/// Semantic label of a span.
#[derive(Debug, Clone, PartialEq, Hash, Eq)]
pub enum Token {
/// Attention sequence.
///
/// > 👉 **Note**: this is used while parsing but compiled away.
AttentionSequence,
/// Whole autolink.
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`AutolinkEmail`][Token::AutolinkEmail],
/// [`AutolinkMarker`][Token::AutolinkMarker],
/// [`AutolinkProtocol`][Token::AutolinkProtocol]
/// * **Construct**:
/// [`autolink`][crate::construct::autolink]
///
/// ## Example
///
/// ```markdown
/// > | <https://example.com> and <admin@example.com>
/// ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^
/// ```
Autolink,
/// Email autolink w/o markers.
///
/// ## Info
///
/// * **Context**:
/// [`Autolink`][Token::Autolink]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`autolink`][crate::construct::autolink]
///
/// ## Example
///
/// ```markdown
/// > | <admin@example.com>
/// ^^^^^^^^^^^^^^^^^
/// ```
AutolinkEmail,
/// Marker of an autolink.
///
/// ## Info
///
/// * **Context**:
/// [`Autolink`][Token::Autolink]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`autolink`][crate::construct::autolink]
///
/// ## Example
///
/// ```markdown
/// > | <https://example.com>
/// ^ ^
/// ```
AutolinkMarker,
/// Protocol autolink w/o markers.
///
/// ## Info
///
/// * **Context**:
/// [`Autolink`][Token::Autolink]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`autolink`][crate::construct::autolink]
///
/// ## Example
///
/// ```markdown
/// > | <https://example.com>
/// ^^^^^^^^^^^^^^^^^^^
/// ```
AutolinkProtocol,
/// Line ending preceded only by whitespace or nothing at all.
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`blank_line`][crate::construct::blank_line]
///
/// ## Example
///
/// ```markdown
/// > | ␠␠␊
/// ^
/// ```
BlankLineEnding,
/// Whole block quote.
///
/// ## Info
///
/// * **Context**:
/// [document content][crate::content::document]
/// * **Content model**:
/// [`BlockQuotePrefix`][Token::BlockQuotePrefix],
/// [flow content][crate::content::flow]
/// * **Construct**:
/// [`block_quote`][crate::construct::block_quote]
///
/// ## Example
///
/// ```markdown
/// > | > a
/// ^^^
/// > | b
/// ^
/// ```
BlockQuote,
/// Block quote marker.
///
/// ## Info
///
/// * **Context**:
/// [`BlockQuotePrefix`][Token::BlockQuotePrefix]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`block_quote`][crate::construct::block_quote]
///
/// ## Example
///
/// ```markdown
/// > | > a
/// ^
/// | b
/// ```
BlockQuoteMarker,
/// Block quote prefix.
///
/// ## Info
///
/// * **Context**:
/// [`BlockQuote`][Token::BlockQuote]
/// * **Content model**:
/// [`BlockQuoteMarker`][Token::BlockQuoteMarker],
/// [`BlockQuoteWhitespace`][Token::BlockQuoteWhitespace]
/// * **Construct**:
/// [`block_quote`][crate::construct::block_quote]
///
/// ## Example
///
/// ```markdown
/// > | > a
/// ^^
/// | b
/// ```
BlockQuotePrefix,
/// Block quote white space.
///
/// ## Info
///
/// * **Context**:
/// [`BlockQuotePrefix`][Token::BlockQuotePrefix]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`block_quote`][crate::construct::block_quote]
///
/// ## Example
///
/// ```markdown
/// > | > a
/// ^
/// | b
/// ```
BlockQuoteWhitespace,
/// Whole character escape.
