Trait proptest::arbitrary::functor::ArbitraryF2

source · 
pub trait ArbitraryF2<A: Debug, B: Debug>: Debug + Sized {
    type Parameters: Default;

    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;

    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§

The type of parameters that lift2_with accepts for configuration of the lifted and generated Strategy. Parameters must implement Default.

Required Methods§

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§

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.

Implementations on Foreign Types§

Implementors§