apg-js-examples
Version:
Examples of using the suite of apg-js applications and libraries.
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JavaScript
// 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 = 8
// udts = 0
// opcodes = 36
// --- ABNF original opcodes
// ALT = 2
// CAT = 7
// REP = 3
// RNM = 13
// TLS = 4
// TBS = 1
// TRG = 2
// --- SABNF superset opcodes
// UDT = 0
// AND = 0
// NOT = 1
// BKA = 2
// BKN = 1
// BKR = 0
// ABG = 0
// AEN = 0
// characters = [9 - 126]
// ```
/* OBJECT IDENTIFIER (for internal parser use) */
this.grammarObject = 'grammarObject';
/* RULES */
this.rules = [];
this.rules[0] = { name: 'rule', lower: 'rule', index: 0, isBkr: false };
this.rules[1] = { name: 'left-to-right', lower: 'left-to-right', index: 1, isBkr: false };
this.rules[2] = { name: 'right-to-left', lower: 'right-to-left', index: 2, isBkr: false };
this.rules[3] = { name: 'ltr-comment', lower: 'ltr-comment', index: 3, isBkr: false };
this.rules[4] = { name: 'rtl-comment', lower: 'rtl-comment', index: 4, isBkr: false };
this.rules[5] = { name: 'begin', lower: 'begin', index: 5, isBkr: false };
this.rules[6] = { name: 'end', lower: 'end', index: 6, isBkr: false };
this.rules[7] = { name: 'any', lower: 'any', index: 7, isBkr: false };
/* UDTS */
this.udts = [];
/* OPCODES */
/* rule */
this.rules[0].opcodes = [];
this.rules[0].opcodes[0] = { type: 2, children: [1,3] };// CAT
this.rules[0].opcodes[1] = { type: 3, min: 14, max: 14 };// REP
this.rules[0].opcodes[2] = { type: 4, index: 7 };// RNM(any)
this.rules[0].opcodes[3] = { type: 1, children: [4,5] };// ALT
this.rules[0].opcodes[4] = { type: 4, index: 1 };// RNM(left-to-right)
this.rules[0].opcodes[5] = { type: 4, index: 2 };// RNM(right-to-left)
/* left-to-right */
this.rules[1].opcodes = [];
this.rules[1].opcodes[0] = { type: 2, children: [1,3] };// CAT
this.rules[1].opcodes[1] = { type: 15 };// BKA
this.rules[1].opcodes[2] = { type: 4, index: 3 };// RNM(ltr-comment)
this.rules[1].opcodes[3] = { type: 7, string: [36] };// TLS
/* right-to-left */
this.rules[2].opcodes = [];
this.rules[2].opcodes[0] = { type: 2, children: [1,3] };// CAT
this.rules[2].opcodes[1] = { type: 15 };// BKA
this.rules[2].opcodes[2] = { type: 4, index: 4 };// RNM(rtl-comment)
this.rules[2].opcodes[3] = { type: 7, string: [36] };// TLS
/* ltr-comment */
this.rules[3].opcodes = [];
this.rules[3].opcodes[0] = { type: 2, children: [1,2,7] };// CAT
this.rules[3].opcodes[1] = { type: 4, index: 5 };// RNM(begin)
this.rules[3].opcodes[2] = { type: 3, min: 0, max: Infinity };// REP
this.rules[3].opcodes[3] = { type: 2, children: [4,6] };// CAT
this.rules[3].opcodes[4] = { type: 13 };// NOT
this.rules[3].opcodes[5] = { type: 4, index: 6 };// RNM(end)
this.rules[3].opcodes[6] = { type: 4, index: 7 };// RNM(any)
this.rules[3].opcodes[7] = { type: 4, index: 6 };// RNM(end)
/* rtl-comment */
this.rules[4].opcodes = [];
this.rules[4].opcodes[0] = { type: 2, children: [1,2,7] };// CAT
this.rules[4].opcodes[1] = { type: 4, index: 5 };// RNM(begin)
this.rules[4].opcodes[2] = { type: 3, min: 0, max: Infinity };// REP
this.rules[4].opcodes[3] = { type: 2, children: [4,5] };// CAT
this.rules[4].opcodes[4] = { type: 4, index: 7 };// RNM(any)
this.rules[4].opcodes[5] = { type: 16 };// BKN
this.rules[4].opcodes[6] = { type: 4, index: 5 };// RNM(begin)
this.rules[4].opcodes[7] = { type: 4, index: 6 };// RNM(end)
/* begin */
this.rules[5].opcodes = [];
this.rules[5].opcodes[0] = { type: 7, string: [47,42] };// TLS
/* end */
this.rules[6].opcodes = [];
this.rules[6].opcodes[0] = { type: 7, string: [42,47] };// TLS
/* any */
this.rules[7].opcodes = [];
this.rules[7].opcodes[0] = { type: 1, children: [1,2,3] };// ALT
this.rules[7].opcodes[1] = { type: 5, min: 32, max: 126 };// TRG
this.rules[7].opcodes[2] = { type: 5, min: 9, max: 10 };// TRG
this.rules[7].opcodes[3] = { type: 6, string: [13] };// TBS
// The `toString()` function will display the original grammar file(s) that produced these opcodes.
this.toString = function toString(){
let str = "";
str += "rule = 14any (left-to-right / right-to-left)\n";
str += "left-to-right = &<r-comment \"$\"\n";
str += "right-to-left = &&rtl-comment \"$\"\n";
str += "ltr-comment = begin *(!end any) end\n";
str += "rtl-comment = begin *(any !!begin) end\n";
str += "begin = \"/*\"\n";
str += "end = \"*/\"\n";
str += "any = %d32-126 / %d9-10 / %d13\n";
return str;
}
}