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metaprogrammingcrystal-lang

Any equivalent of Ruby's public_send method?

In Ruby, to construct a method's name and send it to an object, one can do:

class Foo
  def foo
    "FOO"
  end
end

Foo.new.public_send(:foo)  # => "FOO"
Foo.new.public_send("foo") # => "FOO"

What is equivalent technique for Crystal?

Solution

  • You should remember that Crystal, unlike Ruby, is a compiled, statically-typed language, so dynamic features of Ruby don't map that well to it.

    Crystal's alternative to dynamism is support for macros - but they are not the same, and you shouldn't expect them to work in the same way.

    Specifically, you can't use macros to pick at runtime the method to be called - in Crystal you can't do that, at all.

    But your question is probably an XY problem - ask for what you're actually trying to solve, and there may be a solution for that.