type-inference

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Code that exercises type inference

I\'m working on an experimental programming language that has global polymorphic type inference. I recently got the algorithm working sufficiently well to correctly type the bits of sample code I\'m[详细]

2023-01-10 23:52 分类：问答
Type inference question using Scalaz.ListW.<^>

I was p开发者_C百科laying around with ListW.<^>, the definition of which is as follows: def <^>[B: Zero](f: NonEmptyList[A] => B): B = value match {[详细]

2023-01-09 09:12 分类：问答
Under what conditions is inferring Nothing desirable?

In my own code, and on numerous mailing list postings, I\'ve notic开发者_JS百科ed confusion due to Nothing being inferred as the least upper bound of two other types.[详细]

2023-01-08 12:56 分类：问答
Why does Scala type inference fail here?

I have this class in Scala: object Util { class Tapper[A](tapMe: A) { def tap(f: A => Unit): A = { f(tapMe)[详细]

2023-01-08 07:12 分类：问答
In C#, how do inferred variables using var behave with respect to memory and lifecycle?

Ok, I\'ve been reading everything I can find on var, and I\'m pretty sure I\'ve got a handle on their basic behaviors and type inference. I\'ve always been a big proponent of explicit types, so var ma[详细]

2023-01-07 07:13 分类：问答
Why this is not throwing any type error?

I was trying some code segment from one of the blog and I came to no开发者_开发知识库tice the following code[详细]

2023-01-06 13:00 分类：问答
Designing a convenient default valued map in Scala

I find myself using a lot of nested maps, e.g a Map[Int, Map[String, Set[String]]], and I\'d like to have new Maps, Sets, etc. created automatically when I access a new key. E.g. something like the fo[详细]

2023-01-06 08:58 分类：问答
Java Generics Class Parameter Type Inference

Given the interface: public interface BasedOnOther<T, U extends BasedList<T>> { public T getOther();[详细]

2023-01-04 04:45 分类：问答
Why does using Collections.emptySet() with generics work in assignment but not as a method parameter?

So, I have a class with a constructor like this: public FilterList(Set<Integer> labels) { ... } and I want to construct a new FilterList object with an empty set. Following Joshua Bloch\'s ad[详细]

2023-01-04 00:22 分类：问答
Why generic type inference doesn't work in that case?

When trying to compile the following code in LINQPad : void Main() { DriveInfo.GetDrives().Select(GetProviderName).Dump();[详细]

2022-12-31 22:21 分类：问答