Class: Kalc::Ast::Arithmetic

Inherits:
Object
  • Object
show all
Defined in:
lib/kalc/ast.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(left, right, operator) ⇒ Arithmetic

Returns a new instance of Arithmetic.



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# File 'lib/kalc/ast.rb', line 138

def initialize(left, right, operator)
  @left = left
  @right = right
  @operator = operator
end

Instance Attribute Details

#left ⇒ Object (readonly)

Returns the value of attribute left.



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# File 'lib/kalc/ast.rb', line 134

def left
  @left
end

#operator ⇒ Object (readonly)

Returns the value of attribute operator.



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# File 'lib/kalc/ast.rb', line 136

def operator
  @operator
end

#right ⇒ Object (readonly)

Returns the value of attribute right.



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# File 'lib/kalc/ast.rb', line 135

def right
  @right
end

Instance Method Details

#eval(context) ⇒ Object 



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# File 'lib/kalc/ast.rb', line 144

def eval(context)
  case @operator.to_s.strip
  when '&&'
    @left && @right
  when 'and'
    @left && @right
  when '||'
    @left || @right
  when 'or'
    @left || @right
  when '<='
    @left <= @right
  when '>='
    @left >= @right
  when '='
    @left == @right
  when '=='
    @left == @right
  when '!='
    @left != @right
  when '-'
    @left - @right
  when '+'
    @left + @right
  when '^'
    @left**@right
  when '*'
    @left * @right
  when '/'
    @left / @right
  when '%'
    @left % @right
  when '<'
    @left < @right
  when '>'
    @left > @right
  end
end