Class: Dslh::ScopeBlock

Inherits:
Object
  • Object
show all
Defined in:
lib/dslh.rb

Overview

of Scope

Class Method Summary collapse

Class Method Details

.nest(bind, block_var, key = nil) ⇒ Object 



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# File 'lib/dslh.rb', line 428

def self.nest(bind, block_var, key = nil)
  block_call = nil

  if key
    block_call = <<-EOS
      #{block_var}_ = proc do
        if #{block_var}.arity.zero?
          #{block_var}.call
        else
          #{block_var}.call(#{key.inspect})
        end
      end

      self.instance_eval(&#{block_var}_)
    EOS
  else
    block_call = <<-EOS
      self.instance_eval(&#{block_var})
    EOS
  end

  eval(<<-EOS, bind)
    if #{block_var}
      __hash_orig = @__hash__
      @__hash__ = {}
      #{block_call}
      __nested_hash = @__hash__
      @__hash__ = __hash_orig
      __nested_hash
    else
      nil
    end
  EOS
end