Module: Rulp::Bounds

Included in:
LV
Defined in:
lib/rulp/rulp_bounds.rb

Constant Summary collapse

DIRS = 
{">" => {value: "gt=", equality: "gte="}, "<" => {value: "lt=", equality: "lte="}}
DIRS_REVERSED = 
{">" => DIRS["<"], "<" => DIRS[">"]}

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#const ⇒ Object

Returns the value of attribute const.



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# File 'lib/rulp/rulp_bounds.rb', line 6

def const
  @const
end

Instance Method Details

#<(val) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 37

def <(val)
  relative_constraint("<", val)
end

#<=(val) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 41

def <=(val)
  relative_constraint("<", val, true)
end

#==(val) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 45

def ==(val)
  self.const = val
end

#>(val) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 29

def >(val)
  relative_constraint(">", val)
end

#>=(val) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 33

def >=(val)
  relative_constraint(">", val, true)
end

#bounds ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 54

def bounds
  return nil if !(self.gt || self.lt || self.const)
  return "#{self.name} = #{self.const}" if self.const

  [
    self.gt,
    self.gt ? "<=" : nil,
    self.to_s,
    self.lt ? "<=" : nil,
    self.lt
  ].compact.join(" ")
end

#coerce(something) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 49

def coerce(something)
  @@coerced = true
  return self, something
end

#coerced? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rulp/rulp_bounds.rb', line 23

def coerced?
  was_coerced = @@coerced rescue nil
  @@coerced = false
  return was_coerced
end

#nocoerce ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 19

def nocoerce
  @@coerced = false
end

#relative_constraint(direction, value, equality = false) ⇒ Object 



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# File 'lib/rulp/rulp_bounds.rb', line 11

def relative_constraint direction, value, equality=false
  direction = coerced? ? DIRS_REVERSED[direction] : DIRS[direction]
  self.const = false
  self.send(direction[:value], value)
  self.send(direction[:equality], equality)
  return self
end