///
/// ## Info
///
/// * **Context**:
/// [string content][crate::content::string] or
/// [text content][crate::content::text]
/// * **Content model**:
/// [`CharacterEscapeMarker`][Token::CharacterEscapeMarker],
/// [`CharacterEscapeValue`][Token::CharacterEscapeValue]
/// * **Construct**:
/// [`character_escape`][crate::construct::character_escape]
///
/// ## Example
///
/// ```markdown
/// > | a \- b
/// ^^
/// ```
CharacterEscape,
/// Character escape marker.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterEscape`][Token::CharacterEscape]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_escape`][crate::construct::character_escape]
///
/// ## Example
///
/// ```markdown
/// > | a \- b
/// ^
/// ```
CharacterEscapeMarker,
/// Character escape value.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterEscape`][Token::CharacterEscape]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_escape`][crate::construct::character_escape]
///
/// ## Example
///
/// ```markdown
/// > | a \- b
/// ^
/// ```
CharacterEscapeValue,
/// Whole character reference.
///
/// ## Info
///
/// * **Context**:
/// [string content][crate::content::string] or
/// [text content][crate::content::text]
/// * **Content model**:
/// [`CharacterReferenceMarker`][Token::CharacterReferenceMarker],
/// [`CharacterReferenceMarkerHexadecimal`][Token::CharacterReferenceMarkerHexadecimal],
/// [`CharacterReferenceMarkerNumeric`][Token::CharacterReferenceMarkerNumeric],
/// [`CharacterReferenceMarkerSemi`][Token::CharacterReferenceMarkerSemi],
/// [`CharacterReferenceValue`][Token::CharacterReferenceValue]
/// * **Construct**:
/// [`character_reference`][crate::construct::character_reference]
///
/// ## Example
///
/// ```markdown
/// > | a & b ≠ c 𝌆 d
/// ^^^^^ ^^^^^^^ ^^^^^^^^^
/// ```
CharacterReference,
/// Character reference opening marker.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterReference`][Token::CharacterReference]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_reference`][crate::construct::character_reference]
///
/// ## Example
///
/// ```markdown
/// > | a & b ≠ c 𝌆 d
/// ^ ^ ^
/// ```
CharacterReferenceMarker,
/// Character reference hexadecimal numeric marker.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterReference`][Token::CharacterReference]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_reference`][crate::construct::character_reference]
///
/// ## Example
///
/// ```markdown
/// > | a & b ≠ c 𝌆 d
/// ^
/// ```
CharacterReferenceMarkerHexadecimal,
/// Character reference numeric marker.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterReference`][Token::CharacterReference]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_reference`][crate::construct::character_reference]
///
/// ## Example
///
/// ```markdown
/// > | a & b ≠ c 𝌆 d
/// ^ ^
/// ```
CharacterReferenceMarkerNumeric,
/// Character reference closing marker.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterReference`][Token::CharacterReference]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_reference`][crate::construct::character_reference]
///
/// ## Example
///
/// ```markdown
/// > | a & b ≠ c 𝌆 d
/// ^ ^ ^
/// ```
CharacterReferenceMarkerSemi,
/// Character reference value.
///
/// ## Info
///
/// * **Context**:
/// [`CharacterReference`][Token::CharacterReference]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`character_reference`][crate::construct::character_reference]
///
/// ## Example
///
/// ```markdown
/// > | a & b ≠ c 𝌆 d
/// ^^^ ^^^^ ^^^^^
/// ```
CharacterReferenceValue,
/// Whole code (fenced).
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`CodeFencedFence`][Token::CodeFencedFence],
/// [`CodeFlowChunk`][Token::CodeFlowChunk],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced]
///
/// ## Example
///
/// ````markdown
/// > | ```js
/// ^^^^^
/// > | console.log(1)
/// ^^^^^^^^^^^^^^
/// > | ```
/// ^^^
/// ````
CodeFenced,
/// A code (fenced) fence.
///
/// ## Info
///
/// * **Context**:
/// [`CodeFenced`][Token::CodeFenced]
/// * **Content model**:
/// [`CodeFencedFenceInfo`][Token::CodeFencedFenceInfo],
/// [`CodeFencedFenceMeta`][Token::CodeFencedFenceMeta],
/// [`CodeFencedFenceSequence`][Token::CodeFencedFenceSequence],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced]
///
/// ## Example
///
/// ````markdown
/// > | ```js
/// ^^^^^
/// | console.log(1)
/// > | ```
/// ^^^
/// ````
CodeFencedFence,
/// A code (fenced) fence info word.
