Const.t4

<#+
static int MaxTypeParam { get; } = ReadIntEnvironment("T4_MAX_TYPE_PARAM") ?? 16;

static int? ReadIntEnvironment(string name) {
	var str = Environment.GetEnvironmentVariable(name);
	return string.IsNullOrWhiteSpace(str) ? null : int.TryParse(str, out var value) ? value : null;
}

static string Join<T>(IEnumerable<T> list) {
	return string.Join(", ", list);
}

static string Join<T>(IEnumerable<T> list, Func<T, string> selector) {
	return Join(list.Select(selector));
}

static string Join(int start, int count) {
	return string.Join(", ", Range(start, count));
}

static string Join(int start, int count, Func<int, string> selector) {
	return Join(Range(start, count, selector));
}

static IEnumerable<int> Range(int start, int count) {
	return Enumerable.Range(start, count);
}

static IEnumerable<T> Range<T>(int start, int count, Func<int, T> selector) {
	return Enumerable.Range(start, count).Select(selector);
}
#>