Enum DocNode 

pub enum DocNode {
    Empty,
    Text(String),
    Line(usize),
    Cat(Box<DocNode>, Box<DocNode>),
    Indent(usize, Box<DocNode>),
    Group(Box<DocNode>),
}

A document algebra node.

Variants

Empty

Empty document

Text(String)

A text string

Line(usize)

A newline followed by indentation

Cat(Box<DocNode>, Box<DocNode>)

Horizontal concatenation

Indent(usize, Box<DocNode>)

Nested indentation

Group(Box<DocNode>)

A group that prefers to be on one line

Implementations

impl DocNode

pub fn text(s: &str) -> Self

Create a text node.

pub fn line(indent: usize) -> Self

Create a line break with indent level.

pub fn cat(a: DocNode, b: DocNode) -> Self

Concatenate two docs.

pub fn indent(n: usize, doc: DocNode) -> Self

Indent a document.

pub fn group(doc: DocNode) -> Self

Group a document.

pub fn render(&self, width: usize) -> String

Render the document to a string (simplified: ignores group optimization).

Trait Implementations

impl Clone for DocNode

fn clone(&self) -> DocNode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DocNode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.