Ruby » Ruby master

I don't think there is any use case for Random::DEFAULT, but happy to hear if there is and there is no trivial replacement.

As mentioned here: https://bugs.ruby-lang.org/issues/17322#note-7
there are several users.

For example, I will use Random::DEFAULT for the default random generator for dice rolling method like:

def roll rnd = Random::DEFAULT
  rnd.rand(6)+1
end

for hobby use (non-serious use case).

I don't against to remove Random::DEFAULT, but need to care about current users.

def roll rnd = nil
  (rnd ? rnd.rand(6) : rand(6)) + 1
end

is one way, but I think some people can like previous definition.

It seems pretty rare to need to supply a custom Random instance.
But in such a case, it would be easy to create an explicit one in e.g. the constructor:

class Dice
  def initialize(random = Random.new)
    @random = random
  end

  def roll
    @random.rand(6) + 1
  end
end

If it needs to scale and run well with parallel threads, the built-in Kernel#rand is probably the only good option.

OK, accepted.

Matz.

Just realized, another way to write that roll method (without deprecation) is:

def roll rnd = Random
  rnd.rand(6)+1
end

I also noticed deprecated constants are no longer warned by default as they depend on Warning[:deprecated].