parseNumeric

 //Numeric.RPL_METADATASUBOK, Numeric.RPL_METADATAUNSUBOK, Numeric.RPL_METADATASUBS
	import std.array : array;
	import std.range : only, takeNone;
	import virc.common : User;

	with(parseNumeric!(Numeric.RPL_METADATASUBOK)(only("client", "url example")).get) {
		assert(subs.array == ["url", "example"]);
	}
	with(parseNumeric!(Numeric.RPL_METADATAUNSUBOK)(only("client", "url example")).get) {
		assert(subs.array == ["url", "example"]);
	}
	with(parseNumeric!(Numeric.RPL_METADATASUBS)(only("client", "url example")).get) {
		assert(subs.array == ["url", "example"]);
	}

	assert(parseNumeric!(Numeric.RPL_METADATASUBOK)(takeNone(only(""))).isNull);
	assert(parseNumeric!(Numeric.RPL_METADATAUNSUBOK)(takeNone(only(""))).isNull);
	assert(parseNumeric!(Numeric.RPL_METADATASUBS)(takeNone(only(""))).isNull);