Class: Proc

Inherits:
Object show all
Defined in:
lib/runtime/events.rb,
lib/runtime/command.rb

Overview

Re-open the Proc class to define #to_lambda

Constant Summary collapse

WRONG_NUMBER_ARGUMENTS_MESSAGE = 
"Wrong number of arguments (given %<args>s, expected %<arity>s)".freeze

Instance Method Summary collapse

Instance Method Details

#receiver ⇒ Object 



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# File 'lib/runtime/command.rb', line 42

def receiver
  binding.eval('self')
end

#to_lambda ⇒ Object

rubocop: disable Metrics/MethodLength rubocop: disable Style/Lambda



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# File 'lib/runtime/events.rb', line 47

def to_lambda
  return self if lambda?
  # Save local reference to self so we can use it in the following lambda scope
  source_proc = self
  ->(*args, **kwargs, &block) do
    # Enforce strict arity like a lambda
    source_arity = source_proc.arity
    if source_arity >= 0 && args.length != source_arity
      raise ArgumentError, format(
        WRONG_NUMBER_ARGUMENTS_MESSAGE, args: args.length, arity: source_arity)
    elsif args.length < (min = -source_arity - 1)
      raise ArgumentError, format(
        WRONG_NUMBER_ARGUMENTS_MESSAGE, args: args.length, arity: "#{min}+")
    end
    # Preserve original binding/locals/self
    source_proc.call(*args, **kwargs, &block)
  end
end