例句與造句

1. However, type inference for existential types is a difficult problem.
2. Languages that support existential types make use of existentially quantified type variables.
3. Since wildcards are a form of existential types they can be used for more things than just variance.
4. In general it's impossible for the typechecker to infer which existential type a given module belongs to.
5. This similarity stems from the fact that both notions rely on the same mathematical fundamental of an existential type.
6. It's difficult to find existential type in a sentence. 用existential type造句挺難的
7. This gives flexibility for choosing types suited to a particular implementation while clients that use only values of the interface type & mdash; the existential type & mdash; are isolated from these choices.
8. Later versions of Scala added Java-style existential types and wildcards; however, according to Martin Odersky, if there were no need for interoperability with Java then these would probably not have been included.
9. Although abstract data types and modules had been implemented in programming languages for quite some time, it wasn't until 1988 that John C . Mitchell and Gordon Plotkin established the formal theory under the slogan : " Abstract [ data ] types have existential type ".
10. These types are both subtypes of the more general existential type T and correspond to concrete implementation types, so any value of one of these types is a value of type T . Given a value " t " of type " T ", we know that " t . f ( t . a ) " is well-typed, regardless of what the abstract type " X " is.