Module: Memorb::RubyCompatibility

Defined in:
lib/memorb/ruby_compatibility.rb

Overview

When Memorb code needs to be changed to accomodate older Ruby versions, that code should live here. This has a few advantages:

- it will be clear that there was a need to change the code for Ruby
  compatibility reasons
- when the Ruby versions that required the altered code will no longer
  be supported, locating the places to refactor is easy
- the specific approach needed to accommodate older version of Ruby
  and any explanatory comments need only be defined in one place

Class Method Summary collapse

Class Method Details

.module_constant(receiver, key) ⇒ Object

JRuby * JRuby doesn’t work well with module singleton constants, so an instance variable is used instead.



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# File 'lib/memorb/ruby_compatibility.rb', line 28

def module_constant(receiver, key)
  receiver.instance_variable_get(ivar_name(key))
end

.module_constant_set(receiver, key, value) ⇒ Object 



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# File 'lib/memorb/ruby_compatibility.rb', line 31

def module_constant_set(receiver, key, value)
  n = ivar_name(key)
  if receiver.instance_variable_defined?(n)
    raise "Memorb internal error! Reassignment of constant at #{ n }"
  end
  receiver.instance_variable_set(n, value)
end

.name_error_matches(error, expected_name, expected_receiver) ⇒ Object

JRuby * JRuby does not yet support ‘receiver` on `NameError`. github.com/jruby/jruby/issues/5576



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# File 'lib/memorb/ruby_compatibility.rb', line 42

def name_error_matches(error, expected_name, expected_receiver)
  return false unless error.name.to_s == expected_name.to_s
  ::RUBY_ENGINE == 'jruby' || error.receiver.equal?(expected_receiver)
end