Conditional class extension

[Trans]

Is there a better way to do conditional class extension?

module Foo
if const_getBar)
class Bar
def x; end
end
end recue nil
end

The 'if const_get ... rescue nil' doesn't seem very elegant.

Thanks,
T.

 

[Joel VanderWerf]

Is there a better way to do conditional class extension?

module Foo
if const_getBar)

if defined? Bar

That works if you are referring literally to Bar, but not if you just
have a variable referring to a string that might or might not be defined
as a constant in Foo. In that case, you could use constants.include?(str).

 

[Florian Frank]

Is there a better way to do conditional class extension?

module Foo
if const_getBar)
class Bar
def x; end
end
end recue nil
end

The 'if const_get ... rescue nil' doesn't seem very elegant.

if defined? Foo::Bar
# ...
end

 

[Ross Bamford]

Is there a better way to do conditional class extension?

module Foo
if const_getBar)
class Bar
def x; end
end
end recue nil
end

The 'if const_get ... rescue nil' doesn't seem very elegant.

Just a small change, but why not just ask if const_defined? ?

 

[Trans]

Just a small change, but why not just ask if const_defined? ?

Oh yea!

Thanks,
T.