module ProcToLambda

Constants

VERSION

Public Class Methods

to_lambda(source_proc) click to toggle source

Convert proc to lambda, retain the context.

@param [Proc] source_proc @example

my_proc = proc { return self + 1 }
my_lambda = ProcToLambda.to_lambda(my_proc)

1.instance_exec(&my_lambda) # => 2

# File lib/proc-to-lambda.rb, line 20
def self.to_lambda(source_proc)
  raise "Supplied argument must be a `Proc`" unless source_proc.is_a?(::Proc)

  return source_proc if source_proc.lambda?

  unbound_method = ::Module.new.module_eval do
    instance_method(define_method(:_, &source_proc))
  end

  lambda do |*args, &block|
    unbound_method.bind(self).call(*args, &block)
  end
end

Public Instance Methods

to_lambda(source_proc) click to toggle source

Same as the class method to_lambda

Use to include

# File lib/proc-to-lambda.rb, line 8
def to_lambda(source_proc)
  ::ProcToLambda.to_lambda(source_proc)
end