Rename: primitives/sr-std -> primitives/sp-std (#4327)

* primitives/sr-std -> primitives/std

* fix

* fix conflict

* rstd -> sp-std

* git mv

* fix review

* fix merge

substrate/frame/staking/src/lib.rs

@@ -255,7 +255,7 @@ mod slashing;
 
 pub mod inflation;
 
-use rstd::{prelude::*, result};
+use sp_std::{prelude::*, result};
 use codec::{HasCompact, Encode, Decode};
 use support::{
 	decl_module, decl_event, decl_storage, ensure,
@@ -445,7 +445,7 @@ impl<AccountId, Balance> StakingLedger<AccountId, Balance> where
 				// don't leave a dust balance in the staking system.
 				if *target <= minimum_balance {
 					slash_from_target += *target;
-					*value += rstd::mem::replace(target, Zero::zero());
+					*value += sp_std::mem::replace(target, Zero::zero());
 				}
 
 				*total_remaining = total_remaining.saturating_sub(slash_from_target);
@@ -1304,7 +1304,7 @@ impl<T: Trait> Module<T> {
 		let points = CurrentEraPointsEarned::take();
 		let now = T::Time::now();
 		let previous_era_start = <CurrentEraStart<T>>::mutate(|v| {
-			rstd::mem::replace(v, now)
+			sp_std::mem::replace(v, now)
 		});
 		let era_duration = now - previous_era_start;
 		if !era_duration.is_zero() {
@@ -1641,7 +1641,7 @@ impl<T: Trait + authorship::Trait> authorship::EventHandler<T::AccountId, T::Blo
 
 /// A `Convert` implementation that finds the stash of the given controller account,
 /// if any.
-pub struct StashOf<T>(rstd::marker::PhantomData<T>);
+pub struct StashOf<T>(sp_std::marker::PhantomData<T>);
 
 impl<T: Trait> Convert<T::AccountId, Option<T::AccountId>> for StashOf<T> {
 	fn convert(controller: T::AccountId) -> Option<T::AccountId> {
@@ -1651,7 +1651,7 @@ impl<T: Trait> Convert<T::AccountId, Option<T::AccountId>> for StashOf<T> {
 
 /// A typed conversion from stash account ID to the current exposure of nominators
 /// on that account.
-pub struct ExposureOf<T>(rstd::marker::PhantomData<T>);
+pub struct ExposureOf<T>(sp_std::marker::PhantomData<T>);
 
 impl<T: Trait> Convert<T::AccountId, Option<Exposure<T::AccountId, BalanceOf<T>>>>
 	for ExposureOf<T>
@@ -1751,7 +1751,7 @@ impl <T: Trait> OnOffenceHandler<T::AccountId, session::historical::Identificati
 
 /// Filter historical offences out and only allow those from the bonding period.
 pub struct FilterHistoricalOffences<T, R> {
-	_inner: rstd::marker::PhantomData<(T, R)>,
+	_inner: sp_std::marker::PhantomData<(T, R)>,
 }
 
 impl<T, Reporter, Offender, R, O> ReportOffence<Reporter, Offender, O>

substrate/frame/staking/src/migration.rs

@@ -26,7 +26,7 @@ pub const CURRENT_VERSION: VersionNumber = 1;
 mod inner {
 	use crate::{Store, Module, Trait};
 	use support::{StorageLinkedMap, StorageValue};
-	use rstd::vec::Vec;
+	use sp_std::vec::Vec;
 	use super::{CURRENT_VERSION, VersionNumber};
 
 	// the minimum supported version of the migration logic.

substrate/frame/staking/src/slashing.rs

@@ -57,7 +57,7 @@ use support::{
 	StorageMap, StorageDoubleMap,
 	traits::{Currency, OnUnbalanced, Imbalance},
 };
-use rstd::vec::Vec;
+use sp_std::vec::Vec;
 use codec::{Encode, Decode};
 
 /// The proportion of the slashing reward to be paid out on the first slashing detection.
@@ -133,7 +133,7 @@ impl SlashingSpans {
 			SlashingSpan { index, start, length: Some(length) }
 		});
 
-		rstd::iter::once(last).chain(prior)
+		sp_std::iter::once(last).chain(prior)
 	}
 
 	/// Yields the era index where the last (current) slashing span started.
@@ -161,7 +161,7 @@ impl SlashingSpans {
 		};
 
 		// readjust the ongoing span, if it started before the beginning of the window.
-		self.last_start = rstd::cmp::max(self.last_start, window_start);
+		self.last_start = sp_std::cmp::max(self.last_start, window_start);
 		pruned
 	}
 }
@@ -419,7 +419,7 @@ struct InspectingSpans<'a, T: Trait + 'a> {
 	paid_out: &'a mut BalanceOf<T>,
 	slash_of: &'a mut BalanceOf<T>,
 	reward_proportion: Perbill,
-	_marker: rstd::marker::PhantomData<T>,
+	_marker: sp_std::marker::PhantomData<T>,
 }
 
 // fetches the slashing spans record for a stash account, initializing it if necessary.
@@ -444,7 +444,7 @@ fn fetch_spans<'a, T: Trait + 'a>(
 		slash_of,
 		paid_out,
 		reward_proportion,
-		_marker: rstd::marker::PhantomData,
+		_marker: sp_std::marker::PhantomData,
 	}
 }