraction
until both consumers independently work; rejected-extraction is a valid
outcome.
- lib-guest-static-types-bidirectional.md: NEW. Sister to lib/guest/hm.sx.
Bidirectional checker kit (synth/check judgments, pluggable subtype +
unify) for the languages HM doesn't fit — Go, Rust, TS, Swift, Kotlin,
Scala 3, Hack. First consumer: Go-on-SX. Second TBD; recommendation
TypeScript.
The three plans cross-reference each other. Go-on-SX implements scheduler +
checker independently of the kits; extraction is its own workstream once
two consumers exist.
