next: Types are values

JSON Superset

CUE is a superset of JSON. It adds the following conveniences:

  • C-style comments,
  • quotes may be omitted from field names without special characters,
  • commas at the end of fields are optional,
  • comma after last element in list is allowed,
  • outer curly braces are optional.

JSON objects are called structs in CUE. An object member is called a field.

json.cue

one: 1
two: 2

// A field using quotes.
"two-and-a-half": 2.5

list: [
	1,
	2,
	3,
]

$ cue export json.cue

{
    "list": [
        1,
        2,
        3
    ],
    "one": 1,
    "two": 2,
    "two-and-a-half": 2.5
}