053 braceless continuation constructors

// Test: Braceless branch constructors in flow continuations
//
// This tests the identity branch constructor syntax INSIDE flows:
//   | branch r |> done           (empty identity)
//   | branch r |> result r.value (identity with expression)
//
// This complements 100_052 which tests subflow syntax.

~import std/io

// Source event
~pub tor compute { x: i32 } -> i32

~proc compute|zig {
    return x * 2;
}

// Result event with identity branches
~pub tor result {} -> i32

// Wrapper that uses braceless constructors in continuations
~pub tor run-test {}

~proc run-test|zig {
    // This internally tests braceless continuation constructors
}

// Subflow using braceless identity in continuation
~tor process { input: i32 } -> i32

~process = compute(x: input): v -> v

// Main test
~std/io:print.ln("Testing braceless in continuation:")
~process(input: 21): r |> std/io:print.ln("  Got result: {{ r:d }}")