Snobol4【1】 语言实战：HTML【3】 视频标签【4】解析实战
Snobol4 是一种古老的编程语言，以其简洁的语法和强大的字符串处理【5】能力而闻名。尽管在现代编程中不常见，但它在处理文本和字符串方面仍然有其独特的优势。本文将探讨如何使用 Snobol4 语言来解析 HTML 视频标签，实现一个简单的视频标签解析器【6】。
Snobol4 简介
Snobol4 是一种高级编程语言，由 Stephen C. Johnson 在 1962 年设计。它主要用于文本处理，特别是在模式匹配【7】和字符串操作方面具有强大的功能。Snobol4 的语法简洁，易于理解，但同时也因其独特的语法结构而具有一定的学习难度。
HTML 视频标签解析
HTML 视频标签（``）用于在网页中嵌入视频内容。它允许用户指定视频的源文件【8】、播放器控件【9】、自动播放【10】等属性。以下是一个简单的 HTML 视频标签示例：
html
Your browser does not support the video tag.
我们的目标是使用 snobol【2】4 语言来解析这个视频标签，提取出视频的源文件和类型信息。
Snobol4 代码实现
以下是一个使用 Snobol4 语言编写的视频标签解析器的示例代码：
```snobol
:parse【11】-video【12】
input【13】
[ "video" ] " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " 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Comments NOTHING