010 std for basic

// Test 320_010: Basic ~for loop
// Tests that ~for compiles to optimal Zig for-loop
//
// SEMANTICS:
// - | each item |> runs for EACH element (N times)
// - | done |> runs ONCE after iteration completes
//
// MUST emit actual Zig `for` loop, NOT while or labeled recursion

const std = @import("std");

~import std/control

// Accumulator
var sum: i32 = 0;

// Event to process each item
~event process { value: i32 }

~proc process|zig {
    sum += value;
    std.debug.print("{}\n", .{value});
}

// Event to finalize
~event finalize {}

~proc finalize|zig {
    std.debug.print("Sum: {}\n", .{sum});
}

// Test data
const items = [_]i32{ 1, 2, 3, 4, 5 };

// The for loop - should emit optimal Zig for
~for(&items)
! each item |> process(value: item)
| done |> finalize()