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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/session/src/lib.rs
+1 -3
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@@ -84,9 +84,7 @@ decl_module! {
/// An event in this module.
decl_event!(
pub enum Event<T> with RawEvent<BlockNumber>
where <T as system::Trait>::BlockNumber
{
pub enum Event<T> where <T as system::Trait>::BlockNumber {
/// New session has happened. Note that the argument is the session index, not the block
/// number as the type might suggest.
NewSession(BlockNumber),