Cue

home terminal code edit

Cue is a data notation created in 2018 by Marcel van Lohuizen.

Source code:

git clone https://github.com/cuelang/cue

#417on PLDB

5Years Old

Try now: Web

CUE has moved to https://github.com/cue-lang/cue

Cue website
Cue is developed on GitHub and has 3,148 stars
Cue first developed in https://github.com/cue-lang
Cue on Twitter
cuelang.org was registered in 2018

Example from the web:

#Spec: {
  kind: string

  name: {
    first:   !=""  // must be specified and non-empty
    middle?: !=""  // optional, but must be non-empty when specified
    last:    !=""
  }

  // The minimum must be strictly smaller than the maximum and vice versa.
  minimum?: int & <maximum
  maximum?: int & >minimum
}

// A spec is of type #Spec
spec: #Spec
spec: {
  knid: "Homo Sapiens" // error, misspelled field

  name: first: "Jane"

Feature	Supported	Token	Example
Comments	✓		// A comment
Line Comments	✓	//	// A comment
Semantic Indentation	X

Cue - Data notation

Language features