pub trait ArbitraryF2<A: Debug, B: Debug>: Debug + Sized {
type Parameters: Default;
// Required method
fn lift2_with<AS, BS>(
fst: AS,
snd: BS,
args: Self::Parameters,
) -> BoxedStrategy<Self>
where AS: Strategy<Value = A> + 'static,
BS: Strategy<Value = B> + 'static;
// Provided method
fn lift2<AS, BS>(fst: AS, snd: BS) -> BoxedStrategy<Self>
where AS: Strategy<Value = A> + 'static,
BS: Strategy<Value = B> + 'static { ... }
}Expand description
ArbitraryF2 lets you lift Strategy to binary
type constructors such as Result, HashMap.
The trait corresponds to
Haskell QuickCheck’s Arbitrary2 type class.
Required Associated Types§
Sourcetype Parameters: Default
type Parameters: Default
The type of parameters that lift2_with accepts for
configuration of the lifted and generated Strategy. Parameters
must implement Default.
Required Methods§
Sourcefn lift2_with<AS, BS>(
fst: AS,
snd: BS,
args: Self::Parameters,
) -> BoxedStrategy<Self>
fn lift2_with<AS, BS>( fst: AS, snd: BS, args: Self::Parameters, ) -> BoxedStrategy<Self>
Lifts two given strategies to a new Strategy for the (presumably)
bigger type. This is useful for lifting a Strategy for Type1
and one for Type2 to a container such as HashMap<Type1, Type2>.
The composite strategy is passed the arguments given in args.
If you wish to use the default() arguments,
use lift2 instead.
Provided Methods§
Sourcefn lift2<AS, BS>(fst: AS, snd: BS) -> BoxedStrategy<Self>
fn lift2<AS, BS>(fst: AS, snd: BS) -> BoxedStrategy<Self>
Lifts two given strategies to a new Strategy for the (presumably)
bigger type. This is useful for lifting a Strategy for Type1
and one for Type2 to a container such as HashMap<Type1, Type2>.
Calling this for the type X is the equivalent of using
X::lift2_with(base, Default::default()).
This method is defined in the trait for optimization for the default if you want to do that. It is a logic error to not preserve the semantics when overriding.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.