www.pudn.com > 12cocorc.zip > CR_ERROR.HPP

//********************************************************** 
//   CR_ERROR.HPP 
//   Coco/R C++ Support Library. 
//   Author: Frankie Arzu  
// 
//   Jun 12, 1996  Version 1.06 
//      Many fixes and suggestions thanks to 
//      Pat Terry  
//   Oct 11, 1997   Version 1.07 
//      Change definition of FileName to local storage 
//********************************************************** 
 
#ifndef CR_ERROR_H 
#define CR_ERROR_H 
 
#include "cr_abs.hpp" 
#include  
 
const int MINERRORNO = 1000;   // Error numbers > MINERRORNO are user numbers 
 
class ErrDesc { 
  public: 
    ErrDesc(int n, int l = 0, int c = 0) 
      { nr = n; line = l; col = c; next = NULL; }; 
    ~ErrDesc() 
      { if (next) delete next; }; 
    void SetNext(ErrDesc *n) 
      { next = n; }; 
    ErrDesc *GetNext() 
      { return next; }; 
    int nr, line, col; 
  private: 
    ErrDesc *next; 
}; 
 
class CRError : public AbsError { 
  public: 
    CRError(char *name, AbsScanner *S, 
            int MinUserNo = MINERRORNO, int MinErr = 2); 
    // Create error reporter and associate with SourceFile and scanner S 
    // Set MinErr as a limit on error message clustering, and MinUserNo as 
    // a barrier for distinguishing private and user defined numbers 
 
    ~CRError(); 
 
    virtual void ReportError(int nr) 
    // Associates error nr with most recently parsed token 
      { if (nr <= MinUserError) nr = MinUserError; 
        StoreErr(nr, Scanner->CurrSym); }; 
 
    virtual char *GetErrorMsg(int n) { return ""; }; 
    // Retrieves automatically derived error message text for error n 
 
    virtual char *GetUserErrorMsg(int n) { return ""; }; 
    // Retrieves user supplied error message text for error n 
 
    void SetOutput(FILE *file) { lst = file; }; 
    // Specifies file for error listing and reporting 
 
    void PrintListing(AbsScanner *Scanner); 
    // Generates source listing with error messages merged into it 
 
    virtual void SummarizeErrors(); 
    // Generates listing of errors only 
 
    int MinUserError;  // Barrier for distinguishing private error numbers 
    int ErrorDist;     // Number of tokens parsed since last error detected 
    int Errors;        // Number of errors reported 
 
    // following were specified in abstract base class 
    virtual void Store(int nr, int line, int col, long pos); 
    virtual void StoreErr(int nr, AbsToken &Token); 
    virtual void StoreWarn(int nr, AbsToken &Token); 
  protected: 
    AbsScanner *Scanner; 
    FILE *lst; 
    char FileName[256]; 
    int MinErrorDist; 
    void PrintErrMsg(int nr); 
    void PrintErr(int nr, int col); 
    ErrDesc *FirstErr, *LastErr; 
}; 
 
#endif // CR_ERROR_H