023 if auto both branches

✓ Passing This code compiles and runs correctly.

Code

// TEST: Auto-discharge in both branches of ~if
// STATUS: IMPLEMENTED
//
// When an obligation is created BEFORE an ~if with discard binding,
// auto-discharge should insert cleanup in BOTH branches.
//
// This demonstrates that the compiler correctly handles obligations
// that need cleanup in all code paths through a conditional.
//
// Expected: Compiles successfully, auto-inserts close in both branches

~import "$std/control"
~import "$app/fs"

const condition = true;

~app.fs:open(path: "test.txt")
| opened _ |>
    std.control:if(condition)
    | then |> _  // Auto-discharge inserts close here
    | else |> _  // Auto-discharge inserts close here too

pub fn main() void {}

input.kz

Imported Files

// Library module: fs
// Defines filesystem operations with cleanup obligations

const std = @import("std");

// File type with phantom states
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: {s}\n", .{path});
    const allocator = std.heap.page_allocator;
    const f = allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return .{ .opened = .{ .file = f } };
}

// Close a file - CONSUMES opened! state (disposes the resource)
~pub event close { file: *File[!opened] }
| closed {}

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

fs.kz

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