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go: types.sx — call type-checking + 8 tests; recursive funcs now type [nothing]

Phase 3 cont. The expression-synth :app dispatch is now bifurcated:

  * go-is-binop-call? — head is :var with an operator name AND 2 args
    AND the operator is in one of the binop tables. Short-circuits to
    go-synth-binop as before.
  * Everything else routes to go-synth-call.

go-synth-call:
  1. Synth the callee. Must produce a (list :ty-func PARAMS RESULTS).
     Otherwise → (:type-error :not-callable TYPE).
  2. Arity-check args vs params. Mismatch → (:type-error :arity-mismatch).
  3. go-check-args-against: each arg assignable to corresponding param
     (untyped-constant flow works — `f(42)` accepts the untyped int
     into an int param).
  4. Result by count:
       0 results → (list :ty-void)
       1 result  → that result directly
       N results → (list :ty-tuple TYPES)   for multi-return

The recursive case lights up: go-check-func-decl binds the function
in its own body's ctx before checking. So:

  func fib(n int) int { return fib(n) + fib(n) }

now type-checks because `fib` resolves inside the body, synth-call
sees its `:ty-func` and verifies the recursive call. Multi-return
functions destructure into `:ty-tuple` which short-decl will need to
consume next iteration.

types 55/55, total 360/360.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-27 20:56:10 +00:00

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Total: 360 / 360 tests passing

	Suite	Pass	Total
✅	lex	129	129
✅	parse	176	176
✅	types	55	55
⬜	eval	0	0
⬜	runtime	0	0
⬜	stdlib	0	0
⬜	e2e	0	0

Generated by lib/go/conformance.sh.

320 B Raw Blame History

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320 B

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