kapitancho/walex

此包的最新版本（0.0.1）没有可用的许可证信息。

维护者

详细信息

github.com/kapitancho/walex

源代码

问题

安装: 11

依赖项: 1

建议者: 0

安全性: 0

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关注者: 1

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0.0.1 2024-02-29 00:03 UTC

Requires

  • php: >=8.2

Unknown License 30c6e8779e2b7cb178ba612ac6bd3728c157c2d2

  • Marian Kostadinov <manchokapitancho.woop@gmail.com>

This package is not auto-updated.

Last update: 2024-09-27 00:55:52 UTC

README

一个轻量级的词法分析器，用PHP编写

安装

要安装最新版本，请使用以下命令

$ composer require kapitancho/walex

用法

Walex是Walnut语言的词法分析器。以下是基于实际代码的示例

<?php

use Walnut\Lib\Walex\Lexer;
use Walnut\Lib\Walex\Pattern;
use Walnut\Lib\Walex\Rule;
use Walnut\Lib\Walex\SpecialRuleTag;

$lexer = new Lexer([
    new Rule(new Pattern('(0|(\-?[1-9][0-9]*))\.[0-9]+'), 'real_number'),
    new Rule(new Pattern('[\+\-\*\/]'), 'arithmetic_op'),
    new Rule(new Pattern('[\n]'), SpecialRuleTag::newLine),
    new Rule(new Pattern('.'), SpecialRuleTag::skip)
]);

foreach($lexer->getTokensFor("3.141 + 42 * \n -5.6 / 7.8") as $token) {
    echo $token, PHP_EOL;
}
# Output:
# Token at line: 1, column: 1, offset: 0 of type real_number matching 3.141
# Token at line: 1, column: 7, offset: 6 of type arithmetic_op matching +
# Token at line: 1, column: 12, offset: 11 of type arithmetic_op matching *
# Token at line: 2, column: 2, offset: 15 of type real_number matching -5.6
# Token at line: 2, column: 7, offset: 20 of type arithmetic_op matching /
# Token at line: 2, column: 9, offset: 22 of type real_number matching 7.8
# Token at line: 2, column: 12, offset: 25 of type eof matching
?>