Trait Transform 

pub trait Transform: Send + Sync {
    // Required methods
    fn input(&self) -> TreeKind;
    fn output(&self) -> TreeKind;
    fn run<'a>(
        &self,
        tree: Tree<'a>,
        file: &mut File,
        alloc: &'a Allocator,
    ) -> Result<Tree<'a>, Error>;

    // Provided methods
    fn start<'a>(
        &self,
        tree: Tree<'a>,
        file: &mut File,
        alloc: &'a Allocator,
    ) -> Result<Step<'a>, Error> { ... }
    fn host(&self) -> Option<u32> { ... }
    fn html_writer(&self, _target: HtmlTarget) -> Option<Box<dyn HtmlWriter>> { ... }
}

Changes a tree, or bridges it into another kind of tree.

Required Methods

fn input(&self) -> TreeKind

fn output(&self) -> TreeKind

fn run<'a>( &self, tree: Tree<'a>, file: &mut File, alloc: &'a Allocator, ) -> Result<Tree<'a>, Error>

Provided Methods

fn start<'a>( &self, tree: Tree<'a>, file: &mut File, alloc: &'a Allocator, ) -> Result<Step<'a>, Error>

Start the stage: a finished tree, or a job when its work is asynchronous.

fn host(&self) -> Option<u32>

The id of the binding function this stage stands for, which takes and returns whatever tree reaches it; None for a stage the crate runs.

fn html_writer(&self, _target: HtmlTarget) -> Option<Box<dyn HtmlWriter>>

Something that writes, from this stage’s input, the HTML a compiler aiming at target would write from its output, when the stage can skip building that tree.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors