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'use strict';
// --------------------------------------------------------------------// Imports// --------------------------------------------------------------------
const common = require('./common');const pexprs = require('./pexprs-main');
// --------------------------------------------------------------------// Operations// --------------------------------------------------------------------
/*  e1.toString() === e2.toString() ==> e1 and e2 are semantically equivalent.  Note that this is not an iff (<==>): e.g.,  (~"b" "a").toString() !== ("a").toString(), even though  ~"b" "a" and "a" are interchangeable in any grammar,  both in terms of the languages they accept and their arities.*/pexprs.PExpr.prototype.toString = common.abstract('toString');
pexprs.any.toString = function() {  return 'any';};
pexprs.end.toString = function() {  return 'end';};
pexprs.Terminal.prototype.toString = function() {  return JSON.stringify(this.obj);};
pexprs.Range.prototype.toString = function() {  return JSON.stringify(this.from) + '..' + JSON.stringify(this.to);};
pexprs.Param.prototype.toString = function() {  return '$' + this.index;};
pexprs.Lex.prototype.toString = function() {  return '#(' + this.expr.toString() + ')';};
pexprs.Alt.prototype.toString = function() {  return this.terms.length === 1 ?    this.terms[0].toString() :    '(' + this.terms.map(term => term.toString()).join(' | ') + ')';};
pexprs.Seq.prototype.toString = function() {  return this.factors.length === 1 ?    this.factors[0].toString() :    '(' + this.factors.map(factor => factor.toString()).join(' ') + ')';};
pexprs.Iter.prototype.toString = function() {  return this.expr + this.operator;};
pexprs.Not.prototype.toString = function() {  return '~' + this.expr;};
pexprs.Lookahead.prototype.toString = function() {  return '&' + this.expr;};
pexprs.Apply.prototype.toString = function() {  if (this.args.length > 0) {    const ps = this.args.map(arg => arg.toString());    return this.ruleName + '<' + ps.join(',') + '>';  } else {    return this.ruleName;  }};
pexprs.UnicodeChar.prototype.toString = function() {  return '\\p{' + this.category + '}';};