002 discard binding ok

✓ Passing This code compiles and runs correctly.

Code

// TEST: Discard binding with _ is valid
//
// When a user writes `| opened _ |>`, this is an explicit discard.
// Unlike named bindings, _ is NOT checked for usage (KORU100 exempt).
//
// The auto-discharge system will synthesize a binding (_auto_0) internally
// so disposal calls can still reference the value.
//
// Expected: Compiles successfully

~import "$app/fs"

// OK: _ is explicit discard - no KORU100 error
~app.fs:open(path: "test.txt")
| opened _ |> _

pub fn main() void {}

input.kz

Imported Files

// Library module: fs
// Single disposal event - auto-discharge should work

const std = @import("std");

const File = struct { handle: i32 };

// Open a file - returns opened! state (requires cleanup)
~pub event open { path: []const u8 }
| opened { file: *File[opened!] }

~proc open {
    std.debug.print("Opening file\n", .{});
    const f = std.heap.page_allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return .{ .opened = .{ .file = f } };
}

// Close - the ONLY consumer of [!opened]
~pub event close { file: *File[!opened] }
| closed {}

~proc close {
    std.debug.print("Closing file (auto-discharged)\n", .{});
    return .{ .closed = .{} };
}

fs.kz

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