Module: Signalize::Struct::Accessors

Included in:
Signalize::Struct
Defined in:
lib/signalize/struct.rb

Instance Method Summary collapse

Instance Method Details

#members ⇒ Object 



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# File 'lib/signalize/struct.rb', line 6

def members
  @members ||= []
end

#signal_accessor(*names) ⇒ Object 



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# File 'lib/signalize/struct.rb', line 10

def signal_accessor(*names)
  names.each do |name|
    members.push(name.to_sym) unless members.find { _1 == name.to_sym }
    signal_getter_name = "#{name}_signal".freeze
    ivar_name = "@#{name}".freeze
  
    define_method "#{name}_signal" do
      instance_variable_get(ivar_name)
    end
  
    define_method name do
      send(signal_getter_name)&.value
    end
  
    define_method "#{name}=" do |val|
      if instance_variable_defined?(ivar_name)
        raise Signalize::Error, "Cannot assign a signal to a signal value" if val.is_a?(Signalize::Signal)
  
        sig = instance_variable_get(ivar_name)
        if sig.is_a?(Signalize::Computed)
          raise Signalize::Error, "Cannot set value of computed signal `#{ivar_name.delete_prefix("@")}'"
        end
  
        sig.value = val
      else
        val = Signalize.signal(val) unless val.is_a?(Signalize::Computed)
        instance_variable_set(ivar_name, val)
      end
    end
  end
end