Interception method_added for blocks


#1

hi,

is it possible to somehow intercept method_added
for defs defined within a block?

y = Proc.new {
def x
end
}

for example in the code above who gets notfied of the existance of x?

ciao robertj


#2

class << Proc
alias_method :_new, :new
def new( *args, &blk )
puts “Intercept…”
_new( *args, &blk )
end
end

You can’t do it with method_added becuase it is a post hook --the
method has already been created.


#3

Ah misread that a bit. The code won’t help, so ignore that.

Actual answer: It depends on where you evaluate the code.

irb(main):001:0> class A
irb(main):002:1> def self.method_added( sym )
irb(main):003:2> p “A##{sym}”
irb(main):004:2> end
irb(main):005:1> end
=> nil
irb(main):006:0> class B
irb(main):007:1> def self.method_added( sym )
irb(main):008:2> p “B##{sym}”
irb(main):009:2> end
irb(main):010:1> end
=> nil
irb(main):011:0> d = Proc.new{ def x; end }
=> #Proc:0xb79d553c@:11(irb)
irb(main):012:0> A.class_eval &d
“A#x”
=> nil
irb(main):013:0> B.class_eval &d
“B#x”
=> nil