() 康桥 <usakq12345@gmail.com>
() Fri, 06 Dec 2013 18:30:16 +0800

   But I still leave one function not understand.  It's function
   digraph in the macro lalr-parser in file lalr.scm.  It seems
   that this function is trying to traverse a digraph and make
   each FOLLOW set corresponding a vertex in the digraph the union
   of it and the FOLLOW sets corrsponding the vertices which can
   be reached from the vectex I mentioned before.  But I can't
   figure out what algorithm it uses.

   Anyone who know this algorithm?

At first glance it seems to be a standard fanout computation.
What do you mean by "know"?  Are you looking for its name?

   BTW, should we rewrite lalr-scm in a more scheme way(even to
   make the process of parser generating slower)?

Why don't you go ahead and try, then post your findings?

-- 
Thien-Thi Nguyen
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