Class: Mona::DictResult::Sequence

Inherits:
Object
  • Object
show all
Defined in:
lib/mona/dict_result/sequence.rb

Overview

Sequence.call { … } allows monadic ‘do’ notation for DictResult, where #set-ing the first failure skips the remainder of the block and returns the DictResult

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(result = DictResult::EMPTY) ⇒ Sequence 



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# File 'lib/mona/dict_result/sequence.rb', line 10

def initialize(result = DictResult::EMPTY)
  @result = result
  @throw = Object.new
end

Class Method Details

.call(result = DictResult::EMPTY) ⇒ Object 



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# File 'lib/mona/dict_result/sequence.rb', line 8

def self.call(result = DictResult::EMPTY, &) = new(result).call(&)

Instance Method Details

#call ⇒ Object 



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# File 'lib/mona/dict_result/sequence.rb', line 15

def call
  catch(@throw) do
    yield self
    @result
  end
end

#get(key) ⇒ Object 



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# File 'lib/mona/dict_result/sequence.rb', line 28

def get(key) = @result.get(key)

#key?(key) ⇒ Boolean 



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# File 'lib/mona/dict_result/sequence.rb', line 30

def key?(key) = @result.key?(key)

#set(key, value) ⇒ Object 



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# File 'lib/mona/dict_result/sequence.rb', line 22

def set(key, value)
  @result = @result.set(key, value)
ensure
  throw @throw, @result if @result.err?
end