TakMinutes

$ cat numeric.cue dec: 123 dec_long: 123_456_789 m: 1K mi: 1Ki bin: 0b10000 bin_long: 0b100000000_00000000 oct: 0o700 oct_long: 0o700_000_000 hex: 0xff hex_long: 0xdead_beef f: 0.1 fn: .2 e: 1e-1 e2: 1.2e-1 $ cue eval numeric.cue dec: 123 dec_long: 123456789 m: 1000 mi: 1024 bin: 16 bin_long: 65536 oct: 448 oct_long: 117440512 hex: 255 hex_long: 3735928559 f: 0.1 fn: 0.2 e: 0.1 e2: 0.12

日本語版

When I though what format shall I use as a program configuration file, I got to know CUE lang.

I could use comments, conditional branch and loop processing, It seems good. And look like also can call event Go lang library!? It may be too many functions for just use as a configuration file…

For now, I touched it.

Install.

$ go install cuelang.org/go/cmd/cue@latest
$ cue version
cue version v0.4.3 linux/arm64

Used such as the following file,

$ cat persons.cue
#Person: {
        name: string
        level: int & >=1 & <=10
        role: "Administrator" | *"Developer"  // Developer is the default
}

alicee: #Person
alicee: {name: "Alice", level: 6 }

bobsmith: #Person
bobsmith: {name: "Bob", level: 5 }

carryz: #Person
bobsmith: {name: "Carry", level: 5 }

Administrators: [ "alicee" ]

for person in Administrators {
        "\(person)": {
                role: "Administrator"
        }
}

the evaluation result was:

$ cue eval persons.cue
#Person: {
    name:  string
    level: uint & >=1 & <=10
    role:  "Developer"
}
alicee: {
    name:  "Alice"
    level: 6
    role:  "Administrator"
}
bobsmith: {
    name:  "Bob"
    level: 5
    role:  "Developer"
}
carryz: {
    name:  "Carry"
    level: 5
    role:  "Developer"
}
Administrators: ["alicee"]

CUE Specification – Numeric Literals

First touch CUE lang