///
/// ## Info
///
/// * **Context**:
/// [`CodeFencedFence`][Token::CodeFencedFence]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced]
///
/// ## Example
///
/// ````markdown
/// > | ```js
/// ^^
/// | console.log(1)
/// | ```
/// ````
CodeFencedFenceInfo,
/// A code (fenced) fence meta string.
///
/// ## Info
///
/// * **Context**:
/// [`CodeFencedFence`][Token::CodeFencedFence]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced]
///
/// ## Example
///
/// ````markdown
/// > | ```js highlight="1"
/// ^^^^^^^^^^^^^
/// | console.log(1)
/// | ```
/// ````
CodeFencedFenceMeta,
/// A code (fenced) fence sequence.
///
/// ## Info
///
/// * **Context**:
/// [`CodeFencedFenceSequence`][Token::CodeFencedFenceSequence]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced]
///
/// ## Example
///
/// ````markdown
/// > | ```js
/// ^^^
/// | console.log(1)
/// > | ```
/// ^^^
/// ````
CodeFencedFenceSequence,
/// A code (fenced, indented) chunk.
///
/// ## Info
///
/// * **Context**:
/// [`CodeFenced`][Token::CodeFenced],
/// [`CodeIndented`][Token::CodeIndented]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced],
/// [`code_indented`][crate::construct::code_indented]
///
/// ## Example
///
/// ````markdown
/// | ```js
/// > | console.log(1)
/// ^^^^^^^^^^^^^^
/// | ```
/// ````
///
/// ```markdown
/// > | ␠␠␠␠console.log(1)
/// ^^^^^^^^^^^^^^
/// ```
CodeFlowChunk,
/// Whole code (indented).
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`CodeFlowChunk`][Token::CodeFlowChunk],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`code_fenced`][crate::construct::code_fenced]
///
/// ## Example
///
/// ```markdown
/// ␠␠␠␠console.log(1)
/// ^^^^^^^^^^^^^^^^^^
/// ```
CodeIndented,
/// Whole code (text).
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`CodeTextData`][Token::CodeTextData],
/// [`CodeTextSequence`][Token::CodeTextSequence],
/// [`CodeTextLineEnding`][Token::CodeTextLineEnding]
/// * **Construct**:
/// [`code_text`][crate::construct::code_text]
///
/// ## Example
///
/// ```markdown
/// > | a `b` c
/// ^^^
/// ```
CodeText,
/// Code (text) data.
///
/// ## Info
///
/// * **Context**:
/// [`CodeText`][Token::CodeText],
/// * **Content model**:
/// void
/// * **Construct**:
/// [`code_text`][crate::construct::code_text]
///
/// ## Example
///
/// ```markdown
/// > | a `b` c
/// ^
/// ```
CodeTextData,
/// Line ending in code (text).
///
/// ## Info
///
/// * **Context**:
/// [`CodeText`][Token::CodeText],
/// * **Content model**:
/// void
/// * **Construct**:
/// [`code_text`][crate::construct::code_text]
///
/// ## Example
///
/// ```markdown
/// > | a `b␊
/// ^
/// | c` d
/// ```
CodeTextLineEnding,
/// Code (text) sequence.
///
/// ## Info
///
/// * **Context**:
/// [`CodeText`][Token::CodeText],
/// * **Content model**:
/// void
/// * **Construct**:
/// [`code_text`][crate::construct::code_text]
///
/// ## Example
///
/// ```markdown
/// > | a `b` c
/// ^ ^
/// ```
CodeTextSequence,
/// Data.
///
/// ## Info
///
/// * **Context**:
/// [string content][crate::content::string],
/// [text content][crate::content::text]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`data`][crate::construct::partial_data]
///
/// ## Example
///
/// ```markdown
/// > | aa *bb* cc
/// ^^^ ^^ ^^^
/// ```
Data,
/// Whole definition.
