Class: Temporaries::Values::Helpers

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ Helpers

Returns a new instance of Helpers.



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# File 'lib/temporaries/values.rb', line 62

def initialize(name)
  @name = name
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/temporaries/values.rb', line 65

def name
  @name
end

Instance Method Details

#define(mod) ⇒ Object 



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# File 'lib/temporaries/values.rb', line 93

def define(mod)
  if exists
    save = "original_value = #{exists} ? #{get} : Temporaries::Values::UNDEFINED"
    restore = "value.equal?(Temporaries::Values::UNDEFINED) ? #{remove} : #{set}"
  else
    save = "original_value = #{get}"
    restore = set
  end

  mod.class_eval "    def push_\#{name}(\#{signature}, value)\n      \#{save}\n      push_temporary(\#{stack_key}, original_value)\n      \#{set}\n    end\n\n    def pop_\#{name}(\#{signature})\n      value = pop_temporary(\#{stack_key})\n      \#{restore}\n    end\n\n    def with_\#{name}(\#{signature}, value)\n      push_\#{name}(\#{signature}, value)\n      begin\n        yield\n      ensure\n        pop_\#{name}(\#{signature})\n      end\n    end\n  EOS\n\n  mod::ClassMethods.module_eval <<-EOS, __FILE__, __LINE__ + 1\n    def use_\#{name}(\#{signature}, value)\n      temporaries_adapter.before do\n        push_\#{name}(\#{signature}, value)\n      end\n\n      temporaries_adapter.after do\n        pop_\#{name}(\#{signature})\n      end\n    end\n  EOS\nend\n", __FILE__, __LINE__ + 1

#signature(signature = nil) ⇒ Object 



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# File 'lib/temporaries/values.rb', line 67

def signature(signature = nil)
  if signature
    @signature = signature
  else
    @signature
  end
end

#stack_key ⇒ Object 



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# File 'lib/temporaries/values.rb', line 88

def stack_key
  sig_ids = signature.split(/\s*,\s*/).map{|s| s + '.__id__'}.join(', ')
  "[:#{name}, #{sig_ids}]"
end