Class: Mayak::Predicates::Rule

Inherits:
Object
  • Object
show all
Extended by:
T::Generic, T::Helpers, T::Sig
Defined in:
lib/mayak/predicates/rule.rb

Constant Summary collapse

A = 
type_member

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(&blk) ⇒ Rule

Returns a new instance of Rule.



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# File 'lib/mayak/predicates/rule.rb', line 17

def initialize(&blk)
  @fn = T.let(blk, T.proc.params(arg0: A).returns(T::Boolean))
end

Instance Attribute Details

#fn ⇒ Object (readonly)

Returns the value of attribute fn.



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# File 'lib/mayak/predicates/rule.rb', line 14

def fn
  @fn
end

Instance Method Details

#any(another) ⇒ Object Also known as: | 



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# File 'lib/mayak/predicates/rule.rb', line 35

def any(another)
  Mayak::Predicates::Rule[A].new do |object|
    fn.call(object) || another.call(object)
  end
end

#both(another) ⇒ Object Also known as: & 



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# File 'lib/mayak/predicates/rule.rb', line 27

def both(another)
  Mayak::Predicates::Rule[A].new do |object|
    fn.call(object) && another.call(object)
  end
end

#call(object) ⇒ Object 



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# File 'lib/mayak/predicates/rule.rb', line 22

def call(object)
  fn.call(object)
end

#from(function) ⇒ Object 



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# File 'lib/mayak/predicates/rule.rb', line 55

def from(function)
  Mayak::Predicates::Rule.new do |object|
    fn.call(function.call(object))
  end
end

#negate ⇒ Object Also known as: ! 



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# File 'lib/mayak/predicates/rule.rb', line 43

def negate
  Mayak::Predicates::Rule[A].new do |object|
    !fn.call(object)
  end
end

#presence ⇒ Object 



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# File 'lib/mayak/predicates/rule.rb', line 62

def presence
  Mayak::Predicates::Rule[T.nilable(A)].new do |object|
    case object
    when nil
      false
    else
      fn.call(object)
    end
  end
end