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/**
* @fileoverview Define the cursor which ignores specified tokens.
* @author Toru Nagashima
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const DecorativeCursor = require("./decorative-cursor");
//------------------------------------------------------------------------------
// Exports
//------------------------------------------------------------------------------
/**
* The decorative cursor which ignores specified tokens.
*/
module.exports = class FilterCursor extends DecorativeCursor {
/**
* Initializes this cursor.
* @param {Cursor} cursor - The cursor to be decorated.
* @param {Function} predicate - The predicate function to decide tokens this cursor iterates.
*/
constructor(cursor, predicate) {
super(cursor);
this.predicate = predicate;
}
/** @inheritdoc */
moveNext() {
const predicate = this.predicate;
while (super.moveNext()) {
if (predicate(this.current)) {
return true;
}
}
return false;
}
};
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