Module: Lab42::Result::ClassMethods

Included in:
Lab42::Result
Defined in:
lib/lab42/result/class_methods.rb

Instance Method Summary collapse

Instance Method Details

#error(error, exception: RuntimeError) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/lab42/result/class_methods.rb', line 10

def error(error, exception: RuntimeError)
  raise ArgumentError, "exception must be a subclass of StandardError, but was #{exception.inspect}" unless
  Exception.class === exception && exception < StandardError
  o = allocate
  o.instance_exec do
    @ok = false
    @error = error
    @exception = exception
  end
  o.freeze
end

#from_rescue(error_message = nil, &blk) ⇒ Object 



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# File 'lib/lab42/result/class_methods.rb', line 22

def from_rescue(error_message=nil, &blk)
  ok(blk.())
rescue Exception => e
  error(error_message||e.message, exception: e.class)
end

#new ⇒ Object

Raises:

  • (NoMethodError) 


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# File 'lib/lab42/result/class_methods.rb', line 6

def new(*,**)
  raise NoMethodError, "only use the constructors `.ok` and `.error`"
end

#ok(value = nil) ⇒ Object 



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# File 'lib/lab42/result/class_methods.rb', line 28

def ok(value=nil)
  o = allocate
  o.instance_exec do
    @ok = true
    @value = value
  end
  o.freeze
end