import { DimensionEncoding, ExpressionDSL } from './AST';
/**
 * First let's understand Encoding. It has a 'fields' object, and a 'context' object
 * Example:
 *  {
 *    context:{
 *        gradientContext:["red", "yellow", "green"]
 *
 *    },
 *
 *    fields:{
 *        field1:{
 *            value:"selectByPosition(FIRST)|expects(NUMERIC)"
 *        },
 *        field2:{
 *            value:"selectByPosition(SECOND)|expects(NUMERIC)",
 *            meta:{
 *                color:gradient(gradientContext)|toRGB(),
 *                smell: odor('delicious')
 *            }
 *        }
 *
 *    }
 *
 *  }
 *
 *  So we have to fields named 'field1' and 'field2'. Their value is computed at runtime by executing
 *  the DSL for value. A field can also have computed info. Computed fields are gotten by feeding the value,
 *  at runtime, into the DSL expression for the computed field. For example, 'color' is obtained by
 *  running the gradient function. The gradient function refers to gradientContext object. The gradient
 *  function is also explicitly passed the value.
 *
 */
export interface Encoding {
    dimensions: {
        [key: string]: DimensionEncoding | ExpressionDSL;
    };
    context: {
        [key: string]: Context;
    };
}
export type Context = any;