012 auto discharge none

✓ Passing This code compiles and runs correctly.

Code

// TEST: Auto-discharge with no consumer - MUST FAIL
// STATUS: PENDING IMPLEMENTATION
// MUST_FAIL: No disposal event found
//
// When no event consumes the obligation [!state], the compiler
// cannot auto-discharge and should error clearly.
//
// Here: open() returns *File[opened!] but NO event has [!opened]
// Compiler should error: "No disposal event found for [opened!]"
//
// This indicates a library bug - the library author forgot to
// provide a disposal event for the resource.

~import "$app/fs"

// This should FAIL - no way to dispose!
~app.fs:open(path: "test.txt")
| opened _ |> _

pub fn main() void {}

input.kz

Error Verification

Expected Error Pattern

MUST_FAIL

Actual Compiler Output

[PHASE 2.4] Calling run_pass for transforms\n[PHASE 2.5] Executing comptime_main() - running comptime flows
[PHASE 2.5] Comptime flows complete (31 items)
[PHASE 2.6] Rescanning transformed AST (31 items)
[PHASE 2.6] Rescan complete: 25 comptime events found
  [0] std.compiler:requires
  [1] std.compiler:flag.declare
  [2] std.compiler:command.declare
  [3] std.compiler:coordinate
  [4] std.compiler:context_create
  [5] std.testing:test
  [6] std.testing:validate_mocks
  [7] std.testing:test.with_harness
  [8] std.testing:test.harness
  [9] std.testing:assert
  [10] std.testing:test.property.equivalent
  [11] std.deps:deps
  [12] std.deps:requires.system
  [13] std.deps:requires.zig
  [14] std.control:if
  [15] std.control:for
  [16] std.control:capture
  [17] std.control:const
  [18] std.build:requires
  [19] std.build:variants
  [20] std.build:config
  [21] std.build:command.sh
  [22] std.build:command.zig
  [23] std.build:step
  [24] std.template:define
error[KORU030]: No disposal event found for resource '_auto_0.file' with state 'app.fs:opened!'. Library must define an event with [!app.fs:opened!] parameter.
  --> auto_discharge:18:0

❌ Compiler coordination error: Auto-discharge failed (multiple disposal options or no disposal event)
error: CompilerCoordinationFailed
/Users/larsde/src/koru/tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_012_auto_discharge_none/backend.zig:9349:17: 0x101096433 in emit (backend)
                return error.CompilerCoordinationFailed;
                ^
/Users/larsde/src/koru/tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_012_auto_discharge_none/backend.zig:9433:28: 0x1010971bf in main (backend)
    const generated_code = try RuntimeEmitter.emit(compile_allocator, final_ast);
                           ^

Imported Files

// Library module: fs
// NO disposal event defined - should error

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 {
    const f = std.heap.page_allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return .{ .opened = .{ .file = f } };
}

// Oops! No close() or any event with [!opened] defined!
// This is a library bug - no way to satisfy the obligation

fs.kz

Test Configuration

MUST_FAIL

Expected Error:

No disposal event found

← 012 auto discharge explicit with multiple 013 auto discharge explicit ok →