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Various improvements have been made to the Bottom Up Parser in Prolog (BUP for short), such as speed up of processing time, describability for Extraposition Grammars and idioms and so on. In this paper, we present another speed up method without spoiling these assets. The original BUP has no particular mechanism to choose one production rule deterministically; however, in our method the parser...
Tomita's algorithm [Tomita 85] which treats context free grammars makes use of the breadth-first strategy to handle conflicts occurring in a LR parsing table. Considering the compatibility of a breadth-first strategy with parallel processing, we developed a parallel generalized LR parser called PLR, whose algorithm is based on Tomita's algorithm. PLR is implemented in GIIC[Ueda 85] that is a concurrent...