apg-js-examples/src/apg-exp/grammars/greek-words.js

Examples of using the suite of apg-js applications and libraries.

// copyright: Copyright (c) 2024 Lowell D. Thomas, all rights reserved<br>
//   license: BSD-2-Clause (https://opensource.org/licenses/BSD-2-Clause)<br>
//
// Generated by apg-js, Version 4.4.0 [apg-js](https://github.com/ldthomas/apg-js)
module.exports = function grammar(){
  // ```
  // SUMMARY
  //      rules = 4
  //       udts = 0
  //    opcodes = 16
  //        ---   ABNF original opcodes
  //        ALT = 3
  //        CAT = 0
  //        REP = 3
  //        RNM = 3
  //        TLS = 0
  //        TBS = 0
  //        TRG = 7
  //        ---   SABNF superset opcodes
  //        UDT = 0
  //        AND = 0
  //        NOT = 0
  //        BKA = 0
  //        BKN = 0
  //        BKR = 0
  //        ABG = 0
  //        AEN = 0
  // characters = [31 - 65535]
  // ```
  /* OBJECT IDENTIFIER (for internal parser use) */
  this.grammarObject = 'grammarObject';

  /* RULES */
  this.rules = [];
  this.rules[0] = { name: 'word', lower: 'word', index: 0, isBkr: false };
  this.rules[1] = { name: 'english-word', lower: 'english-word', index: 1, isBkr: false };
  this.rules[2] = { name: 'greek-word', lower: 'greek-word', index: 2, isBkr: false };
  this.rules[3] = { name: 'other-word', lower: 'other-word', index: 3, isBkr: false };

  /* UDTS */
  this.udts = [];

  /* OPCODES */
  /* word */
  this.rules[0].opcodes = [];
  this.rules[0].opcodes[0] = { type: 1, children: [1,2,3] };// ALT
  this.rules[0].opcodes[1] = { type: 4, index: 1 };// RNM(english-word)
  this.rules[0].opcodes[2] = { type: 4, index: 2 };// RNM(greek-word)
  this.rules[0].opcodes[3] = { type: 4, index: 3 };// RNM(other-word)

  /* english-word */
  this.rules[1].opcodes = [];
  this.rules[1].opcodes[0] = { type: 3, min: 1, max: Infinity };// REP
  this.rules[1].opcodes[1] = { type: 1, children: [2,3] };// ALT
  this.rules[1].opcodes[2] = { type: 5, min: 65, max: 90 };// TRG
  this.rules[1].opcodes[3] = { type: 5, min: 97, max: 122 };// TRG

  /* greek-word */
  this.rules[2].opcodes = [];
  this.rules[2].opcodes[0] = { type: 3, min: 1, max: Infinity };// REP
  this.rules[2].opcodes[1] = { type: 5, min: 880, max: 1023 };// TRG

  /* other-word */
  this.rules[3].opcodes = [];
  this.rules[3].opcodes[0] = { type: 3, min: 1, max: Infinity };// REP
  this.rules[3].opcodes[1] = { type: 1, children: [2,3,4,5] };// ALT
  this.rules[3].opcodes[2] = { type: 5, min: 31, max: 64 };// TRG
  this.rules[3].opcodes[3] = { type: 5, min: 91, max: 96 };// TRG
  this.rules[3].opcodes[4] = { type: 5, min: 123, max: 879 };// TRG
  this.rules[3].opcodes[5] = { type: 5, min: 1024, max: 65535 };// TRG

  // The `toString()` function will display the original grammar file(s) that produced these opcodes.
  this.toString = function toString(){
    let str = "";
    str += "word         = english-word / greek-word / other-word\n";
    str += "english-word = 1*(%d65-90/%d97-122)\n";
    str += "greek-word   = 1*(%x370-3ff)\n";
    str += "other-word   = 1*(%d31-64 / %d91-96 / %d123-879 / %x400-ffff)\n";
    return str;
  }
}