Forum: Ruby-dev [ruby-trunk - Bug #6241][Assigned] Module#method_defined? with inherited flag

Issue #6241 has been reported by nobu (Nobuyoshi Nakada).

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Bug #6241: Module#method_defined? with inherited flag
https://bugs.ruby-lang.org/issues/6241

Author: nobu (Nobuyoshi Nakada)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: 2.0.0
ruby -v: 35201


=begin
Currently (({Module#method_defined?})) does not accept "(({inherited}))" 
flags as (({Module#instance_methods})) and others.
To tell if a method is defined at an exact class/module, we have to use 
bad idiom:

  mod.instance_methods(false).include?(:foo)

So I propose to let (({method_defined?})) and etc accept the flag.
=end

Issue #6241 has been updated by trans (Thomas Sawyer).


I think this is certainly a good idea. But I want to also point out that 
it's not always ideal either b/c #method_defined? reports false for 
private/protected methods. So in cases where the method in question 
might have known visibility one would have to do:

    if method_defined?(:foo) or private_method_defined?(:foo) or 
protected_method_defined?(:foo)

which sucks. Of course, this has always been an issue with 
#instance_methods too.

Perhaps now that named parameters are coming into their own, the 
interface should be modified to handle options?

    method_defined?(:foo, all: true, inherited: false)


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Feature #6241: Module#method_defined? with inherited flag
https://bugs.ruby-lang.org/issues/6241#change-25575

Author: nobu (Nobuyoshi Nakada)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: 2.0.0


=begin
Currently (({Module#method_defined?})) does not accept "(({inherited}))" 
flags as (({Module#instance_methods})) and others.
To tell if a method is defined at an exact class/module, we have to use 
bad idiom:

  mod.instance_methods(false).include?(:foo)

So I propose to let (({method_defined?})) and etc accept the flag.
=end

Issue #6241 has been updated by matz (Yukihiro Matsumoto).

Status changed from Assigned to Rejected
Target version changed from 2.0.0 to next minor

Tomas has a point. We cannot accept the original idea.
So I reject this proposal. Try again.

In general I am not a big fun of inherited flag, since most inheritance 
works rather as composition in Ruby.

Matz.

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Feature #6241: Module#method_defined? with inherited flag
https://bugs.ruby-lang.org/issues/6241#change-32034

Author: nobu (Nobuyoshi Nakada)
Status: Rejected
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: next minor


=begin
Currently (({Module#method_defined?})) does not accept "(({inherited}))" 
flags as (({Module#instance_methods})) and others.
To tell if a method is defined at an exact class/module, we have to use 
bad idiom:

  mod.instance_methods(false).include?(:foo)

So I propose to let (({method_defined?})) and etc accept the flag.
=end