reserved keyword branch

// Test 825: Reserved Zig Keyword as Branch Name
//
// BUG: When a branch uses a Zig reserved keyword (like "error"),
// the emitter generates invalid Zig code.
//
// Expected: Emitter escapes reserved keyword as .@"error" - compiles fine
// Actual: Emitter generates .error which is invalid Zig syntax
//
// This test demonstrates that the parser correctly accepts "error" as
// a branch name, but the emitter needs to escape it for Zig.

const std = @import("std");

~import std/io

~pub event process-file { path: []const u8 }
| success []const u8
| error []const u8  // "error" is a Zig reserved keyword!

~proc process-file|zig {
    const file = std.fs.cwd().openFile(path, .{}) catch |err| {
        return .{ .@"error" = @errorName(err) };
    };
    defer file.close();

    const data = file.readToEndAlloc(std.heap.page_allocator, 1024) catch |err| {
        return .{ .@"error" = @errorName(err) };
    };

    return .{ .success = data };
}

// Test without inline flows - just test keyword escaping
~process-file(path: "/nonexistent/file.txt")
| success _ |> std/io:print.ln("Unexpected file found")
| error _ |> std/io:print.ln("✅ Reserved Zig keyword branch works!")