Class: Deterministic::Either

Inherits:
Object
  • Object
show all
Includes:
Chain, Monad, PatternMatching
Defined in:
lib/deterministic/either.rb,
lib/deterministic/either/chain.rb,
lib/deterministic/either/attempt_all.rb

Overview

Abstract parent of Success and Failure

Direct Known Subclasses

Failure, Success

Defined Under Namespace

Modules: Chain Classes: AttemptAll

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Chain

#chain, #try

Methods included from PatternMatching

#match

Methods included from Monad

#==, #initialize, #join, #map, #value

Class Method Details

.attempt_all(context = OpenStruct.new, &block) ⇒ Object 



4
5
6
 
# File 'lib/deterministic/either/attempt_all.rb', line 4

def self.attempt_all(context=OpenStruct.new, &block)
  AttemptAll.new(context, &block).call
end

Instance Method Details

#<<(other) ⇒ Object 



22
23
24
25
 
# File 'lib/deterministic/either.rb', line 22

def <<(other)
  return self if failure?
  return other if other.is_a? Either
end

#bind(proc = nil, &block) ⇒ Object 



8
9
10
11
12
 
# File 'lib/deterministic/either.rb', line 8

def bind(proc=nil, &block)
  (proc || block).call(value, self.class).tap do |result|
    raise NotMonadError, "Expected #{result.inspect} to be an Either" unless result.is_a? self.class.superclass
  end
end

#failure? ⇒ Boolean

Returns:

  • (Boolean) 


18
19
20
 
# File 'lib/deterministic/either.rb', line 18

def failure?
  is_a? Failure
end

#inspect ⇒ Object 



36
37
38
39
 
# File 'lib/deterministic/either.rb', line 36

def inspect
  name = self.class.name.split("::")[-1]
  "#{name}(#{value})"
end

#success? ⇒ Boolean

Returns:

  • (Boolean) 


14
15
16
 
# File 'lib/deterministic/either.rb', line 14

def success?
  is_a? Success
end

#to_s ⇒ Object 



32
33
34
 
# File 'lib/deterministic/either.rb', line 32

def to_s
  value.to_s
end