apg-lite
Version:
lightweight JavaScript APG parser
130 lines (117 loc) • 5.16 kB
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)
const Grammar = function grammar(){
// ```
// SUMMARY
// rules = 9
// udts = 0
// opcodes = 35
// --- ABNF original opcodes
// ALT = 3
// CAT = 5
// REP = 8
// RNM = 10
// TLS = 6
// TBS = 0
// TRG = 3
// --- SABNF superset opcodes
// UDT = 0
// AND = 0
// NOT = 0
// BKA = 0
// BKN = 0
// BKR = 0
// ABG = 0
// AEN = 0
// characters = [43 - 101]
// ```
/* OBJECT IDENTIFIER (for internal parser use) */
this.grammarObject = 'grammarObject';
/* RULES */
this.rules = [];
this.rules[0] = { name: 'float', lower: 'float', index: 0, isBkr: false };
this.rules[1] = { name: 'sign', lower: 'sign', index: 1, isBkr: false };
this.rules[2] = { name: 'decimal', lower: 'decimal', index: 2, isBkr: false };
this.rules[3] = { name: 'integer', lower: 'integer', index: 3, isBkr: false };
this.rules[4] = { name: 'dot', lower: 'dot', index: 4, isBkr: false };
this.rules[5] = { name: 'fraction', lower: 'fraction', index: 5, isBkr: false };
this.rules[6] = { name: 'exponent', lower: 'exponent', index: 6, isBkr: false };
this.rules[7] = { name: 'esign', lower: 'esign', index: 7, isBkr: false };
this.rules[8] = { name: 'exp', lower: 'exp', index: 8, isBkr: false };
/* UDTS */
this.udts = [];
/* OPCODES */
/* float */
this.rules[0].opcodes = [];
this.rules[0].opcodes[0] = { type: 2, children: [1,3,4] };// CAT
this.rules[0].opcodes[1] = { type: 3, min: 0, max: 1 };// REP
this.rules[0].opcodes[2] = { type: 4, index: 1 };// RNM(sign)
this.rules[0].opcodes[3] = { type: 4, index: 2 };// RNM(decimal)
this.rules[0].opcodes[4] = { type: 3, min: 0, max: 1 };// REP
this.rules[0].opcodes[5] = { type: 4, index: 6 };// RNM(exponent)
/* sign */
this.rules[1].opcodes = [];
this.rules[1].opcodes[0] = { type: 1, children: [1,2] };// ALT
this.rules[1].opcodes[1] = { type: 7, string: [43] };// TLS
this.rules[1].opcodes[2] = { type: 7, string: [45] };// TLS
/* decimal */
this.rules[2].opcodes = [];
this.rules[2].opcodes[0] = { type: 1, children: [1,8] };// ALT
this.rules[2].opcodes[1] = { type: 2, children: [2,3] };// CAT
this.rules[2].opcodes[2] = { type: 4, index: 3 };// RNM(integer)
this.rules[2].opcodes[3] = { type: 3, min: 0, max: 1 };// REP
this.rules[2].opcodes[4] = { type: 2, children: [5,6] };// CAT
this.rules[2].opcodes[5] = { type: 4, index: 4 };// RNM(dot)
this.rules[2].opcodes[6] = { type: 3, min: 0, max: 1 };// REP
this.rules[2].opcodes[7] = { type: 4, index: 5 };// RNM(fraction)
this.rules[2].opcodes[8] = { type: 2, children: [9,10] };// CAT
this.rules[2].opcodes[9] = { type: 4, index: 4 };// RNM(dot)
this.rules[2].opcodes[10] = { type: 4, index: 5 };// RNM(fraction)
/* integer */
this.rules[3].opcodes = [];
this.rules[3].opcodes[0] = { type: 3, min: 1, max: Infinity };// REP
this.rules[3].opcodes[1] = { type: 5, min: 48, max: 57 };// TRG
/* dot */
this.rules[4].opcodes = [];
this.rules[4].opcodes[0] = { type: 7, string: [46] };// TLS
/* fraction */
this.rules[5].opcodes = [];
this.rules[5].opcodes[0] = { type: 3, min: 1, max: Infinity };// REP
this.rules[5].opcodes[1] = { type: 5, min: 48, max: 57 };// TRG
/* exponent */
this.rules[6].opcodes = [];
this.rules[6].opcodes[0] = { type: 2, children: [1,2,4] };// CAT
this.rules[6].opcodes[1] = { type: 7, string: [101] };// TLS
this.rules[6].opcodes[2] = { type: 3, min: 0, max: 1 };// REP
this.rules[6].opcodes[3] = { type: 4, index: 7 };// RNM(esign)
this.rules[6].opcodes[4] = { type: 4, index: 8 };// RNM(exp)
/* esign */
this.rules[7].opcodes = [];
this.rules[7].opcodes[0] = { type: 1, children: [1,2] };// ALT
this.rules[7].opcodes[1] = { type: 7, string: [43] };// TLS
this.rules[7].opcodes[2] = { type: 7, string: [45] };// TLS
/* exp */
this.rules[8].opcodes = [];
this.rules[8].opcodes[0] = { type: 3, min: 1, max: Infinity };// REP
this.rules[8].opcodes[1] = { type: 5, min: 48, max: 57 };// TRG
// The `toString()` function will display the original grammar file(s) that produced these opcodes.
this.toString = function toString(){
let str = "";
str += ";\n";
str += "; floating point number\n";
str += ";\n";
str += "float = [sign] decimal [exponent]\n";
str += "sign = \"+\" / \"-\"\n";
str += "decimal = integer [dot [fraction]]\n";
str += " / dot fraction\n";
str += "integer = 1*%d48-57\n";
str += "dot = \".\"\n";
str += "fraction = 1*%d48-57\n";
str += "exponent = \"e\" [esign] exp\n";
str += "esign = \"+\" / \"-\"\n";
str += "exp = 1*%d48-57\n";
return str;
}
}