Class: Fable::ListValue

Inherits:
Value show all
Defined in:
lib/fable/value.rb

Instance Attribute Summary

Attributes inherited from Value

#value_object

Attributes inherited from RuntimeObject

#original_object, #own_debug_metadata, #parent, #path

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Value

#bad_cast_exception, #copy, create, #to_s

Methods inherited from RuntimeObject

#compact_path_string, #convert_path_to_relative, #copy, #debug_line_number_of_path, #debug_metadata, #indentation_string, #resolve_path, #root_content_container

Constructor Details

#initialize(single_item = nil, single_value = nil) ⇒ ListValue

Returns a new instance of ListValue.



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# File 'lib/fable/value.rb', line 305

def initialize(single_item=nil, single_value=nil)
  if single_item.nil? && single_value.nil?
    super(InkList.new)
  elsif single_item.is_a?(InkList)
    super(InkList.copy_list(single_item))
  else
    super(InkList.new_with_single_item(single_item, single_value))
  end
end

Class Method Details

.retain_list_origins_for_assignment(old_value, new_value) ⇒ Object 



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# File 'lib/fable/value.rb', line 315

def self.retain_list_origins_for_assignment(old_value, new_value)
  # When assigning the empty list, try to retain any initial origin names
  if (old_value.is_a?(ListValue) && new_value.is_a?(ListValue) && new_value.value.list.size == 0)
    new_value.value.set_initial_origin_names(old_value.value.origin_names)
  end
end

Instance Method Details

#cast(new_type) ⇒ Object 



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# File 'lib/fable/value.rb', line 270

def cast(new_type)
  if new_type == IntValue
    max = value.max_item
    if max.nil?
      return IntValue.new(0)
    else
      return IntValue.new(max)
    end
  end

  if new_type == FloatValue
    max = value.max_item
    if max.nil?
      return FloatValue.new(0.0)
    else
      return FloatValue.new(max)
    end
  end

  if new_type == StringValue
    max = value.max_item
    if max.nil?
      return StringValue.new("")
    else
      return StringValue.new(max)
    end
  end

  if new_type == self.class
    return self
  end

  raise bad_cast_exception(new_type)
end

#truthy? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fable/value.rb', line 266

def truthy?
  return value.count > 0
end

#value_type ⇒ Object 



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# File 'lib/fable/value.rb', line 262

def value_type
  return OrderedValueTypes[ListValue]
end