Attribute Macro persian_rug_derive::contextual
source ยท #[contextual]
Expand description
Provide a implementation of Contextual
for a type.
This is a very simple derive-style macro, that creates an
impl for Contextual
for the type it annotates. It takes
one argument, which is the Context
type that this
type belongs to.
Example:
use persian_rug::{contextual, Context};
#[contextual(C)]
struct Foo<C: Context> {
_marker: core::marker::PhantomData<C>
}
which is equivalent to the following:
use persian_rug::{Context, Contextual};
struct Foo<C: Context> {
_marker: core::marker::PhantomData<C>
}
impl<C: Context> Contextual for Foo<C> {
type Context = C;
}