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`DefinitionMarker`][Token::DefinitionMarker],
/// [`DefinitionLabel`][Token::DefinitionLabel],
/// [`DefinitionDestination`][Token::DefinitionDestination],
/// [`DefinitionTitle`][Token::DefinitionTitle],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`definition`][crate::construct::definition]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^^^^^^^^^^
/// ```
Definition,
/// Whole definition destination.
///
/// ## Info
///
/// * **Context**:
/// [`Definition`][Token::Definition]
/// * **Content model**:
/// [`DefinitionDestinationLiteral`][Token::DefinitionDestinationLiteral],
/// [`DefinitionDestinationRaw`][Token::DefinitionDestinationRaw]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^
/// > | [a]: <b> "c"
/// ^^^
/// ```
DefinitionDestination,
/// Definition destination literal.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionDestination`][Token::DefinitionDestination]
/// * **Content model**:
/// [`DefinitionDestinationLiteralMarker`][Token::DefinitionDestinationLiteralMarker],
/// [`DefinitionDestinationString`][Token::DefinitionDestinationString]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | [a]: <b> "c"
/// ^^^
/// ```
DefinitionDestinationLiteral,
/// Definition destination literal marker.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionDestinationLiteral`][Token::DefinitionDestinationLiteral]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | [a]: <b> "c"
/// ^ ^
/// ```
DefinitionDestinationLiteralMarker,
/// Definition destination raw.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionDestination`][Token::DefinitionDestination]
/// * **Content model**:
/// [`DefinitionDestinationString`][Token::DefinitionDestinationString]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^
/// ```
DefinitionDestinationRaw,
/// Definition destination data.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionDestinationLiteral`][Token::DefinitionDestinationLiteral],
/// [`DefinitionDestinationRaw`][Token::DefinitionDestinationRaw]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^
/// > | [a]: <b> "c"
/// ^
/// ```
DefinitionDestinationString,
/// Whole definition label.
///
/// ## Info
///
/// * **Context**:
/// [`Definition`][Token::Definition]
/// * **Content model**:
/// [`DefinitionLabelMarker`][Token::DefinitionLabelMarker],
/// [`DefinitionLabelString`][Token::DefinitionLabelString],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`label`][crate::construct::partial_label]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^^^
/// ```
DefinitionLabel,
/// Definition label marker.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionLabel`][Token::DefinitionLabel]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`label`][crate::construct::partial_label]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^ ^
/// ```
DefinitionLabelMarker,
/// Definition label data.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionLabel`][Token::DefinitionLabel]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`label`][crate::construct::partial_label]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^
/// ```
DefinitionLabelString,
/// Definition marker.
///
/// ## Info
///
/// * **Context**:
/// [`Definition`][Token::Definition]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`definition`][crate::construct::definition]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^
/// ```
DefinitionMarker,
/// Whole definition title.
///
/// ## Info
///
/// * **Context**:
/// [`Definition`][Token::Definition]
/// * **Content model**:
/// [`DefinitionTitleMarker`][Token::DefinitionTitleMarker],
/// [`DefinitionTitleString`][Token::DefinitionTitleString],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`title`][crate::construct::partial_title]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^^^
/// ```
DefinitionTitle,
/// Definition title marker.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionTitle`][Token::DefinitionTitle]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`title`][crate::construct::partial_title]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^ ^
/// ```
DefinitionTitleMarker,
/// Definition title data.
///
/// ## Info
///
/// * **Context**:
/// [`DefinitionTitle`][Token::DefinitionTitle]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`title`][crate::construct::partial_title]
///
/// ## Example
///
/// ```markdown
/// > | [a]: b "c"
/// ^
/// ```
DefinitionTitleString,
/// Emphasis.
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`EmphasisSequence`][Token::EmphasisSequence],
/// [`EmphasisText`][Token::EmphasisText]
/// * **Construct**:
/// [`attention`][crate::construct::attention]
///
/// ## Example
///
/// ```markdown
/// > | *a*
/// ^^^
/// ```
Emphasis,
/// Emphasis sequence.
///
/// ## Info
///
/// * **Context**:
/// [`Emphasis`][Token::Emphasis]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`attention`][crate::construct::attention]
///
/// ## Example
///
/// ```markdown
/// > | *a*
/// ^ ^
/// ```
EmphasisSequence,
/// Emphasis text.
