apg-js-examples
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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 = 27
// --- ABNF original opcodes
// ALT = 4
// CAT = 3
// REP = 4
// RNM = 8
// TLS = 0
// TBS = 4
// TRG = 4
// --- SABNF superset opcodes
// UDT = 0
// AND = 0
// NOT = 0
// BKA = 0
// BKN = 0
// BKR = 0
// ABG = 0
// AEN = 0
// characters = [32 - 126]
// ```
/* OBJECT IDENTIFIER (for internal parser use) */
this.grammarObject = 'grammarObject';
/* RULES */
this.rules = [];
this.rules[0] = { name: 'csv', lower: 'csv', index: 0, isBkr: false };
this.rules[1] = { name: 'field', lower: 'field', index: 1, isBkr: false };
this.rules[2] = { name: 'quoted', lower: 'quoted', index: 2, isBkr: false };
this.rules[3] = { name: 'quoted-text', lower: 'quoted-text', index: 3, isBkr: false };
this.rules[4] = { name: 'double-quote', lower: 'double-quote', index: 4, isBkr: false };
this.rules[5] = { name: 'any-but-quote', lower: 'any-but-quote', index: 5, isBkr: false };
this.rules[6] = { name: 'text', lower: 'text', index: 6, isBkr: false };
this.rules[7] = { name: 'any-but-comma', lower: 'any-but-comma', index: 7, isBkr: false };
/* UDTS */
this.udts = [];
/* OPCODES */
/* csv */
this.rules[0].opcodes = [];
this.rules[0].opcodes[0] = { type: 2, children: [1,2] };// CAT
this.rules[0].opcodes[1] = { type: 4, index: 1 };// RNM(field)
this.rules[0].opcodes[2] = { type: 3, min: 0, max: Infinity };// REP
this.rules[0].opcodes[3] = { type: 2, children: [4,5] };// CAT
this.rules[0].opcodes[4] = { type: 6, string: [44] };// TBS
this.rules[0].opcodes[5] = { type: 4, index: 1 };// RNM(field)
/* field */
this.rules[1].opcodes = [];
this.rules[1].opcodes[0] = { type: 1, children: [1,2] };// ALT
this.rules[1].opcodes[1] = { type: 4, index: 2 };// RNM(quoted)
this.rules[1].opcodes[2] = { type: 4, index: 6 };// RNM(text)
/* quoted */
this.rules[2].opcodes = [];
this.rules[2].opcodes[0] = { type: 2, children: [1,2,3] };// CAT
this.rules[2].opcodes[1] = { type: 6, string: [34] };// TBS
this.rules[2].opcodes[2] = { type: 4, index: 3 };// RNM(quoted-text)
this.rules[2].opcodes[3] = { type: 6, string: [34] };// TBS
/* quoted-text */
this.rules[3].opcodes = [];
this.rules[3].opcodes[0] = { type: 3, min: 0, max: Infinity };// REP
this.rules[3].opcodes[1] = { type: 1, children: [2,3] };// ALT
this.rules[3].opcodes[2] = { type: 4, index: 5 };// RNM(any-but-quote)
this.rules[3].opcodes[3] = { type: 4, index: 4 };// RNM(double-quote)
/* double-quote */
this.rules[4].opcodes = [];
this.rules[4].opcodes[0] = { type: 3, min: 2, max: 2 };// REP
this.rules[4].opcodes[1] = { type: 6, string: [34] };// TBS
/* any-but-quote */
this.rules[5].opcodes = [];
this.rules[5].opcodes[0] = { type: 1, children: [1,2] };// ALT
this.rules[5].opcodes[1] = { type: 5, min: 32, max: 33 };// TRG
this.rules[5].opcodes[2] = { type: 5, min: 35, max: 126 };// TRG
/* text */
this.rules[6].opcodes = [];
this.rules[6].opcodes[0] = { type: 3, min: 0, max: Infinity };// REP
this.rules[6].opcodes[1] = { type: 4, index: 7 };// RNM(any-but-comma)
/* any-but-comma */
this.rules[7].opcodes = [];
this.rules[7].opcodes[0] = { type: 1, children: [1,2] };// ALT
this.rules[7].opcodes[1] = { type: 5, min: 32, max: 43 };// TRG
this.rules[7].opcodes[2] = { type: 5, min: 45, max: 126 };// TRG
// The `toString()` function will display the original grammar file(s) that produced these opcodes.
this.toString = function toString(){
let str = "";
str += "csv = field *(%d44 field)\n";
str += "field = quoted / text\n";
str += "quoted = %d34 quoted-text %d34\n";
str += "quoted-text = *(any-but-quote / double-quote)\n";
str += "double-quote = 2%d34\n";
str += "any-but-quote = %d32-33 / %d35-126\n";
str += "text = *any-but-comma\n";
str += "any-but-comma = %d32-43 / %d45-126\n";
return str;
}
}