Class: RDF::Literal::NegativeInteger

Inherits:
NonPositiveInteger show all
Defined in:
lib/rdf/xsd/integer.rb

Overview

negativeInteger is derived from nonPositiveInteger by setting the value of maxInclusive to be -1. This results in the standard mathematical concept of the negative integers. The value space of negativeInteger is the infinite set {...,-2,-1}. The base type of negativeInteger is nonPositiveInteger.

See Also:

Constant Summary collapse

GRAMMAR = 
/^\-\d+$/.freeze
DATATYPE = 
RDF::XSD.negativeInteger

Instance Method Summary collapse

Instance Method Details

#-@ ⇒ RDF::Literal::Numeric

Returns self negated.

Returns:

  • (RDF::Literal::Numeric) 


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# File 'lib/rdf/xsd/integer.rb', line 43

def -@
  if object != 0
    # XXX Raise error?
  end
  self.class.new(-self.object)
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rdf/xsd/integer.rb', line 50

def valid?
  super && @object < 0
end