Type Definition proptest_arbitrary::StrategyType
[−]
[src]
type StrategyType<'a, A> = <A as Arbitrary<'a>>::Strategy;
StrategyType
allows you to mention the type of Strategy
for the
input type A
without directly using associated types or without resorting
to existential types. This way, if implementation of Arbitrary
changes,
your tests should not break. This can be especially beneficial when the
type of Strategy
that you are dealing with is very long in name
(the case with generics). Additionally, if you have a custom Strategy
type, or use a Strategy
type with generics in it where you've provided
a custom type for the type parameter, you need not export your type if A
is Arbitrary
as the Strategy
type is still reachable from StrategyType
.
Unless the strategy uses lifetimes in the type, you most likely want
StrategyFor<A>
instead.