Class: Contracts::Builtin::Maybe

Inherits:

Or

• Object
• CallableClass
• Or
• Contracts::Builtin::Maybe

Defined in:

lib/contracts-ruby2/lib/contracts/builtin_contracts.rb,
lib/contracts-ruby3/lib/contracts/builtin_contracts.rb

Overview

Takes a Contract. The contract passes if the contract passes or the given value is nil. Maybe(foo) is equivalent to Or[foo, nil].

Instance Method Summary

• #include_proc? ⇒ Boolean
• #initialize(*vals) ⇒ Maybe constructor

  A new instance of Maybe.

Methods inherited from Or

#to_s, #valid?

Methods inherited from CallableClass

[]

Constructor Details

#initialize(*vals) ⇒ Maybe

Returns a new instance of Maybe.

# File 'lib/contracts-ruby2/lib/contracts/builtin_contracts.rb', line 521

def initialize(*vals)
  super(*(vals + [nil]))
end

Instance Method Details

#include_proc? ⇒ Boolean

Returns:

• (Boolean)

# File 'lib/contracts-ruby2/lib/contracts/builtin_contracts.rb', line 525

def include_proc?
  @vals.include? Proc
end