#ifndef GRAMMAR_H
#define GRAMMAR_H
/////////////////////////////////////////////////////////////////////
//  grammar.h  -  provides detectors for grammatical constructs    //
//  ver 1.2                                                        //
//                                                                 //
//  Language:     Visual C++, ver 7.0                              //
//  Platfrom:     Dell Dimension 8100, Windows 2000, SP 2.0        //
//  Application:  Prototype for CSE687 Pr#2, Spring 2003           //
//  Author:       Jim Fawcett, CST 2-187, Syracuse University      //
//                (315) 443-3948, jfawcett@twcny.rr.com            //
/////////////////////////////////////////////////////////////////////
/*
    Module Operation:
    =================
    The grammar module provides a set of detector functions that
    identify gramatical constructs captured by the tokens in a
    CSemiExp object.

    Public Interface:
    =================
    CSemiExp se(in);           // create a CSemiExp object
    grammar g(se);            // create a grammar object
    bool b = g.functionDef(); // is a function definition?
    bool b = g.include();     // is an include statement?

*/
/////////////////////////////////////////////////////////////////////
//  Build Process                                                  //
/////////////////////////////////////////////////////////////////////
//  Required Files:                                                //
//    grammar.h, grammar.cpp, CppSemiExp.h, CppSemiExp.cpp,        //
//    CppToker.h, CppToker.cpp                                     //
//                                                                 //
//  Compiler command:                                              //
//    cl /DTEST_GRAMMAR grammar.cpp display.cpp\                   //
//                      CppSemiExp.cpp CppToker.cpp                //
/////////////////////////////////////////////////////////////////////
/*
    Maintenance History:
    ====================
    ver 1.2 : 24 Feb 04
      - remove registerDefaultFilters() and replaced with individual
        calls to registerFilter(&aFilter).
    ver 1.1 : 02/08/04
      - several small changes to accomodate using CppSemiExp and CppToker
        modules instead of Semi and Tok.
    ver 1.0 : 02/08/03
      - first release

*/
//
#include "CppSemiExp.h"

namespace Scanner
{
  class grammar
  {
  public:
    grammar(CSemiExp &se);
    bool include();
    bool functionDef();
    bool invocation();
    bool declar();
  private:
    bool specialKeys(const std::string &s);
    CSemiExp& _se;  // don't copy
  };
  //----< initializes a grammar object with a semiExp >----------

  inline grammar::grammar(CSemiExp &se) : _se(se) {}

  //----< detects #include statements >--------------------------

  inline bool grammar::include()
  {
    return (_se[0]=="#" && _se[1]=="include");
  }
}

#endif