Derive Macro concordium_std::Deletable
source · #[derive(Deletable)]
{
// Attributes available to this derive:
#[concordium]
}
Expand description
Derive the Deletable trait.
See the documentation of
derive(Deletable)
for details and limitations.
The trait should be derived for types which have not implemented the
Serialize
trait. That is, Deletable should be derived for types with a
non-trivial state.
Non-trivial state here means when you have a type MyState
which has one or
more fields comprised of
StateBox
,
StateSet
, or
StateMap
.
Please note that it is
necessary to specify the generic parameter name for the
HasStateApi
generic parameter.
To do so, use the #[concordium(state_parameter = "NameOfGenericParameter")]
attribute on the type you are deriving
Deletable
for.
Example
ⓘ
#[derive(Serial, DeserialWithState, Deletable)]
#[concordium(state_parameter = "S")]
struct MyState<S> {
my_state_map: StateMap<SomeType, SomeOtherType, S>,
}