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drew.tupletimestamp - Add tuple macro for timestamps too, break macro out into support (#1372)

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* Add tuple and dont mess up spacing

* Update lib.rs

* Add timestamp tuple macro
:

* Tabs

* Add docs.
This commit is contained in:
Drew Stone
2019-01-09 13:18:09 +02:00
committed by Gav Wood
parent 079eb39559
commit 43269f0dbc
3 changed files with 31 additions and 21 deletions
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substrate/srml/timestamp/src/lib.rs
+15 -9
View File
@@ -55,25 +55,31 @@ use runtime_primitives::traits::{
};
use system::ensure_inherent;
use rstd::{result, ops::{Mul, Div}, vec::Vec};
use runtime_support::for_each_tuple;
/// A trait which is called when the timestamp is set.
pub trait OnTimestampSet<Moment> {
fn on_timestamp_set(moment: Moment);
}
impl<Moment> OnTimestampSet<Moment> for () {
fn on_timestamp_set(_moment: Moment) { }
}
macro_rules! impl_timestamp_set {
() => (
impl<Moment> OnTimestampSet<Moment> for () {
fn on_timestamp_set(_: Moment) {}
}
);
impl<A, B, Moment: Clone> OnTimestampSet<Moment> for (A, B)
where A: OnTimestampSet<Moment>, B: OnTimestampSet<Moment>
{
fn on_timestamp_set(moment: Moment) {
A::on_timestamp_set(moment.clone());
B::on_timestamp_set(moment);
( $($t:ident)* ) => {
impl<Moment: Clone, $($t: OnTimestampSet<Moment>),*> OnTimestampSet<Moment> for ($($t,)*) {
fn on_timestamp_set(moment: Moment) {
$($t::on_timestamp_set(moment.clone());)*
}
}
}
}
for_each_tuple!(impl_timestamp_set);
pub trait Trait: consensus::Trait + system::Trait {
/// The position of the required timestamp-set extrinsic.
const TIMESTAMP_SET_POSITION: u32;