Module parsers 

Text formatting parsers: HTML and Markdown ↔ Telegram [MessageEntity]

Markdown (Telegram-flavoured)

Parsing (parse_markdown)

Syntax	Entity
**bold** or *bold*	Bold
__italic__ or _italic_	Italic
~~strike~~	Strikethrough
||spoiler||	Spoiler
`code`	Code
```lang\npre\n```	Pre (code block)
[text](url)	TextUrl
[text](tg://user?id=123)	MentionName
	CustomEmoji
\*, \_, \~ …	Escaped literal char

Generating (generate_markdown)

Produces the same syntax above for all supported entity types. Underline has no unambiguous markdown delimiter and is silently skipped.

HTML

Supported tags: <b>, <strong>, <i>, <em>, <u>, <s>, <del>, <code>, <pre>, <tg-spoiler>, <a href="url">, <tg-emoji emoji-id="id">text</tg-emoji>

Feature gates

• html : enables parse_html / generate_html via the built-in hand-rolled parser (zero extra deps).
• html5ever: replaces parse_html with a spec-compliant html5ever tokenizer. generate_html is always the same hand-rolled generator.

Functions

generate_html

Generate Telegram-compatible HTML from plain text + entities.

generate_markdown

Generate Telegram markdown from plain text + entities.

parse_htmlhtml5ever

Parse a Telegram-compatible HTML string into (plain_text, entities).

parse_markdown

Parse Telegram-flavoured markdown into (plain_text, entities).