Ruby阻止参数名称(Ruby blocks parameter names)

Ruby阻止参数名称(Ruby blocks parameter names)

有谁知道是否有一种方法来访问在红宝石块传递参数的名称？

例如

def do_something() # method uses the names of the parameters passed to the block # in addition to their values # e.g. the strings "i" and "j" end do_something { |i, j| ... }

这是我写作的dsl的一个要求，也是一个不寻常的用例。 这可能是像parsetree这样的东西，我只是想知道是否有一个更简单/更贴心的方式。

谢谢

Does anyone know if there is a way to access the names of the parameters passed in ruby blocks?

E.g.

def do_something() # method uses the names of the parameters passed to the block # in addition to their values # e.g. the strings "i" and "j" end do_something { |i, j| ... }

It's a requirement for a dsl I'm writing, and quite an unusual use case. This is probably possible with something like parsetree, I just wondered if there was an easier/cheekier way.

Thanks

最满意答案

这实际上是可能的，但仅限于1.9的主干版本：

->(a,b,c) {}.parameters

它不会被发布，并且很可能会被包含在Ruby 1.9.2中。

This is actually possible, but only in the trunk version of 1.9:

->(a,b,c) {}.parameters

It is not released though and will most probably be included in Ruby 1.9.2.