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use std::io::Write;

macro_rules! render {
    ($template:path) => (Render(|o| $template(o)));
    ($template:path, $($arg:expr),*) => {{
        use self::actix_ructe::Render;
        Render(|o| $template(o, $($arg),*))
    }};
    ($template:path, $($arg:expr),* ,) => {{
        use self::actix_ructe::Render;
        Render(|o| $template(o, $($arg),*))
    }};
}

pub struct Render<T: FnOnce(&mut dyn Write) -> std::io::Result<()>>(pub T);

impl<T: FnOnce(&mut dyn Write) -> std::io::Result<()>> From<Render<T>>
for actix_web::body::Body
{
  fn from(t: Render<T>) -> Self {
    let mut buf = Vec::new();
    match t.0(&mut buf) {
      Ok(()) => buf.into(),
      Err(_e) => { 
        //log::warn!("Failed to render: {}", e);
        "Render failed".into()
      }
    }
  }
}