From 2f35d7f003f571ef1a7c496e061e32d0c9091d9b Mon Sep 17 00:00:00 2001
From: thiolliere <gui.thiolliere@gmail.com>
Date: Thu, 28 Nov 2019 11:06:06 +0100
Subject: [PATCH] improve doc (#4239)
---
substrate/frame/support/src/dispatch.rs | 3 +++
1 file changed, 3 insertions(+)
diff --git a/substrate/frame/support/src/dispatch.rs b/substrate/frame/support/src/dispatch.rs
index cde1300831d..3c41326b155 100644
--- a/substrate/frame/support/src/dispatch.rs
+++ b/substrate/frame/support/src/dispatch.rs
@@ -48,6 +48,9 @@ pub trait Callable<T> {
// https://github.com/rust-lang/rust/issues/51331
pub type CallableCallFor<A, T> = <A as Callable<T>>::Call;
+/// A type that can be used as a parameter in a dispatchable function.
+///
+/// When using `decl_module` all arguments for call functions must implement this trait.
pub trait Parameter: Codec + EncodeLike + Clone + Eq + fmt::Debug {}
impl<T> Parameter for T where T: Codec + EncodeLike + Clone + Eq + fmt::Debug {}
--
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