Hi Folks, In the book Parsing Techniques the authors use a less than symbol with a dot tucked inside for the open parenthesis and a greater than symbol with a dot tucked insider for the close parenthesis. Also, they use an equal sign with a dot over it. You can see the 3 symbols here:
https://books.google.com/books?id=05xA_d5dSwAC&pg=PA267&lpg=PA267&dq=parenthesis+generator+symbols&source=bl&ots=3OwyeBndO8&sig=ZhwoeYRJjm3GTzNNP1vgsAVRisc&hl=en&sa=X&sqi=2&ved=0ahUKEwi577X-o8XNAhWBaz4KHc0QA_EQ6AEIIzAB#v=onepage&q=parenthesis%20generator%20symbols&f=false Are there Unicode symbols for the 3 symbols? /Roger
