Cue - Data notation

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

#315on PLDB

6Years Old

Download source code:

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

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

Tags: dataNotation
Cue is developed on GitHub and has 3,090 stars
Early development of Cue happened in https://github.com/cue-lang
Cue is written in Go, YAML, Protocol Buffers, JSON, Markdown, Dockerfile
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"

Language features

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