giles
b661318a45
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Parser: when a parenthesised subexpression contains only function
segments (>= 2), collect-segments-loop now emits a :train AST node
instead of treating it as a value-producing expression.
Resolver: apl-resolve-{monadic,dyadic} handle :train.
- monadic 2-train (atop): (g h)⍵ = g (h ⍵)
- monadic 3-train (fork): (f g h)⍵ = (f ⍵) g (h ⍵)
- dyadic 2-train: ⍺(g h)⍵ = g (⍺ h ⍵)
- dyadic 3-train: ⍺(f g h)⍵ = (⍺ f ⍵) g (⍺ h ⍵)
apl-run "(+/÷≢) 1 2 3 4 5" → 3 (mean)
apl-run "(- ⌊) 5" → -5 (atop)
apl-run "2 (+ × -) 5" → -21 (dyadic fork)
apl-run "(⌈/-⌊/) 3 1 4 …" → 8 (range)
21 KiB
21 KiB