///
/// ## Info
///
/// * **Context**:
/// [`Emphasis`][Token::Emphasis]
/// * **Content model**:
/// [text content][crate::content::text]
/// * **Construct**:
/// [`attention`][crate::construct::attention]
///
/// ## Example
///
/// ```markdown
/// > | *a*
/// ^
/// ```
EmphasisText,
/// Whole hard break (escape).
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`HardBreakEscapeMarker`][Token::HardBreakEscapeMarker]
/// * **Construct**:
/// [`hard_break_escape`][crate::construct::hard_break_escape]
///
/// ## Example
///
/// ```markdown
/// > | a\␊
/// ^^
/// > | b
/// ```
HardBreakEscape,
/// Hard break (escape) marker.
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`hard_break_escape`][crate::construct::hard_break_escape]
///
/// ## Example
///
/// ```markdown
/// > | a\␊
/// ^
/// > | b
/// ```
HardBreakEscapeMarker,
/// Whole hard break (trailing).
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`HardBreakTrailingSpace`][Token::HardBreakTrailingSpace]
/// * **Construct**:
/// [`hard_break_trailing`][crate::construct::hard_break_trailing]
///
/// ## Example
///
/// ```markdown
/// > | a␠␠␊
/// ^^^
/// > | b
/// ```
HardBreakTrailing,
/// Hard break (trailing) spaces.
///
/// ## Info
///
/// * **Context**:
/// [`HardBreakTrailing`][Token::HardBreakTrailing]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`hard_break_trailing`][crate::construct::hard_break_trailing]
///
/// ## Example
///
/// ```markdown
/// > | a␠␠␊
/// ^^
/// > | b
/// ```
HardBreakTrailingSpace,
/// Whole heading (atx).
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`HeadingAtxSequence`][Token::HeadingAtxSequence],
/// [`HeadingAtxText`][Token::HeadingAtxText],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`heading_atx`][crate::construct::heading_atx]
///
/// ## Example
///
/// ```markdown
/// > | # alpha
/// ^^^^^^^
/// ```
HeadingAtx,
/// Heading (atx) sequence.
///
/// ## Info
///
/// * **Context**:
/// [`HeadingAtx`][Token::HeadingAtx]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`heading_atx`][crate::construct::heading_atx]
///
/// ## Example
///
/// ```markdown
/// > | # alpha
/// ^
/// ```
HeadingAtxSequence,
/// Heading (atx) data.
///
/// ## Info
///
/// * **Context**:
/// [`HeadingAtx`][Token::HeadingAtx],
/// * **Content model**:
/// [text content][crate::content::text]
/// * **Construct**:
/// [`heading_atx`][crate::construct::heading_atx]
///
/// ## Example
///
/// ```markdown
/// > | # alpha
/// ^^^^^
/// ```
HeadingAtxText,
/// Whole heading (setext).
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`HeadingSetextText`][Token::HeadingSetextText],
/// [`HeadingSetextUnderline`][Token::HeadingSetextUnderline],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`heading_setext`][crate::construct::heading_setext]
///
/// ## Example
///
/// ```markdown
/// > | alpha
/// ^^^^^
/// > | =====
/// ^^^^^
/// ```
HeadingSetext,
/// Heading (setext) data.
///
/// ## Info
///
/// * **Context**:
/// [`HeadingSetext`][Token::HeadingSetext]
/// * **Content model**:
/// [text content][crate::content::text]
/// * **Construct**:
/// [`heading_setext`][crate::construct::heading_setext]
///
/// ## Example
///
/// ```markdown
/// > | alpha
/// ^^^^^
/// | =====
/// ```
HeadingSetextText,
/// Heading (setext) underline.
///
/// ## Info
///
/// * **Context**:
/// [`HeadingSetext`][Token::HeadingSetext]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`heading_setext`][crate::construct::heading_setext]
///
/// ## Example
///
/// ```markdown
/// | alpha
/// > | =====
/// ^^^^^
/// ```
HeadingSetextUnderline,
/// Whole html (flow).
