Class: Contracts::IsA

Inherits:

CallableClass

• Object
• CallableClass
• Contracts::IsA

Defined in:

lib/builtin_contracts.rb

Overview

Takes a class A. If argument.is_a? A, the contract passes. Example: IsA[Numeric]

Instance Method Summary

• #initialize(cls) ⇒ IsA constructor

  A new instance of IsA.

• #to_s ⇒ Object
• #valid?(val) ⇒ Boolean

Methods inherited from CallableClass

[]

Constructor Details

#initialize(cls) ⇒ IsA

Returns a new instance of IsA.

# File 'lib/builtin_contracts.rb', line 224

def initialize(cls)
  @cls = cls
end

Instance Method Details

#to_s ⇒ Object

# File 'lib/builtin_contracts.rb', line 232

def to_s
  "a #{@cls.inspect}"
end

#valid?(val) ⇒ Boolean

Returns:

• (Boolean)

# File 'lib/builtin_contracts.rb', line 228

def valid?(val)
  val.is_a? @cls
end