voll/lib/ast.js

Boolean expressions evaluator.

'use strict'

var ast = {
  Token: function Token (value) {
    this.value = value
  },

  Var: function Var (token) {
    this.token = token
    this.accept = function (visitor, args) {
      return visitor.visit_var(this, args)
    }
  },

  And: function And (token, left, right) {
    this.token = token
    this.left = left
    this.right = right
    this.accept = function (visitor, args) {
      return visitor.visit_and(this, args)
    }
  },

  Or: function Or (token, left, right) {
    this.token = token
    this.left = left
    this.right = right
    this.accept = function (visitor, args) {
      return visitor.visit_or(this, args)
    }
  },

  Not: function Not (token, operand) {
    this.token = token
    this.operand = operand
    this.accept = function (visitor, args) {
      return visitor.visit_not(this, args)
    }
  }
}

module.exports = ast