Field values within a struct are accessed with selectors,
using dot notation (X.name), or index expressions (X["name"]).
Selectors can be used if a field name is a valid CUE identifier.
In other cases, including computed references and non-valid identifiers, index expressions can be used.
file.cue
one: #n.a & #n["a"] // Equivalent references
two: #n.b // Valid identifer
three: #n["c d"] // Non-valid identifier
four: #n[#E+"f"] // Computed reference
five: #n.#g // Valid identifier
#E: "e"
#n: {
a: 1
"b": 2
"c d": 3
ef: 4
#g: 5
}TERMINAL
$ cue export file.cue
{
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": 5
}