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Generic Normalize impl for arithmetic and npos-elections (#6374)

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* add normalize

* better api for normalize

* Some grumbles

* Update primitives/arithmetic/src/lib.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* More great review grumbles

* Way better doc for everything.

* Some improvement

* Update primitives/arithmetic/src/lib.rs

Co-authored-by: Bernhard Schuster <bernhard@ahoi.io>

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: Bernhard Schuster <bernhard@ahoi.io>
This commit is contained in:
Kian Paimani
2020-06-24 15:32:50 +02:00
committed by GitHub
parent b14b472edf
commit e016a49322
15 changed files with 809 additions and 246 deletions
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substrate/primitives/arithmetic/src/per_things.rs
+8 -3
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@@ -21,24 +21,29 @@ use serde::{Serialize, Deserialize};
use sp_std::{ops, fmt, prelude::*, convert::TryInto};
use codec::{Encode, CompactAs};
use crate::traits::{
SaturatedConversion, UniqueSaturatedInto, Saturating, BaseArithmetic, Bounded, Zero,
SaturatedConversion, UniqueSaturatedInto, Saturating, BaseArithmetic, Bounded, Zero, Unsigned,
};
use sp_debug_derive::RuntimeDebug;
/// Get the inner type of a `PerThing`.
pub type InnerOf<P> = <P as PerThing>::Inner;
/// Get the upper type of a `PerThing`.
pub type UpperOf<P> = <P as PerThing>::Upper;
/// Something that implements a fixed point ration with an arbitrary granularity `X`, as _parts per
/// `X`_.
pub trait PerThing:
Sized + Saturating + Copy + Default + Eq + PartialEq + Ord + PartialOrd + Bounded + fmt::Debug
{
/// The data type used to build this per-thingy.
type Inner: BaseArithmetic + Copy + fmt::Debug;
type Inner: BaseArithmetic + Unsigned + Copy + fmt::Debug;
/// A data type larger than `Self::Inner`, used to avoid overflow in some computations.
/// It must be able to compute `ACCURACY^2`.
type Upper: BaseArithmetic + Copy + From<Self::Inner> + TryInto<Self::Inner> + fmt::Debug;
type Upper:
BaseArithmetic + Copy + From<Self::Inner> + TryInto<Self::Inner> +
UniqueSaturatedInto<Self::Inner> + Unsigned + fmt::Debug;
/// The accuracy of this type.
const ACCURACY: Self::Inner;