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use crate::foundations::elem;
use crate::layout::{Abs, Angle, Axes, Length, Rel};
use crate::visualize::Stroke;
/// A line from one point to another.
///
/// # Example
/// ```example
/// #set page(height: 100pt)
///
/// #line(length: 100%)
/// #line(end: (50%, 50%))
/// #line(
/// length: 4cm,
/// stroke: 2pt + maroon,
/// )
/// ```
#[elem]
pub struct LineElem {
/// The start point of the line.
///
/// Must be an array of exactly two relative lengths.
pub start: Axes<Rel<Length>>,
/// The point where the line ends.
pub end: Option<Axes<Rel<Length>>>,
/// The line's length. This is only respected if `end` is `{none}`.
#[default(Abs::pt(30.0).into())]
pub length: Rel<Length>,
/// The angle at which the line points away from the origin. This is only
/// respected if `end` is `{none}`.
pub angle: Angle,
/// How to [stroke] the line.
///
/// ```example
/// #set line(length: 100%)
/// #stack(
/// spacing: 1em,
/// line(stroke: 2pt + red),
/// line(stroke: (paint: blue, thickness: 4pt, cap: "round")),
/// line(stroke: (paint: blue, thickness: 1pt, dash: "dashed")),
/// line(stroke: (paint: blue, thickness: 1pt, dash: ("dot", 2pt, 4pt, 2pt))),
/// )
/// ```
#[fold]
pub stroke: Stroke,
}
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