Class: Code::Object::Function

Inherits:
Code::Object show all
Defined in:
lib/code/object/function.rb

Direct Known Subclasses

RubyFunction

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Code::Object

#<=>, #==, #code_and_operator, #code_different, #code_equal_equal, #code_equal_equal_equal, #code_exclamation_point, #code_exclusive_range, #code_inclusive_range, #code_or_operator, #code_self, #code_to_string, #falsy?, #hash, maybe, #multi_fetch, repeat, #sig, #truthy?, |

Constructor Details

#initialize(parameters:, body:) ⇒ Function

Returns a new instance of Function.



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# File 'lib/code/object/function.rb', line 8

def initialize(parameters:, body:)
  @parameters = parameters
  @body = body
end

Instance Attribute Details

#body ⇒ Object (readonly)

Returns the value of attribute body.



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# File 'lib/code/object/function.rb', line 6

def body
  @body
end

#parameters ⇒ Object (readonly)

Returns the value of attribute parameters.



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# File 'lib/code/object/function.rb', line 6

def parameters
  @parameters
end

Class Method Details

.name ⇒ Object 



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# File 'lib/code/object/function.rb', line 13

def self.name
  "Function"
end

Instance Method Details

#call(**args) ⇒ Object 



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# File 'lib/code/object/function.rb', line 17

def call(**args)
  operator = args.fetch(:operator, nil)
  arguments = args.fetch(:arguments, [])
  globals = multi_fetch(args, *::Code::GLOBALS)

  case operator.to_s
  when "", "call"
    sig(args) { signature_for_call }
    code_call(*arguments, **globals)
  else
    super
  end
end

#code_call(*arguments, **globals) ⇒ Object 



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# File 'lib/code/object/function.rb', line 31

def code_call(*arguments, **globals)
  context = Context.new({}, parent: globals[:context])

  parameters.each.with_index do |parameter, index|
    if parameter.regular?
      if parameter.regular_splat?
        context.code_set(
          parameter.name,
          List.new(
            arguments.select(&:regular?).map(&:value)
          )
        )
      elsif parameter.keyword_splat?
        context.code_set(
          parameter.name,
          Dictionary.new(
            arguments.select(&:keyword?).map(&:name_value).to_h
          )
        )
      else
        argument = arguments[index]&.value
        argument = parameter.evaluate(**globals) if argument.nil?
        context.code_set(parameter.name, argument)
      end
    elsif parameter.keyword?
      argument = arguments.detect { |argument| argument.name == parameter.name }&.value
      argument = parameter.evaluate(**globals) if argument.nil?
      context.code_set(parameter.name, argument)
    else
      raise NotImplementedError
    end
  end

  body.evaluate(**globals, context:)
end

#inspect ⇒ Object 



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# File 'lib/code/object/function.rb', line 67

def inspect
  "function"
end

#signature_for_call ⇒ Object 



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# File 'lib/code/object/function.rb', line 71

def signature_for_call
  parameters.inject([]) do |signature, parameter|
    if parameter.keyword?
      if signature.last.is_a?(::Hash)
        signature.last[parameter.name] = Object
        signature
      else
        signature + [{ parameter.name => Object }]
      end
    else
      signature + [Object]
    end
  end + [Object.repeat]
end

#to_s ⇒ Object 



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# File 'lib/code/object/function.rb', line 86

def to_s
  ""
end