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Passing This code compiles and runs correctly.
Code
import std/control
import app/fs
app/fs:open(path: "outer.txt"): _ |> for(0..3)
! each _ |> _ // Loop body, obligation flows through
| done |> _ // Auto-discharge inserts close here (runs once)
Supporting Files
// JavaScript implementation facet of module `fs`.
// Events and types are declared in fs.kz (merged at import); this file holds
// the |js proc bodies. What the fixture pins is the obligation lifecycle, so
// the Zig facet's page_allocator.create/destroy is modelled by a plain object
// and a no-op release.
~proc open|js {
console.log(`Opening file: ${path}`);
return { handle: 42 };
}
~proc close|js {
console.log("Closing file");
}
// 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 tor open { path: string } -> *File<opened!>
~proc open|zig {
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 f;
}
// Close a file - CONSUMES opened! state (disposes the resource)
~pub tor close { file: *File<!opened> }
~proc close|zig {
std.debug.print("Closing file\n", .{});
}
Actual
Opening file: outer.txt
Closing file
Expected output
Opening file: outer.txt
Closing file
Flows
flow ~open click a branch to expand · @labels scroll to their anchor
open (path: "outer.txt")
Test Configuration
MUST_RUN