weft 0.1.2

HTML templating with composability in mind
Documentation 
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//! Extensions and helpers for use within templates and renderers.
use crate::template::{RenderTarget, WeftRenderable};
use std::{fmt, io};

/// A helper struct for the `Displayable` trait.
pub struct Displayer<'a, D>(&'a D);

/// A mechanism to render a value that implements `fmt::Display` in templates.
pub trait Displayable: Sized {
    /// Extension method for types that implement fmt::Display
    fn display(&self) -> Displayer<'_, Self>;
}

impl<D: fmt::Display> Displayable for D {
    fn display(&self) -> Displayer<'_, D> {
        Displayer(self)
    }
}

impl<'a> WeftRenderable for &'a str {
    fn render_to(&self, target: &mut impl RenderTarget) -> Result<(), io::Error> {
        target.text(self)
    }
}

impl WeftRenderable for String {
    fn render_to(&self, target: &mut impl RenderTarget) -> Result<(), io::Error> {
        target.text(self)
    }
}

impl<'a, D: fmt::Display> WeftRenderable for Displayer<'a, D> {
    fn render_to(&self, target: &mut impl RenderTarget) -> Result<(), io::Error> {
        target.text(&self.to_string())
    }
}

impl<'a, D: fmt::Display> ToString for Displayer<'a, D> {
    fn to_string(&self) -> String {
        format!("{}", self.0)
    }
}