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module Virtus
class Attribute
class DefaultValue
# Represents default value evaluated via a symbol
#
# @api private
class FromSymbol < DefaultValue
# Return if the class can handle the value
#
# @param [Object] value
#
# @return [Boolean]
#
# @api private
def self.handle?(value)
value.is_a?(Symbol)
end
# Evaluates the value via instance#public_send(value)
#
# Symbol value is returned if the instance doesn't respond to value
#
# @return [Object] evaluated value
#
# @api private
def call(instance, _)
instance.respond_to?(@value, true) ? instance.send(@value) : @value
end
end # class FromSymbol
end # class DefaultValue
end # class Attribute
end # module Virtus
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