Class: Keisan::Token

Inherits:

Object

• Object
• Keisan::Token

Defined in:

lib/keisan/token.rb

Direct Known Subclasses

Keisan::Tokens::Boolean, Keisan::Tokens::Comma, Keisan::Tokens::Group, Keisan::Tokens::Null, Keisan::Tokens::Number, Keisan::Tokens::Operator, Keisan::Tokens::String, Keisan::Tokens::Word

Instance Attribute Summary

• #string ⇒ Object readonly

  Returns the value of attribute string.

Class Method Summary

• .regex ⇒ Object
• .type ⇒ Object

Instance Method Summary

• #initialize(string) ⇒ Token constructor

  A new instance of Token.

• #regex ⇒ Object
• #type ⇒ Object

Constructor Details

#initialize(string) ⇒ Token

Returns a new instance of Token.

Raises:

• (Exceptions::InvalidToken)

# File 'lib/keisan/token.rb', line 4

def initialize(string)
  raise Exceptions::InvalidToken.new(string) unless string.match(regex)
  @string = string
end

Instance Attribute Details

#string ⇒ Object (readonly)

Returns the value of attribute string.

# File 'lib/keisan/token.rb', line 3

def string
  @string
end

Class Method Details

.regex ⇒ Object

Raises:

• (Exceptions::NotImplementedError)

# File 'lib/keisan/token.rb', line 21

def self.regex
  raise Exceptions::NotImplementedError.new(:regex)
end

.type ⇒ Object

# File 'lib/keisan/token.rb', line 13

def self.type
  @type ||= self.to_s.split("::").last.underscore.to_sym
end

Instance Method Details

#regex ⇒ Object

# File 'lib/keisan/token.rb', line 17

def regex
  self.class.regex
end

#type ⇒ Object

# File 'lib/keisan/token.rb', line 9

def type
  self.class.type
end