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`HtmlFlowData`][Token::HtmlFlowData],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`html_flow`][crate::construct::html_flow]
///
/// ## Example
///
/// ```markdown
/// > | <div>
/// ^^^^^
/// ```
HtmlFlow,
/// HTML (flow) data.
///
/// ## Info
///
/// * **Context**:
/// [`HtmlFlow`][Token::HtmlFlow],
/// * **Content model**:
/// void
/// * **Construct**:
/// [`html_flow`][crate::construct::html_flow]
///
/// ## Example
///
/// ```markdown
/// > | <div>
/// ^^^^^
/// ```
HtmlFlowData,
/// Whole html (text).
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`HtmlTextData`][Token::HtmlTextData],
/// [`LineEnding`][Token::LineEnding],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`html_text`][crate::construct::html_text]
///
/// ## Example
///
/// ```markdown
/// > | a <b> c
/// ^^^
/// ```
HtmlText,
/// HTML (text) data.
///
/// ## Info
///
/// * **Context**:
/// [`HtmlText`][Token::HtmlText]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`html_text`][crate::construct::html_text]
///
/// ## Example
///
/// ```markdown
/// > | a <b> c
/// ^^^
/// ```
HtmlTextData,
/// Image.
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`Label`][Token::Label],
/// [`Resource`][Token::Resource],
/// [`Reference`][Token::Reference]
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a ![b] c
/// ^^^^
/// > | a ![b][c] d
/// ^^^^^^^
/// > | a  d
/// ^^^^^^^
/// ```
Image,
/// Label.
///
/// ## Info
///
/// * **Context**:
/// [`Image`][Token::Image],
/// [`Link`][Token::Link]
/// * **Content model**:
/// [`LabelImage`][Token::LabelImage],
/// [`LabelLink`][Token::LabelLink],
/// [`LabelEnd`][Token::LabelEnd],
/// [`LabelText`][Token::LabelText]
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a [b] c
/// ^^^
/// > | a ![b][c] d
/// ^^^^
/// > | a [b](c) d
/// ^^^
/// ```
Label,
/// Label end.
///
/// ## Info
///
/// * **Context**:
/// [`Label`][Token::Label]
/// * **Content model**:
/// [`LabelMarker`][Token::LabelMarker]
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a  d
/// ^
/// > | a [b](c) d
/// ^
/// ```
LabelEnd,
/// Label start (image).
///
/// ## Info
///
/// * **Context**:
/// [`Label`][Token::Label]
/// * **Content model**:
/// [`LabelImageMarker`][Token::LabelImageMarker],
/// [`LabelMarker`][Token::LabelMarker]
/// * **Construct**:
/// [`label_start_image`][crate::construct::label_start_image]
///
/// ## Example
///
/// ```markdown
/// > | a  d
/// ^^
/// ```
LabelImage,
/// Label start (image) marker.
///
/// ## Info
///
/// * **Context**:
/// [`LabelImage`][Token::LabelImage]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`label_start_image`][crate::construct::label_start_image]
///
/// ## Example
///
/// ```markdown
/// > | a  d
/// ^
/// ```
LabelImageMarker,
/// Label start (link).
///
/// ## Info
///
/// * **Context**:
/// [`Label`][Token::Label]
/// * **Content model**:
/// [`LabelMarker`][Token::LabelMarker]
/// * **Construct**:
/// [`label_start_link`][crate::construct::label_start_link]
///
/// ## Example
///
/// ```markdown
/// > | a [b](c) d
/// ^
/// ```
LabelLink,
/// Label marker.
///
/// ## Info
///
/// * **Context**:
/// [`LabelImage`][Token::LabelImage],
/// [`LabelLink`][Token::LabelLink],
/// [`LabelEnd`][Token::LabelEnd]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`label_start_image`][crate::construct::label_start_image],
/// [`label_start_link`][crate::construct::label_start_link],
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a  d
/// ^ ^
/// > | a [b](c) d
/// ^ ^
/// ```
LabelMarker,
/// Label text.
