Class: SQLTree::Token

Inherits:
Object
  • Object
show all
Defined in:
lib/sql_tree/token.rb

Direct Known Subclasses

Keyword, Operator, Value

Defined Under Namespace

Classes: Keyword, Number, Operator, String, Value, Variable

Constant Summary collapse

LPAREN = 
Class.new(SQLTree::Token).new('(')
RPAREN = 
Class.new(SQLTree::Token).new(')')
DOT = 
Class.new(SQLTree::Token).new('.')
COMMA = 
Class.new(SQLTree::Token).new(',')
KEYWORDS = 
%w{select from where group having order distinct left right inner outer join and or not as}
ARITHMETHIC_OPERATORS = 
{ '+' => :plus, '-' => :minus, '*' => :multiply, '/' => :divide, '%' => :modulo }
LOGICAL_OPERATORS = 
{ '=' => :eq, '!=' => :ne, '<>' => :ne, '>' => :gt, '<' => :lt, '>=' => :gte, '<=' => :lte }
OPERATORS = 
ARITHMETHIC_OPERATORS.merge(LOGICAL_OPERATORS)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(literal) ⇒ Token

Returns a new instance of Token.



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# File 'lib/sql_tree/token.rb', line 5

def initialize(literal)
  @literal = literal
end

Instance Attribute Details

#literal ⇒ Object

Returns the value of attribute literal.



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

def literal
  @literal
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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

def ==(other)
  other.class == self.class && @literal == other.literal
end

#inspect ⇒ Object 



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# File 'lib/sql_tree/token.rb', line 15

def inspect
  literal
end