Class: JobIteration::EnumeratorBuilder::Wrapper

Inherits:
Enumerator
  • Object
show all
Defined in:
lib/job-iteration/enumerator_builder.rb

Overview

These wrappers ensure we have a custom type that we can assert on in Iteration. It’s useful that the ‘wrapper` passed to EnumeratorBuilder in `enumerator_builder` is always the type that is returned from `build_enumerator`. This prevents people from implementing custom Enumerators without wrapping them in `enumerator_builder.wrap(custom_enum)`. Think of these wrappers the way you should a middleware.

Class Method Summary collapse

Class Method Details

.wrap(_builder, enum) ⇒ Object 



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# File 'lib/job-iteration/enumerator_builder.rb', line 23

def wrap(_builder, enum)
  new(-> { enum.size }) do |yielder|
    enum.each do |*val|
      yielder.yield(*val)
    end
  end
end