Why NameError?

Ruby
1

module M1
class A
end
end

module M2
class A
end
p A # M2::A
class B
p A # M2::A
end
end

module M3
include M1
p A # M1::A
class B
p A # NameError (M3::b::A)
end
end

##############

Help Me^^

##############

2

it seems that the interpreter search for a ‘A’ class nested inside B …
I
don’t know why…

3

Hi,

In message “Re: Why NameError ??”
on Mon, 25 Aug 2008 17:54:00 +0900, Kyung won Cheon
[email protected] writes:

|module M1
| class A
| end
|end
|
|module M2
| class A
| end
| p A # M2::A
| class B
| p A # M2::A
| end
|end
|
|module M3
| include M1
| p A # M1::A
| class B
| p A # NameError (M3::b::A)
| end
|end

Constant look-up goes self → surrounding → super (until Object).
So, from M3, look-up goes M3 → M1 (A defined here). From M3::B,
B → M3 → Object (no A found).

          matz.
4

On Mon, Aug 25, 2008 at 10:54 AM, Kyung won Cheon
[email protected] wrote:
constants are not included, only methods
HTH
Robert

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