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use std::rc::Rc;
use super::*;
/// A syntax node, encompassing a single logical entity of parsed source code.
#[derive(Debug, Clone, PartialEq)]
pub enum Node {
/// Plain text.
Text(String),
/// Whitespace containing less than two newlines.
Space,
/// A forced line break: `\`.
Linebreak(Span),
/// A paragraph break: Two or more newlines.
Parbreak(Span),
/// Strong text was enabled / disabled: `*`.
Strong(Span),
/// Emphasized text was enabled / disabled: `_`.
Emph(Span),
/// A raw block with optional syntax highlighting: `` `...` ``.
Raw(RawNode),
/// A section heading: `= Introduction`.
Heading(HeadingNode),
/// An item in an unordered list: `- ...`.
List(ListItem),
/// An item in an enumeration (ordered list): `1. ...`.
Enum(EnumItem),
/// An expression.
Expr(Expr),
}
/// A raw block with optional syntax highlighting: `` `...` ``.
#[derive(Debug, Clone, PartialEq)]
pub struct RawNode {
/// The source code location.
pub span: Span,
/// An optional identifier specifying the language to syntax-highlight in.
pub lang: Option<Ident>,
/// The raw text, determined as the raw string between the backticks trimmed
/// according to the above rules.
pub text: String,
/// Whether the element is block-level, that is, it has 3+ backticks
/// and contains at least one newline.
pub block: bool,
}
/// A section heading: `= Introduction`.
#[derive(Debug, Clone, PartialEq)]
pub struct HeadingNode {
/// The source code location.
pub span: Span,
/// The section depth (numer of equals signs).
pub level: usize,
/// The contents of the heading.
pub body: Rc<Tree>,
}
/// An item in an unordered list: `- ...`.
#[derive(Debug, Clone, PartialEq)]
pub struct ListItem {
/// The source code location.
pub span: Span,
/// The contents of the list item.
pub body: Tree,
}
/// An item in an enumeration (ordered list): `1. ...`.
#[derive(Debug, Clone, PartialEq)]
pub struct EnumItem {
/// The source code location.
pub span: Span,
/// The number, if any.
pub number: Option<usize>,
/// The contents of the list item.
pub body: Tree,
}
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