026 for subflow

// Test: ~for as subflow starting point
// This must work - transforms should apply to subflow bodies

~import std/io
~import std/control

const std = @import("std");

// Event that uses ~for in its implementation
~event count-to-three {}
| result i32

// Subflow implementation using ~for as the starting construct
~count-to-three = for(0..3)
! each _ |> std/io:print.ln("counting")
| done => result 3

// Main flow calls the subflow
~count-to-three()
| result _ |> std/io:print.ln("done")