lib/unitwise/expression/decomposer.rb in unitwise-1.0.3 vs lib/unitwise/expression/decomposer.rb in unitwise-1.0.4

@@ -36,10 +36,10 @@
 
       attr_reader :expression, :mode
 
       def initialize(expression)
         @expression = expression.to_s
-        if terms.nil? || terms.empty?
+        if expression.empty? || terms.nil? || terms.empty?
           fail(ExpressionError, "Could not evaluate '#{ expression }'.")
         end
       end
 
       def parse