Class: RFunk::Function

Inherits:
Object
  • Object
show all
Defined in:
lib/rfunk/attribute/function.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(this, function_definition, &block) ⇒ Function

Returns a new instance of Function.



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# File 'lib/rfunk/attribute/function.rb', line 5

def initialize(this, function_definition, &block)
  @this = this
  @function_definition = function_definition
  @block = block
  @variables = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *arguments, &block) ⇒ Object 



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# File 'lib/rfunk/attribute/function.rb', line 57

def method_missing(method, *arguments, &block)
  this.send(method, *arguments, &block)
end

Instance Attribute Details

#this ⇒ Object (readonly)

Returns the value of attribute this.



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# File 'lib/rfunk/attribute/function.rb', line 3

def this
  @this
end

Instance Method Details

#assert(&_) ⇒ Object

Raises:



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# File 'lib/rfunk/attribute/function.rb', line 27

def assert(&_)
  return true if yield

  raise RFunk::AssertionError
end

#body(&block) ⇒ Object 



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# File 'lib/rfunk/attribute/function.rb', line 41

def body(&block)
  @body_block = block
end

#execute(*args) ⇒ Object 



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# File 'lib/rfunk/attribute/function.rb', line 45

def execute(*args)
  validate_parameter_types(*args)
  return_value = instance_exec(*args, &block)

  if body_block
    execute_body_block
  else
    validate_return_type(return_value)
    RFunk.option(return_value)
  end
end

#post(&block) ⇒ Object 



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# File 'lib/rfunk/attribute/function.rb', line 37

def post(&block)
  @post_block = block
end

#pre(&block) ⇒ Object 



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# File 'lib/rfunk/attribute/function.rb', line 33

def pre(&block)
  @pre_block = block
end

#val(options) ⇒ Object Also known as: let 



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# File 'lib/rfunk/attribute/function.rb', line 12

def val(options)
  if variables.empty?
    self.variables = options
  else
    error_checking.raise_immutable(options, variables)
    self.variables = variables.merge(options)
  end
end

#value(options) ⇒ Object 



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# File 'lib/rfunk/attribute/function.rb', line 21

def value(options)
  RFunk.some(RFunk.some(variables)[options])
end