Module: Keka

Extended by:
Context::Originable
Defined in:
lib/keka.rb,
lib/keka/result.rb,
lib/keka/context.rb,
lib/keka/version.rb,
lib/keka/exceptions.rb

Defined Under Namespace

Classes: Context, Halt, Result

Constant Summary collapse

VERSION = 
"0.5.0"

Class Method Summary collapse

Methods included from Context::Originable

rescue_with, run

Class Method Details

.err!(msg = nil) ⇒ Object

Raises:



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# File 'lib/keka.rb', line 56

def err!(msg = nil)
  raise Halt.new(err_result(msg))
end

.err_if!(evaluator, msg = nil, &block) ⇒ Object 



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# File 'lib/keka.rb', line 10

def err_if!(evaluator, msg = nil, &block)
  if (evaluator.respond_to?(:ok?) ? evaluator.ok? : evaluator)
    if msg
      raise Halt.new(err_result(msg))
    elsif block_given?
      message = yield block
      raise Halt.new(err_result(message))
    else
      raise Halt.new(err_result)
    end
  end
end

.err_result(msg = nil) ⇒ Object

private (maybe)



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# File 'lib/keka.rb', line 70

def err_result(msg = nil)
  Result.new(false, msg)
end

.err_unless!(evaluator, msg = nil, &block) ⇒ Object 



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# File 'lib/keka.rb', line 23

def err_unless!(evaluator, msg = nil, &block)
  if evaluator.is_a? self::Result
    return if evaluator.ok?
    if msg
      evaluator.msg = msg
    else
      evaluator.msg = yield block if block_given?
    end
    raise Halt.new(evaluator)
  else
    unless evaluator
      error_result = \
        if msg
          err_result(msg)
        else
          message = yield block if block_given?
          err_result(message)
        end
      raise Halt.new(error_result)
    end
  end
end

.ok!(msg = nil) ⇒ Object

Raises:



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# File 'lib/keka.rb', line 60

def ok!(msg = nil)
  raise Halt.new(ok_result(msg))
end

.ok_if!(evaluator, msg = nil) ⇒ Object 



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# File 'lib/keka.rb', line 46

def ok_if!(evaluator, msg = nil)
  if evaluator.is_a? self::Result
    return unless evaluator.ok?
    evaluator.msg = msg if msg
    raise Halt.new(evaluator)
  else
    raise Halt.new(ok_result(msg)) if evaluator
  end
end

.ok_result(msg = nil) ⇒ Object

private (maybe)



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# File 'lib/keka.rb', line 65

def ok_result(msg = nil)
  Result.new(true, msg)
end