scala - 在 Scala 中 => 是什么？

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我知道 =>在 Scala 中用于函数字面量，意思是“将左边的东西转换成右边的东西”。但是这个符号实际上叫什么？等于，暗示，lambda？什么？

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我记得在某处读过“火箭”这个词，可能是在书 Programming Scala 中。作者:Dean Wampler 和 Alex Payne。我找到了 this related answer from Bill Venners on a forum :

I asked Martin Odersky a while back what he called this, and he said "right arrow". Ron Hitchens suggested the name "bullet" to me a couple months ago. I used that here and there, but it didn't seem to stick. About 2 weeks ago I asked some Ruby guys what they call it, and they said "hash rocket". The reason for "hash" is Ruby uses it for mapping keys to value, i.e., "key => value" in Ruby is like "key -> value" in Scala (but untyped in Ruby), and of course -> in Scala is a library abstraction, not part of the language.

So I suggest we call it "rocket". It's more exciting and less violent than bullet, and we can put an adjective in there to differentiate the various uses in Scala: there's "function rocket" in anonymous functions, maybe a "case rocket" in a case clause in match expression or partial function, etc.

所以奥德斯基使用的“官方”术语是“右箭头”。