Class: Dentaku::AST::Subtraction

Inherits:
Arithmetic show all
Defined in:
lib/dentaku/ast/arithmetic.rb

Instance Attribute Summary

Attributes inherited from Operation

#left, #right

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Arithmetic

#initialize, #type

Methods inherited from Operation

#dependencies, #initialize, max_param_count, min_param_count, right_associative?

Methods inherited from Node

arity, #dependencies, peek, #type

Constructor Details

This class inherits a constructor from Dentaku::AST::Arithmetic

Class Method Details

.precedence ⇒ Object 



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# File 'lib/dentaku/ast/arithmetic.rb', line 117

def self.precedence
  10
end

Instance Method Details

#operator ⇒ Object 



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# File 'lib/dentaku/ast/arithmetic.rb', line 113

def operator
  :-
end

#value(context = {}) ⇒ Object 



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# File 'lib/dentaku/ast/arithmetic.rb', line 121

def value(context = {})
  if left.type == :datetime
    Dentaku::DateArithmetic.new(left.value(context)).sub(right.value(context))
  else
    super
  end
end