On Properties of Extended LL(k) Grammars
I-Peng Lin and Ching-Chi Hsu
Department of Computer Science and Information Engineering,
National Taiwan University,
Taipei, Taiwan, Republic of China
        A class of context-free grammars, called ELL(k), is investigated. We prove that ELL(k) grammars are LR(k) and show that this class of grammars has the undecidability property.