printEnum

fn printEnum(
    options: *Options,
    out: *std.ArrayList(u8),
    comptime T: type,
    comptime val: std.builtin.Type.Enum,
    indent: u8,
) !void {
    const gpa = options.step.owner.allocator;
    const gop = try options.encountered_types.getOrPut(gpa, @typeName(T));
    if (gop.found_existing) return;

    try out.appendNTimes(gpa, ' ', indent);
    try out.print(gpa, "pub const {f} = enum ({s}) {{\n", .{ std.zig.fmtId(@typeName(T)), @typeName(val.tag_type) });

    inline for (val.field_names, val.field_values) |field_name, field_value| {
        try out.appendNTimes(gpa, ' ', indent);
        try out.print(gpa, "    {f} = {d},\n", .{
            std.zig.fmtIdFlags(field_name, .{ .allow_primitive = true }), field_value,
        });
    }

    if (val.mode == .nonexhaustive) {
        try out.appendNTimes(gpa, ' ', indent);
        try out.appendSlice(gpa, "    _,\n");
    }

    try out.appendNTimes(gpa, ' ', indent);
    try out.appendSlice(gpa, "};\n");
}