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'use strict';
// --------------------------------------------------------------------// Imports// --------------------------------------------------------------------
const common = require('./common');const errors = require('./errors');const pexprs = require('./pexprs-main');
// --------------------------------------------------------------------// Operations// --------------------------------------------------------------------
pexprs.PExpr.prototype.assertIteratedExprsAreNotNullable = common.abstract(    'assertIteratedExprsAreNotNullable');
pexprs.any.assertIteratedExprsAreNotNullable =  pexprs.end.assertIteratedExprsAreNotNullable =  pexprs.Terminal.prototype.assertIteratedExprsAreNotNullable =  pexprs.Range.prototype.assertIteratedExprsAreNotNullable =  pexprs.Param.prototype.assertIteratedExprsAreNotNullable =  pexprs.UnicodeChar.prototype.assertIteratedExprsAreNotNullable =    function(grammar) {      // no-op    };
pexprs.Alt.prototype.assertIteratedExprsAreNotNullable = function(grammar) {  for (let idx = 0; idx < this.terms.length; idx++) {    this.terms[idx].assertIteratedExprsAreNotNullable(grammar);  }};
pexprs.Seq.prototype.assertIteratedExprsAreNotNullable = function(grammar) {  for (let idx = 0; idx < this.factors.length; idx++) {    this.factors[idx].assertIteratedExprsAreNotNullable(grammar);  }};
pexprs.Iter.prototype.assertIteratedExprsAreNotNullable = function(grammar) {  // Note: this is the implementation of this method for `Star` and `Plus` expressions.  // It is overridden for `Opt` below.  this.expr.assertIteratedExprsAreNotNullable(grammar);  if (this.expr.isNullable(grammar)) {    throw errors.kleeneExprHasNullableOperand(this, []);  }};
pexprs.Opt.prototype.assertIteratedExprsAreNotNullable =  pexprs.Not.prototype.assertIteratedExprsAreNotNullable =  pexprs.Lookahead.prototype.assertIteratedExprsAreNotNullable =  pexprs.Lex.prototype.assertIteratedExprsAreNotNullable =    function(grammar) {      this.expr.assertIteratedExprsAreNotNullable(grammar);    };
pexprs.Apply.prototype.assertIteratedExprsAreNotNullable = function(grammar) {  this.args.forEach(arg => {    arg.assertIteratedExprsAreNotNullable(grammar);  });};