This Commented CUE demonstrates how to validate an integer value’s parity.
Two schemas #Odd and #Even are presented that validate an integer is either odd or even respectively.
file.cue
package example
#Even: num={2 * (div(num, 2))}
#Odd: num={1 + 2*(div(num, 2))}
valid: {
"-27": -27 & #Odd
"-22": -22 & #Even
"42": 42 & #Even
"47": 47 & #Odd
}
invalid: {
"-37": -37 & #Even
"-32": -32 & #Odd
"52": 52 & #Odd
"57": 57 & #Even
}TERMINAL
$ cue eval -ic
valid: {
"-27": -27
"-22": -22
"42": 42
"47": 47
}
invalid: {
"-37": _|_ // invalid."-37": conflicting values -38 and -37
"-32": _|_ // invalid."-32": conflicting values -31 and -32
"52": _|_ // invalid."52": conflicting values 53 and 52
"57": _|_ // invalid."57": conflicting values 56 and 57
}