软件包: ml-lpt (110.79-6)

SML/NJ language processing tools

Tradition has it that when a new programming language is introduced, new scanner and parser generators are written in that language, and generate code for that language. Traditional also has it that the new tools are modeled after the old lex and yacc tools, both in terms of the algorithms used, and often the syntax as well. The language Standard ML is no exception: ml-lex and ml-yacc are the SML incarnations of the old Unix tools.

This package has two new tools, ml-ulex and ml-antlr, that follow tradition in separating scanning from parsing, but break from tradition in their implementation: ml-ulex is based on regular expression derivatives rather than subset-construction, and ml-antlr is based on LL(k) parsing rather than LALR(1) parsing.