Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* Copyright © 2020 2021 2022 7thCode.(http://seventh-code.com/)
* This software is released under the MIT License.
* opensource.org/licenses/mit-license.php
*/
"use strict";
/**
* ParserStream
*/
export class ParserStream {
private start: number = 0;
private end: number = 0;
private value: string = "";
/**
* char
*
* @remarks current position char
*/
public get char(): string {
return this.value.charAt(this.end);
}
/**
* charCode
*
* @remarks current position charCode
*/
public get charCode(): number {
return this.value.charCodeAt(this.end);
}
/**
* current
*
* @remarks
* String between restore point and current position.
*/
public get current(): string {
return this.value.substring(this.start, this.end);
}
/**
* is_terminal
*
* @remarks end？
*/
public get is_terminal(): boolean {
return (this.value.length <= this.end);
}
/*
*
*
* */
constructor(value: string) {
this.value = value;
}
/**
* restore_point
*
* @remarks save point.
*/
public restore_point(): void {
this.start = this.end;
}
/**
* restore
*
* @remarks current position restore to restore_point.
*/
public restore(): void {
this.end = this.start;
}
/**
* next
*
* @remarks Advance the parsed end by one character
*/
public next(): void {
this.end++;
}
}
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