///
/// ## Info
///
/// * **Context**:
/// [`Label`][Token::Label]
/// * **Content model**:
/// [text content][crate::content::text]
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a [b] c
/// ^
/// > | a ![b][c] d
/// ^
/// > | a [b](c) d
/// ^
/// ```
LabelText,
/// Line ending.
///
/// ## Info
///
/// * **Context**:
/// basically everywhere
/// * **Content model**:
/// void
/// * **Construct**:
/// n/a
///
/// ## Example
///
/// ```markdown
/// > | a␊
/// ^
/// | b
/// ```
LineEnding,
/// Link.
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`Label`][Token::Label],
/// [`Resource`][Token::Resource],
/// [`Reference`][Token::Reference]
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a [b] c
/// ^^^
/// > | a [b][c] d
/// ^^^^^^
/// > | a [b](c) d
/// ^^^^^^
/// ```
Link,
/// Whole paragraph.
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [text content][crate::content::text]
/// * **Construct**:
/// [`paragraph`][crate::construct::paragraph]
///
/// ## Example
///
/// ```markdown
/// > | a b
/// ^^^
/// > | c.
/// ^^
/// ```
Paragraph,
/// Reference.
///
/// ## Info
///
/// * **Context**:
/// [`Image`][Token::Image],
/// [`Link`][Token::Link]
/// * **Content model**:
/// [`ReferenceMarker`][Token::ReferenceMarker],
/// [`ReferenceString`][Token::ReferenceString]
/// * **Construct**:
/// [`label`][crate::construct::partial_label]
///
/// ## Example
///
/// ```markdown
/// > | a ![b][c] d
/// ^^^
/// ```
Reference,
/// Reference marker.
///
/// ## Info
///
/// * **Context**:
/// [`Reference`][Token::Reference]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`label`][crate::construct::partial_label]
///
/// ## Example
///
/// ```markdown
/// > | a ![b][c] d
/// ^ ^
/// ```
ReferenceMarker,
/// Reference string.
///
/// ## Info
///
/// * **Context**:
/// [`Reference`][Token::Reference]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`label`][crate::construct::partial_label]
///
/// ## Example
///
/// ```markdown
/// > | a ![b][c] d
/// ^
/// ```
ReferenceString,
/// Resource.
///
/// ## Info
///
/// * **Context**:
/// [`Image`][Token::Image],
/// [`Link`][Token::Link]
/// * **Content model**:
/// [`ResourceMarker`][Token::ResourceMarker],
/// [`ResourceDestination`][Token::ResourceDestination],
/// [`ResourceTitle`][Token::ResourceTitle],
/// [`SpaceOrTab`][Token::SpaceOrTab],
/// [`LineEnding`][Token::LineEnding]
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^^^^^^^
/// > | a [b](c) d
/// ^^^
/// ```
Resource,
/// Resource destination.
///
/// ## Info
///
/// * **Context**:
/// [`Resource`][Token::Resource]
/// * **Content model**:
/// [`ResourceDestinationLiteral`][Token::ResourceDestinationLiteral],
/// [`ResourceDestinationRaw`][Token::ResourceDestinationRaw]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^
/// ```
ResourceDestination,
/// Resource destination literal.
///
/// ## Info
///
/// * **Context**:
/// [`ResourceDestination`][Token::ResourceDestination]
/// * **Content model**:
/// [`ResourceDestinationLiteralMarker`][Token::ResourceDestinationLiteralMarker],
/// [`ResourceDestinationString`][Token::ResourceDestinationString]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^^^
/// ```
ResourceDestinationLiteral,
/// Resource destination literal marker.
///
/// ## Info
///
/// * **Context**:
/// [`ResourceDestinationLiteral`][Token::ResourceDestinationLiteral]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^ ^
/// ```
ResourceDestinationLiteralMarker,
/// Resource destination raw.
///
/// ## Info
///
/// * **Context**:
/// [`ResourceDestination`][Token::ResourceDestination]
/// * **Content model**:
/// [`ResourceDestinationString`][Token::ResourceDestinationString]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^
/// ```
ResourceDestinationRaw,
/// Resource destination raw.
