nushell/src/traits.rs
2019-09-14 11:30:24 -05:00

28 lines
595 B
Rust

use crate::prelude::*;
use std::fmt;
pub struct Debuggable<'a, T: ToDebug> {
inner: &'a T,
source: &'a str,
}
impl<T: ToDebug> fmt::Display for Debuggable<'_, T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.inner.fmt_debug(f, self.source)
}
}
pub trait HasTag {
fn tag(&self) -> Tag;
}
pub trait ToDebug: Sized {
fn debug<'a>(&'a self, source: &'a str) -> Debuggable<'a, Self> {
Debuggable {
inner: self,
source,
}
}
fn fmt_debug(&self, f: &mut fmt::Formatter, source: &str) -> fmt::Result;
}