again, "was not declared in this scope"

[kayo]

I stuck with these errors,and I really hope someone could help me.
(I don't understand why MTPREDICATE_CLASS is ok, and MTPREDICATE_AND_CLASS, MTPREDICATE_OR_CLASS,MTPREDICATE_NOT_CLASS are not.They are defined in a same file)
Thank u in advance.

MTpredicate.h: In member function ‘virtual GiSTobjid AndPred::IsA()’:
MTpredicate.h:97: error: ‘MTPREDICATE_AND_CLASS’ was not declared in this scope
MTpredicate.h: In member function ‘virtual GiSTobjid OrPred::IsA()’:
MTpredicate.h:137: error: ‘MTPREDICATE_OR_CLASS’ was not declared in this scope
MTpredicate.h: In member function ‘virtual GiSTobjid NotPred::IsA()’:
MTpredicate.h:178: error: ‘MTPREDICATE_NOT_CLASS’ was not declared in this scope

MTpredicate.h:

#ifndef MTPREDICATE_H
#define MTPREDICATE_H

#include "MTobject.h"

//class GiSTentry;

typedef enum {
FUZZY_STANDARD,
FUZZY_ALGEBRAIC
} language;

typedef enum {
LINEAR,
EXPONENTIAL,
DISTR
} dist2sim;

extern language query_language;

double Dist2Sim(double dist);
double Sim2Dist(double sim);

class MTpred: public GiSTobject { // the base class for predicates
public:
virtual GiSTobjid IsA() { return MTPREDICATE_CLASS; }
...
};

class Pred: public MTpred { // a simple predicate
public:
...
GiSTobjid IsA() { return MTPREDICATE_CLASS; }
...
};

class AndPred: public MTpred { // a conjunction of two predicates
public:
...
GiSTobjid IsA() { return MTPREDICATE_AND_CLASS; }
...
};

class OrPred: public MTpred { // a disjunction of two predicates
public:
...
GiSTobjid IsA() { return MTPREDICATE_OR_CLASS; }
...
};

class NotPred: public MTpred { // a negated predicate
public:
...
GiSTobjid IsA() { return MTPREDICATE_NOT_CLASS; }
...
};

the objects MTPREDICATE_AND_CLASS,MTPREDICATE_OR_CLASS,MTPREDICATE_NOT_CLASS are defined in GISTdefs.h:

#ifndef GISTDEFS_H
#define GISTDEFS_H

#include <assert.h>
#include <stdlib.h>
#include <math.h>

#ifdef PRINTING_OBJECTS
#include <iostream.h>
#endif

typedef unsigned long GiSTpage;
typedef enum {
GISTOBJECT_CLASS,
GIST_CLASS,
BT_CLASS,
RT_CLASS,
MT_CLASS,
GISTENTRY_CLASS,
GISTNODE_CLASS,
BTNODE_CLASS,
BTENTRY_CLASS,
BTKEY_CLASS,
RTNODE_CLASS,
RTENTRY_CLASS,
RTKEY_CLASS,
MTNODE_CLASS,
MTENTRY_CLASS,
MTKEY_CLASS,
GISTPREDICATE_CLASS,
BTPREDICATE_CLASS,
RTPREDICATE_CLASS,
MTPREDICATE_CLASS,
MTPREDICATE_AND_CLASS,
MTPREDICATE_OR_CLASS,
MTPREDICATE_NOT_CLASS,
GISTCURSOR_CLASS
} GiSTobjid;

// GiSTobject is the base class for all GiST classes
// It provides identity, equality tests and display of objects

class GiSTobject
{ ...};

[helios]

I don't see MTpredicate.h including GISTdefs.h.

[kayo]

@helios
Thanks for ur reply.But even I include it, it won't work.

[S6k9GNh0]

...The compiler CHEATS.

I dunno to be honest. I can't seem to find the bug.

[z05DSL3A]

I have only given it a quick look but...
"...was not declared in this scope..." would suggest that you need to use scope resolution on your return

virtual GiSTobjid IsA() { return GiSTobjid::MTPREDICATE_CLASS; }

That's probably wrong, it is probably something funky with your includes, what is in "MTobject.h"?

[kayo]

@computerquip : thanks anyway
@Grey Wolf: thanks for ur reply.nothing special with MTobject:

#ifndef MTOBJECT_H
#define MTOBJECT_H

extern int compdists;
extern int dimension;

#ifndef MIN
#define MIN(x, y) ((x<y)? (x): (y))
#define MAX(x, y) ((x>y)? (x): (y))
#endif

#include <stdio.h>
#include "GiSTdefs.h"
class Object : public GiSTobject // the DB object class
{
public:
...
#ifdef PRINTING_OBJECTS
void Print(ostream& os) const;
#endif
};

...

#endif

[z05DSL3A]

Nothing springs out at me, the only thing that looks odd is MTpredicate.h looks like it needs to include GISTdefs.h and is doing so via including MTobject.h. I can't see why MTpredicate.h needs MTobject.h, so you could try changing it to GISTdefs.h.

#ifndef MTPREDICATE_H
#define MTPREDICATE_H

//#include "MTobject.h"
#include "GISTdefs.h"
//... 

[kayo]

@Grey Wolf: thanks. I've tried it, but it still didn't work. The codes actually are very very old (written in 2000), I don't think it's compatible with the current compiler.I'm going to try to run it on an older machine.Thanks again.