什么是"咕哝打字" [英] What is "mumble typing?"

问题描述

我见过几个提到的咕哝打字，像这样的StackOverflow的答案：的请问.NET支持的元组在C＃的未来版本？

I've seen several mentions of "mumble typing," such as this StackOverflow answer: Will a future version of .NET support tuples in C#?

我用Google搜索这个词和我再也找不到比一些人希望C＃最终会支持它更在解释的方式，其他。

I Googled the term and I couldn't find much in the way of an explanation, other than some people hoping that C# would eventually support it.

什么是喃喃打字？

推荐答案

我不知道是否有人在C＃设计团队想出了这个词，或者如果它在行业中的其他位置使用。我们开始使用它，而工作的隐式类型的局部变量（即变种X =什么;）用C＃3.0。一个相当常见的场景是希望编译器来推断一个类型的一部分​​，但更加明确一些，另一部分。例如，请考虑以下内容：

I don't know if someone on the C# design team came up with this term, or if it is used elsewhere in the industry. We started using it while working on implicitly typed local variables (that is "var x = whatever;") in C# 3.0. A fairly common scenario is to want the compiler to infer part of a type but be explicit about another part. For example, consider the following:

var list = new List<int>() { 10, 20, 30 };

下面的名单的类型没有给出，但泛型列表的类型参数给出。很多人认为，这可能从初始推断：

Here the type of "list" is not given, but the type argument of the generic list is given. One imagines that this could be inferred from the initializer:

var list = new List<???>() { 10, 20, 30 };

在这里？意思是有这么放在这里一个类型参数，编译器，找出它必须从上下文。

Here the ??? means "there's a type argument that goes here; compiler, figure out what it has to be from the context".

我们称之为嗯嗯打字，因为一个幽默地想象正在读取的代码为VAR名单等于十，二十，三十初始化hrmhmrhrm的新名单。

We call this "mumble typing" because one humourously imagines the code being read as "var list equals new list of hrmhmrhrm initialized with ten, twenty, thirty."

我们从未付诸实施咕哝打字，这是一个有点不幸的，因为它意味着它是很难使匿名类型的列表。要做到这一点，你可以使用的投举例的把戏。

We never implemented mumble typing, which is a bit unfortunate because it means that it is hard to make a list of anonymous type. To do so, you can use the "cast by example" trick.

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