include/AD/automata/ll1.h

   1 //////////////////////////////////////////////////////////////////////////////
   2 // NOTICE:
   3 //
   4 // ADLib, Prop and their related set of tools and documentation are in the
   5 // public domain.   The author(s) of this software reserve no copyrights on
   6 // the source code and any code generated using the tools.  You are encouraged
   7 // to use ADLib and Prop to develop software, in both academic and commercial
   8 // settings, and are free to incorporate any part of ADLib and Prop into
   9 // your programs.
  10 //
  11 // Although you are under no obligation to do so, we strongly recommend that
  12 // you give away all software developed using our tools.
  13 //
  14 // We also ask that credit be given to us when ADLib and/or Prop are used in
  15 // your programs, and that this notice be preserved intact in all the source
  16 // code.
  17 //
  18 // This software is still under development and we welcome any suggestions
  19 // and help from the users.
  20 //
  21 // Allen Leung
  22 // 1994
  23 //////////////////////////////////////////////////////////////////////////////
  24
  25 #ifndef LL1_parser_h
  26 #define LL1_parser_h
  27
  28 //
  29 // Class |LL1| represents a parser generated by a LL(1) grammar.
  30 // The algorithm used is the one described in \cite{FL-1988}.
  31 //
  32
  33 #include <AD/automata/grammar.h>  // Canonical parser grammar
  34 #include <AD/automata/compdfa.h>  // Compressed sparse dfa
  35
  36 class LL1 {
  37
  38    LL1(const LL1&);                // no copy constructor
  39    void operator = (const LL1&);   // no assignment
  40
  41 protected:
  42
  43    typedef Grammar::NonTerminal  NonTerminal;
  44    typedef Grammar::Terminal     Terminal;
  45    typedef Grammar::Action       Action;
  46    typedef Grammar::Production   Production;
  47    typedef CompressedDFA::State  State;
  48    typedef CompressedDFA::Offset Offset;
  49
  50    const Offset * base;
  51    const State  * next;
  52    const Grammar grammar;
  53
  54 public:
  55
  56    LL1() {}
  57
  58    LL1( const Offset   base_table [],
  59         const State    next_table [],
  60         const Grammar& G
  61       ) : base(base_table), next(next_table), grammar(G) {}
  62
  63   ~LL1() {}
  64 };
  65
  66 #endif