Module: Mimic::DefineMethods

Defined in:
lib/mimic/define_methods.rb

Constant Summary collapse

Error = 
::Class.new(RuntimeError)

Class Method Summary collapse

Class Method Details

.call(cls, subject_methods = nil, record: nil) ⇒ Object 



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# File 'lib/mimic/define_methods.rb', line 5

def self.call(cls, subject_methods=nil, record: nil)
  subject_methods ||= Mimic.subject_methods(cls)

  subject_methods.each do |mthd|
    define_method(cls, mthd, record)
  end

  nil
end

.define_method(cls, mthd, record) ⇒ Object 



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# File 'lib/mimic/define_methods.rb', line 15

def self.define_method(cls, mthd, record)
  method_definition = method_definition(mthd, record)
  cls.class_eval(method_definition)
end

.method_definition(mthd, record) ⇒ Object 



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# File 'lib/mimic/define_methods.rb', line 20

def self.method_definition(mthd, record)
  "
    #{record ? "record " : "" }#{signature(mthd)}
      Void.new
    end
  "
end

.parameter_list(parameters) ⇒ Object 



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# File 'lib/mimic/define_methods.rb', line 34

def self.parameter_list(parameters)
  parameter_list = ''
  parameters.each do |parameter|
    parameter_signature = parameter_signature(parameter)
    parameter_list << "#{parameter_signature}, "
  end

  parameter_list[0...-2]
end

.parameter_signature(parameter) ⇒ Object 



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# File 'lib/mimic/define_methods.rb', line 44

def self.parameter_signature(parameter)
  type = parameter[0]
  name = parameter.fetch(1) { :args }

  case type
  when :opt
    return "#{name}=nil"
  when :req
    return "#{name}"
  when :key
    return "#{name}: nil"
  when :keyreq
    return "#{name}:"
  when :rest
    if name == :*
      return "*"
    else
      return "*#{name}"
    end
  when :keyrest
    if name == :**
      return "**"
    else
      return "**#{name}"
    end
  when :block
    if name == :&
      return "&"
    else
      return "&#{name}"
    end
  else
    raise Error, "Unknown parameter type (Name: #{name.inspect}, Type: #{type.inspect})"
  end
end

.signature(mthd) ⇒ Object 



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# File 'lib/mimic/define_methods.rb', line 28

def self.signature(mthd)
  parameter_list = parameter_list(mthd.parameters)

  "def #{mthd.name}(#{parameter_list})"
end