Class: Puppet::Pops::Types::PIntegerType

Inherits:
PNumericType show all
Defined in:
lib/puppet/pops/types/types.rb

Constant Summary collapse

DEFAULT = 
PIntegerType.new(-Float::INFINITY)

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from PNumericType

new_function

Methods inherited from PAbstractRangeType

#eql?, #from, #hash, #initialize, #intersect?, #numeric_from, #numeric_to, #to, #unbounded?

Methods inherited from PAnyType

#==, #accept, #assignable?, #callable?, #callable_args?, #callable_with?, #check_self_recursion, #create, #eql?, #hash, #kind_of_callable?, #name, new_function, #normalize, #really_instance?, #resolve, #simple_name, simple_name, #to_alias_expanded_s, #to_s

Methods inherited from TypedModelObject

_ptype, create_ptype, register_ptypes

Methods included from Visitable

#accept

Methods included from PuppetObject

#_ptype

Constructor Details

This class inherits a constructor from Puppet::Pops::Types::PAbstractRangeType

Class Method Details

.register_ptype(loader, ir) ⇒ Object 



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# File 'lib/puppet/pops/types/types.rb', line 924

def self.register_ptype(loader, ir)
  create_ptype(loader, ir, 'NumericType')
end

Instance Method Details

#adjacent?(o) ⇒ Boolean

Checks if this range is adjacent to the given range



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# File 'lib/puppet/pops/types/types.rb', line 948

def adjacent?(o)
  o.is_a?(PIntegerType) &&  (@to + 1 == o.from || o.to + 1 == @from)
end

#each(&block) ⇒ Object

Returns Enumerator if no block is given Returns nil if size is infinity (does not yield)



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# File 'lib/puppet/pops/types/types.rb', line 991

def each(&block)
  r = Iterable.on(self)
  block_given? ? r.each(&block) : r
end

#finite_range? ⇒ Boolean

Will respond ‘true` for any range that is bounded at both ends.



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# File 'lib/puppet/pops/types/types.rb', line 931

def finite_range?
  @from != -Float::INFINITY && @to != Float::INFINITY
end

#generalize ⇒ Object 



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# File 'lib/puppet/pops/types/types.rb', line 935

def generalize
  DEFAULT
end

#instance?(o, guard = nil) ⇒ Boolean 



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# File 'lib/puppet/pops/types/types.rb', line 939

def instance?(o, guard = nil)
  o.is_a?(Integer) && o >= numeric_from && o <= numeric_to
end

#iterable?(guard = nil) ⇒ Boolean 



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# File 'lib/puppet/pops/types/types.rb', line 968

def iterable?(guard = nil)
  true
end

#iterable_type(guard = nil) ⇒ Object 



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# File 'lib/puppet/pops/types/types.rb', line 972

def iterable_type(guard = nil)
  # It's unknown if the iterable will be a range (min, max) or a "times" (0, max)
  PIterableType.new(PIntegerType::DEFAULT)
end

#merge(o) ⇒ PIntegerType?

Concatenates this range with another range provided that the ranges intersect or are adjacent. When that’s not the case, this method will return ‘nil`



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# File 'lib/puppet/pops/types/types.rb', line 958

def merge(o)
  if intersect?(o) || adjacent?(o)
    min = @from <= o.numeric_from ? @from : o.numeric_from
    max = @to >= o.numeric_to ? @to : o.numeric_to
    PIntegerType.new(min, max)
  else
    nil
  end
end

#new_function(loader) ⇒ Object 



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# File 'lib/puppet/pops/types/types.rb', line 1003

def new_function(loader)
  @@new_function ||= Puppet::Functions.create_loaded_function(:new, loader) do
    local_types do
      type 'Radix       = Variant[Default, Integer[2,2], Integer[8,8], Integer[10,10], Integer[16,16]]'
      type 'Convertible = Variant[Undef, Numeric, Boolean, String, Timespan, Timestamp]'
      type 'NamedArgs   = Struct[{from => Convertible, Optional[radix] => Radix, Optional[abs] => Boolean}]'
    end

    dispatch :from_args do
      param          'Convertible',  :from
      optional_param 'Radix',   :radix
      optional_param 'Boolean', :abs
    end

    dispatch :from_hash do
      param          'NamedArgs',  :hash_args
    end

    def from_args(from, radix = :default, abs = false)
      result = from_convertible(from, radix)
      abs ? result.abs : result
    end

    def from_hash(args_hash)
      from_args(args_hash['from'], args_hash['radix'] || :default, args_hash['abs'] || false)
    end

    def from_convertible(from, radix)
      case from
      when NilClass
        throw :undefined_value
      when Float, Time::TimeData
        from.to_i
      when Integer
        from
      when TrueClass
        1
      when FalseClass
        0
      when String
        begin
          radix == :default ? Integer(from) : Integer(from, assert_radix(radix))
        rescue TypeError => e
          raise TypeConversionError.new(e.message)
        rescue ArgumentError => e
          # Test for special case where there is whitespace between sign and number
          match = Patterns::WS_BETWEEN_SIGN_AND_NUMBER.match(from)
          if match
            begin
              # Try again, this time with whitespace removed
              return from_args(match[1] + match[2], radix)
            rescue TypeConversionError
              # Ignored to retain original error
            end
          end
          raise TypeConversionError.new(e.message)
        end
      else
        t = Puppet::Pops::Types::TypeCalculator.singleton.infer(from).generalize
        raise TypeConversionError.new("Value of type '#{t}' cannot be converted to an Integer")
      end
    end

    def assert_radix(radix)
      case radix
      when 2, 8, 10, 16, :default
      else
        raise ArgumentError.new("Illegal radix: '#{radix}', expected 2, 8, 10, 16, or default")
      end
      radix
    end

  end
end

#range ⇒ Object

Returns the range as an array ordered so the smaller number is always first. The number may be Infinity or -Infinity.



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# File 'lib/puppet/pops/types/types.rb', line 985

def range
  [@from, @to]
end

#size ⇒ Object

Returns Float.Infinity if one end of the range is unbound



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# File 'lib/puppet/pops/types/types.rb', line 978

def size
  return Float::INFINITY if @from == -Float::INFINITY || @to == Float::INFINITY
  1+(to-from).abs
end

#to_size ⇒ PIntegerType

Returns a range where both to and from are positive numbers. Negative numbers are converted to zero



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# File 'lib/puppet/pops/types/types.rb', line 999

def to_size
  @from >= 0 ? self : PIntegerType.new(0, @to < 0 ? 0 : @to)
end