Custom

You can create your own custom operators by passing customOperators array to babel plugin config. Operator signature:

{
  match: string | (string => boolean),
  transform: (transform, operator, operands) => [],
  translate: (translate, operator, operands) => string,
}

Transform rule transforms the code from AST to AST
Translate rule translates the code from AST to JavaScript

Example#

{
  plugins: [
    [
      'una-language',
      {
        customOperators: [
         {
           match: '+++',
           transform: (transform, operator, operands) => [operator, transform(operands[1]), transform(operands[0])],
           translate: (translate, operator, operands) => `${translate(operands[0])} + ${translate(operands[1])}`
         }
        ]
      }
    ]
  ]
}

Every time you use this operator in your code like this:

console.log (+++ 1 2)

Before translating to JavaScript it first transforms to:

console.log (+++ 2 1)

And translates to JavaScript as:

console.log(2 + 1)