Class: NumberMuncher::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/number_muncher/parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/number_muncher/parser.rb', line 3

def initialize(value)
  @value = value
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/number_muncher/parser.rb', line 7

def call
  return Numeric.new(value) unless value.is_a?(String)
  return nil if tokens.empty?
  raise InvalidParseExpression, 'parse requires a single number' unless tokens.size == 1

  tokens.first.value

rescue ArgumentError, ZeroDivisionError
  raise InvalidNumber, "#{value} is not valid input to parse."
end