217 arrow void mid chain continues

// The ACCEPTANCE boundary of the void mid-chain: after `|> void-sink()`, the
// thread is dropped (a void has no payload to carry) and the chain continues
// with explicit args — `|> value-sink(x: "z")`. The terminal value ("z") is
// discarded silently at top level. Pins: compiles, runs, prints "sink" and
// nothing else — the void mid-chain is a statement sequence, not a thread.
~import std/io

const std = @import("std");

~pub tor stage { }
| ok string
| err string
~proc stage|zig { return .{ .ok = "hi" }; }

~pub tor void-sink { }
~proc void-sink|zig { std.debug.print("sink\n", .{}); }

~pub tor value-sink { x: string } -> string
~proc value-sink|zig { return x; }

~stage()
| ok _ |> void-sink() |> value-sink(x: "z")
| err e |> std/io:print.ln("err: {{ e:s }}")