Define method hook

Ruby
1

Is there a way to intercept method defines, so that i can setup a
callback whenever a new method is defined for a class? I’m looking
for something that works with the def keyword, and doesn’t require
any extensions.

-Ben

2

On 9/14/07, Ben B. [email protected] wrote:

Is there a way to intercept method defines, so that i can setup a
callback whenever a new method is defined for a class? I’m looking
for something that works with the def keyword, and doesn’t require
any extensions.

Yep. Module#method_added
If you do this:

class Example
def self.method_added(meth)
p meth
end
end

After that, this code:
class Example;def foo(baz);5;end;end

…will print out: :foo

3

Is there a way to intercept method defines, so that i can setup a
callback whenever a new method is defined for a class?

class Module
def method_added(method_name)
p [caller[0], self, method_name]
end
end

class Foo
def bar
end
end

gegroet,
Erik V.

4

great, thanks.