parsey/structs.js

A parser for context-free grammars

'use strict';

class Verb {

  constructor(name, inputs, output) {
    this.name = name;
  }

  apply(env, inputs) {
    if (inputs.length !== this.inputs.length) {
      return false;
    }
    env.statements.push({
      name  : this.name,
      inputs: inputs
    });
  }

  check(env, inputs) {
    let matchingStatements = env.statements.filter((stmt) => {
      if (
        stmt.name === this.name &&
        stmt.inputs.reduce((doesMatch, value, i) => {
          return doesMatch && value.compare(this.inputs[i]);
        }, true)
      ) {
        return true;
      }
      return false;
    });

    if (matchingStatements.length > 0) {
      return true;
    }
    return false;
  }

}


let v = new Verb('hello');