const encoding/base64.invalidIndex

3 uses

	encoding/base64 (current package)
		base64.go#L54: 	invalidIndex = '\xff'
		base64.go#L81: 		case e.decodeMap[encoder[i]] != invalidIndex:
		base64.go#L100: 	case padding != NoPadding && enc.decodeMap[byte(padding)] != invalidIndex: