Module: RPNCalculator

Defined in:
lib/rpn-calculator.rb,
lib/rpn-calculator/cli.rb,
lib/rpn-calculator/version.rb,
lib/rpn-calculator/input/parser.rb,
lib/rpn-calculator/result/input.rb,
lib/rpn-calculator/result/parser.rb,
lib/rpn-calculator/operation/base.rb,
lib/rpn-calculator/input/validator.rb,
lib/rpn-calculator/input_processor.rb,
lib/rpn-calculator/result/operation.rb,
lib/rpn-calculator/result/processor.rb,
lib/rpn-calculator/result/validator.rb,
lib/rpn-calculator/operation/addition.rb,
lib/rpn-calculator/operation/division.rb,
lib/rpn-calculator/operation_processor.rb,
lib/rpn-calculator/io_interface/abstract.rb,
lib/rpn-calculator/io_interface/standard.rb,
lib/rpn-calculator/operation/subtraction.rb,
lib/rpn-calculator/operation/multiplication.rb

Defined Under Namespace

Modules: Input, IoInterface, Operation, Result Classes: CLI, InputProcessor, OperationProcessor

Constant Summary collapse

OPERATION_CLASSES = 
{
  '+' => Operation::Addition,
  '-' => Operation::Subtraction,
  '*' => Operation::Multiplication,
  '/' => Operation::Division
}.freeze
ALLOWED_OPERATORS = 
OPERATION_CLASSES.keys.freeze
INVALID_ARGUMENTS_REGEX = 
/[^\d\s\.#{Regexp.quote(ALLOWED_OPERATORS.join)}]/
OPERATION_PROCESSOR = 
OperationProcessor.new(OPERATION_CLASSES).freeze
INPUT_PROCESSOR = 
InputProcessor.new(
  OPERATION_PROCESSOR,
  Input::Validator.new(INVALID_ARGUMENTS_REGEX),
  Input::Parser.new(ALLOWED_OPERATORS)
).freeze
VERSION = 
'0.4.0'.freeze

Class Method Summary collapse

Class Method Details

.calculate(expression) ⇒ Object 


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# File 'lib/rpn-calculator.rb', line 30

def calculate(expression)
  INPUT_PROCESSOR.process(expression)
end

.start_cli_tool ⇒ Object 


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# File 'lib/rpn-calculator.rb', line 23

def start_cli_tool
  # Here is where we could read and write to another input
  # using stdin and stdout by default
  processor = CLI.new(IoInterface::Standard.new, INPUT_PROCESSOR)
  processor.start
end