Feature #10720: A proposal for something like: attr_reader :foo? - with the trailing '?' question mark

• Status: Rejected
• Assignee: -
• Target version: -

[shevegen (Robert A. Heiler)]

Hi guys,

Sorry to burden you with another suggestion, no problem
if it is not accepted, I wanted to just make it. :-)

We have a way to define reader methods easily, such
as in:

attr_reader :foo

This should be equivalent to:

def foo
  @foo
end

I love query methods ending with ?, so I often also use
something like:

def foo?
  @foo
end

What if there is a programmatic way to define these?

For instance, like:

attr_reader? :foo

This might lead to confusion perhaps, so a way such as:

attr_question :foo

or

attr_query :foo

or perhaps even better

attr_reader :foo?

The latter variant does not work:

foo.rb:20:in `attr_reader': invalid attribute name `foo?' (NameError)

Perhaps :foo? could query the instance variable @foo
instead here? Currently attr_reader :foo? is invalid
but :foo? is a valid Symbol in itself.

At any rate, thanks for reading, may the year 2015 be
great for all ruby devs and ruby users!

[nobu (Nobuyoshi Nakada)]

• Has duplicate Feature #11167: Allow an attr_ variant for query-methods that end with a question mark '?' character, such as: def foo? returning @foo added

[nobu (Nobuyoshi Nakada)]

• Has duplicate Feature #12046: Allow attr_reader :foo? to define instance method foo? for accessing @foo added

[matz (Yukihiro Matsumoto)]

• Status changed from Open to Rejected

See #12046.

Matz.