Module attributes 

Parsing for Pandoc-style attributes: {#id .class key=value}

Attributes can appear after headings, fenced code blocks, fenced divs, etc. Syntax: {#identifier .class1 .class2 key1=val1 key2=“val2”}

Rules:

• Surrounded by { }
• Identifier: #id (optional, only first one counts)
• Classes: .class (can have multiple)
• Key-value pairs: key=value or key=“value” or key=‘value’ (can have multiple)
• Whitespace flexible between items

Structs

AttributeBlock

Functions

emit_attributes

Emit attribute block as AST nodes

parse_attribute_content

Parse the content inside the attribute braces

parse_html_attribute_list

Parse a raw HTML attribute list (the bytes between a tag name and the closing >, exclusive). Accepts inputs like id="x" class="a b" data-key=v and produces an AttributeBlock. Returns None if no recognized attributes are present.

parse_html_tag_attributes

Parse HTML-style attributes from a raw HTML opening tag text such as <div id="x" class="a b" data-key="v">, returning the same AttributeBlock shape as Pandoc-style brace attributes. Whitespace- separated class="..." is split into individual classes; id="..." becomes the identifier; everything else becomes a key/value pair. Returns None if the tag has no recognized attributes.

try_parse_trailing_attributes

Try to parse an attribute block from the end of a string Returns: (attribute_block, text_before_attributes)

try_parse_trailing_attributes_with_pos

Try to parse an attribute block from the end of a string. Returns: (attribute_block, text_before_attributes, open_brace_position_in_trimmed_text)