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'use strict';
// --------------------------------------------------------------------// Imports// --------------------------------------------------------------------
const common = require('./common');const pexprs = require('./pexprs-main');
// --------------------------------------------------------------------// Operations// --------------------------------------------------------------------
/*  Returns a PExpr that results from recursively replacing every formal parameter (i.e., instance  of `Param`) inside this PExpr with its actual value from `actuals` (an Array).
  The receiver must not be modified; a new PExpr must be returned if any replacement is necessary.*/// function(actuals) { ... }pexprs.PExpr.prototype.substituteParams = common.abstract('substituteParams');
pexprs.any.substituteParams =  pexprs.end.substituteParams =  pexprs.Terminal.prototype.substituteParams =  pexprs.Range.prototype.substituteParams =  pexprs.UnicodeChar.prototype.substituteParams =    function(actuals) {      return this;    };
pexprs.Param.prototype.substituteParams = function(actuals) {  return actuals[this.index];};
pexprs.Alt.prototype.substituteParams = function(actuals) {  return new pexprs.Alt(this.terms.map(term => term.substituteParams(actuals)));};
pexprs.Seq.prototype.substituteParams = function(actuals) {  return new pexprs.Seq(this.factors.map(factor => factor.substituteParams(actuals)));};
pexprs.Iter.prototype.substituteParams =  pexprs.Not.prototype.substituteParams =  pexprs.Lookahead.prototype.substituteParams =  pexprs.Lex.prototype.substituteParams =    function(actuals) {      return new this.constructor(this.expr.substituteParams(actuals));    };
pexprs.Apply.prototype.substituteParams = function(actuals) {  if (this.args.length === 0) {    // Avoid making a copy of this application, as an optimization    return this;  } else {    const args = this.args.map(arg => arg.substituteParams(actuals));    return new pexprs.Apply(this.ruleName, args);  }};