Class: Arithmetic::Expression

Inherits:

Object

• Object
• Arithmetic::Expression

Defined in:

lib/arithmetic/expression.rb

Instance Method Summary

• #eval ⇒ Object
• #initialize(expression) ⇒ Expression constructor

  A new instance of Expression.

• #to_s(visitor = identity_function) ⇒ Object

Constructor Details

#initialize(expression) ⇒ Expression

Returns a new instance of Expression.

# File 'lib/arithmetic/expression.rb', line 3

def initialize(expression)
  @parsed_expression = expression
end

Instance Method Details

#eval ⇒ Object

# File 'lib/arithmetic/expression.rb', line 7

def eval
  @result ||= @parsed_expression.eval
end

#to_s(visitor = identity_function) ⇒ Object

# File 'lib/arithmetic/expression.rb', line 11

def to_s(visitor=identity_function)
  @string ||= @parsed_expression.to_s(visitor)
end