Class: Rtype::Behavior::NumericCheck

Inherits:
Base show all
Defined in:
lib/rtype/behavior/numeric_check.rb

Direct Known Subclasses

FloatCheck, IntegerCheck

Constant Summary collapse

@@conditions = 
[
	:>, :<, :>=, :<=, :==
]

Instance Method Summary collapse

Methods inherited from Base

[]

Constructor Details

#initialize(condition, x) ⇒ NumericCheck

Returns a new instance of NumericCheck.

Parameters:

  • condition (Symbol)
  • x (Numeric)

Raises:

  • (ArgumentError) 


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# File 'lib/rtype/behavior/numeric_check.rb', line 10

def initialize(condition, x)
	raise ArgumentError, "Invalid condition '#{condition}'" unless @@conditions.include?(condition)
	raise ArgumentError, "x is not a Numeric" unless x.is_a?(Numeric)
	@condition = condition
	@x = x
	@lambda = case condition
		when :>
			lambda { |obj| obj > @x }
		when :<
			lambda { |obj| obj < @x }
		when :>=
			lambda { |obj| obj >= @x }
		when :<=
			lambda { |obj| obj <= @x }
		when :==
			lambda { |obj| obj == @x }
	end
end

Instance Method Details

#error_message(value) ⇒ Object 



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# File 'lib/rtype/behavior/numeric_check.rb', line 37

def error_message(value)
	"Expected #{value.inspect} to be a numeric #{@condition} #{@x}"
end

#valid?(value) ⇒ Boolean

Returns:



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# File 'lib/rtype/behavior/numeric_check.rb', line 29

def valid?(value)
	if value.is_a?(Numeric)
		@lambda.call(value)
	else
		false
	end
end