///
/// ## Info
///
/// * **Context**:
/// [`ResourceDestinationLiteral`][Token::ResourceDestinationLiteral],
/// [`ResourceDestinationRaw`][Token::ResourceDestinationRaw]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`destination`][crate::construct::partial_destination]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^
/// > | a  e
/// ^
/// ```
ResourceDestinationString,
/// Resource marker.
///
/// ## Info
///
/// * **Context**:
/// [`Resource`][Token::Resource]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`label_end`][crate::construct::label_end]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^ ^
/// ```
ResourceMarker,
/// Resource title.
///
/// ## Info
///
/// * **Context**:
/// [`Resource`][Token::Resource]
/// * **Content model**:
/// [`ResourceTitleMarker`][Token::ResourceTitleMarker],
/// [`ResourceTitleString`][Token::ResourceTitleString]
/// * **Construct**:
/// [`title`][crate::construct::partial_title]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^^^
/// ```
ResourceTitle,
/// Resource title marker.
///
/// ## Info
///
/// * **Context**:
/// [`ResourceTitle`][Token::ResourceTitle]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`title`][crate::construct::partial_title]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^ ^
/// ```
ResourceTitleMarker,
/// Resource title string.
///
/// ## Info
///
/// * **Context**:
/// [`ResourceTitle`][Token::ResourceTitle]
/// * **Content model**:
/// [string content][crate::content::string]
/// * **Construct**:
/// [`title`][crate::construct::partial_title]
///
/// ## Example
///
/// ```markdown
/// > | a  e
/// ^
/// ```
ResourceTitleString,
/// SpaceOrTab.
///
/// ## Info
///
/// * **Context**:
/// basically everywhere
/// * **Content model**:
/// void
/// * **Construct**:
/// n/a
///
/// ## Example
///
/// ```markdown
/// > | ␠* * *␠
/// ^ ^ ^ ^
/// ```
SpaceOrTab,
/// Strong.
///
/// ## Info
///
/// * **Context**:
/// [text content][crate::content::text]
/// * **Content model**:
/// [`StrongSequence`][Token::StrongSequence],
/// [`StrongText`][Token::StrongText]
/// * **Construct**:
/// [`attention`][crate::construct::attention]
///
/// ## Example
///
/// ```markdown
/// > | **a**
/// ^^^^^
/// ```
Strong,
/// Strong sequence.
///
/// ## Info
///
/// * **Context**:
/// [`Strong`][Token::Strong]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`attention`][crate::construct::attention]
///
/// ## Example
///
/// ```markdown
/// > | **a**
/// ^^ ^^
/// ```
StrongSequence,
/// Strong text.
///
/// ## Info
///
/// * **Context**:
/// [`Strong`][Token::Strong]
/// * **Content model**:
/// [text content][crate::content::text]
/// * **Construct**:
/// [`attention`][crate::construct::attention]
///
/// ## Example
///
/// ```markdown
/// > | **a**
/// ^
/// ```
StrongText,
/// Whole thematic break.
///
/// ## Info
///
/// * **Context**:
/// [flow content][crate::content::flow]
/// * **Content model**:
/// [`ThematicBreakSequence`][Token::ThematicBreakSequence],
/// [`SpaceOrTab`][Token::SpaceOrTab]
/// * **Construct**:
/// [`thematic_break`][crate::construct::thematic_break]
///
/// ## Example
///
/// ```markdown
/// > | * * *
/// ^^^^^
/// ```
ThematicBreak,
/// Thematic break sequence.
///
/// ## Info
///
/// * **Context**:
/// [`ThematicBreak`][Token::ThematicBreak]
/// * **Content model**:
/// void
/// * **Construct**:
/// [`thematic_break`][crate::construct::thematic_break]
///
/// ## Example
///
/// ```markdown
/// > | * * *
/// ^ ^ ^
/// ```
ThematicBreakSequence,
// To do: sort.
List,
ListItemPrefix,
ListItemValue,
ListItemMarker,
// ListItemPrefixSpaceOrTab,
}
