Module: ProcToLambda

Defined in:
lib/proc-to-lambda.rb

Constant Summary collapse

VERSION = 
'0.1.0'.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.to_lambda(source_proc) ⇒ Object

Convert proc to lambda, retain the context.

Examples:

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

1.instance_exec(&my_lambda) # => 2

Parameters:

  • source_proc (Proc) 


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# 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

Instance Method Details

#to_lambda(source_proc) ⇒ Object

Same as the class method to_lambda

Use to include



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# File 'lib/proc-to-lambda.rb', line 8

def to_lambda(source_proc)
  ::ProcToLambda.to_lambda(source_proc)
end