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45 lines
1.0 KiB
45 lines
1.0 KiB
<?php
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/** @license MIT
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* Copyright 2021 Dustin Wilson et al.
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* See LICENSE and AUTHORS files for details */
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declare(strict_types=1);
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namespace dW\Highlighter\Scope;
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class Data {
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protected array $data;
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protected int $position = 0;
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protected int $endPosition;
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public function __construct(string $data) {
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preg_match('/[LRB]:|[A-Za-z0-9-+_\*\.]+|[\,\|\-\(\)&]/', $data, $matches);
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$this->data = $matches[1] ?? [];
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$this->endPosition = count($this->data);
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}
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public function consume(): string|bool {
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if ($this->position === $this->endPosition) {
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return false;
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}
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return $this->data[$this->position++];
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}
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public function peek(): string|bool {
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if ($this->position === $this->endPosition) {
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return false;
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}
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return $this->data[$this->position + 1];
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}
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public function unconsume(): bool {
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if ($this->position < 0) {
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return false;
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}
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$this->position--;
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return true;
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}
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}
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