054 optional branch obligation

✓ Passing This code compiles and runs correctly.

Code

import app/resource
app/resource:risky()
| success _ |> _

input.k

Actual

Operation succeeded

Expected output

Operation succeeded

Flows

flow ~risky click a branch to expand · @labels scroll to their anchor

risky

Imported Files

// Library module: resource
// Demonstrates optional branch with obligation

const std = @import("std");

const Handle = struct {
    id: i32,
};

// Risky operation - might succeed OR might leak a handle
~pub event risky {}
| success u32
| ?leaked *Handle<owned!>  // Optional with obligation!

~proc risky|zig {
    // Always succeeds in this test, but the event DECLARES
    // that it COULD return ?leaked with an obligation
    std.debug.print("Operation succeeded\n", .{});
    return .{ .success = 42 };
}

// Disposer for the obligation (would need to be called for ?leaked)
~pub event close { handle: *Handle<!owned> }

~proc close|zig {
    std.debug.print("Closing handle\n", .{});
}

resource.kz

Test Configuration

MUST_RUN

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