Constant lookup


#1

I’ve come across an odd issue when using a constant that is defined
within more than one module namespace. I’ve searched this
forum/ml/newsgroup for some answers, but I didn’t come across anything
that quite addressed the situation I’m seeing.

Can anyone explain why this occurs? Is it supposed to? It doesn’t make a
ton of sense to me.

module Z
class A
def initialize
puts “Z::A”
end
end
module Y
module X
class A
def initialize
puts “Z::Y::x::A”
end
end
end
class B
include X
def initialize
puts “Z::Y::B”
@a = A.new
end
end
end
end

Z::A.new
Z::A
=> #<Z::a:0x573dc>

Z::Y::x::A.new
Z::Y::x::A
=> #<Z::Y::x::a:0x5030c>

Z::Y::B.new
Z::Y::B
Z::A
=> #<Z::Y::b:0x48e18 @a=#<Z::a:0x48dc8>>

Z::Y::B.const_get(“A”)
=> Z::Y::x::A

module Z
module Y
class B
const_get(“A”)
end
end
end
=> Z::Y::x::A

module Z
module Y
class B
A
end
end
end
=> Z::A

It seems to me, though obviously I’m wrong, that the bare constant ‘A’
should evaluate to exactly the same thing as self.const_get(“A”).

In the mean time, I’ll just rename my constants to non-conflicting
names, but… why is this working this way in the first place?