另一个示例：通用类型推断。

Another example: Generic type inference.

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类型推断——包括精确和推测两种方式。

Type inference-both exact and speculative.

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即使使用类型推断，还是需要多余的类型信息。

Even with type inference, redundant type information is needed.

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怎么是这个函数的类型推断？

How is the type of this function inferred?

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其中一些，比如已经讨论过的类型推断，可以随意使用。

Some of these, such as type inference, as discussed, come for free.

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返回类型是推断出的，我们会看到，这会是一个潜在的问题所在。

The return type is inferred, which is a potential problem, as we will see.

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编译器应该为底部赋值中的T推断什么类型？

What type should the compiler infer for T in the assignment at the bottom?

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注意，String类型是被推断出来的。

Note that the String type is inferred for us, too.

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也可以省略类型参数，编译器将推断出该参数。

You can also omit the type argument and the compiler will infer it.

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也可以省略类型参数，编译器将推断出该参数。

You can also omit the type argument and the compiler will infer it.

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