123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869
'use strict';
// --------------------------------------------------------------------// Imports// --------------------------------------------------------------------
const common = require('./common');const pexprs = require('./pexprs-main');
// --------------------------------------------------------------------// Operations// --------------------------------------------------------------------
/*  Called at grammar creation time to rewrite a rule body, replacing each reference to a formal  parameter with a `Param` node. Returns a PExpr -- either a new one, or the original one if  it was modified in place.*/pexprs.PExpr.prototype.introduceParams = common.abstract('introduceParams');
pexprs.any.introduceParams =  pexprs.end.introduceParams =  pexprs.Terminal.prototype.introduceParams =  pexprs.Range.prototype.introduceParams =  pexprs.Param.prototype.introduceParams =  pexprs.UnicodeChar.prototype.introduceParams =    function(formals) {      return this;    };
pexprs.Alt.prototype.introduceParams = function(formals) {  this.terms.forEach((term, idx, terms) => {    terms[idx] = term.introduceParams(formals);  });  return this;};
pexprs.Seq.prototype.introduceParams = function(formals) {  this.factors.forEach((factor, idx, factors) => {    factors[idx] = factor.introduceParams(formals);  });  return this;};
pexprs.Iter.prototype.introduceParams =  pexprs.Not.prototype.introduceParams =  pexprs.Lookahead.prototype.introduceParams =  pexprs.Lex.prototype.introduceParams =    function(formals) {      this.expr = this.expr.introduceParams(formals);      return this;    };
pexprs.Apply.prototype.introduceParams = function(formals) {  const index = formals.indexOf(this.ruleName);  if (index >= 0) {    if (this.args.length > 0) {      // TODO: Should this be supported? See issue #64.      throw new Error('Parameterized rules cannot be passed as arguments to another rule.');    }    return new pexprs.Param(index).withSource(this.source);  } else {    this.args.forEach((arg, idx, args) => {      args[idx] = arg.introduceParams(formals);    });    return this;  }};