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Make decl_event! more ergonomic (#723)

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* Improve and simplify `decl_event!`

- RawEvent is not required anymore to be written in the defintion
- Events with and without parameters are now supported everywhere

* Make `decl_event!` more flexible with the automatic naming of generic parameters

The macro will now automatically derive the name of a generic parameter
from the trait type name, if no explicit name is given.

`where Balance = <T as Trait>::Balance` can be simplified to
`where <T as Trait>::Balance`.

* Adapts to latest refactoring changes
This commit is contained in:
Bastian Köcher
2018-09-12 16:02:59 +02:00
committed by Gav Wood
parent 4685018991
commit c5c5b35da3
11 changed files with 236 additions and 95 deletions
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substrate/srml/balances/src/lib.rs
+5 -2
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@@ -136,8 +136,11 @@ decl_module! {
}
decl_event!(
pub enum Event<T> with RawEvent<AccountId, AccountIndex, Balance>
where <T as system::Trait>::AccountId, <T as Trait>::AccountIndex, <T as Trait>::Balance {
pub enum Event<T> where
<T as system::Trait>::AccountId,
<T as Trait>::AccountIndex,
<T as Trait>::Balance
{
/// A new account was created.
NewAccount(AccountId, AccountIndex, NewAccountOutcome),
/// An account was reaped.