Thread: Weird errors

Using Dev-Cpp.

Code:

// in a header file
Register *getReg(Vm *, int);

Error: parse error before * token

I think it means the * token in "Vm *".

Any ideas on what this means?

it either means "Register" is not a type, or "Vm" is not a type

That's not the problem:

Code:

// in the same header file
struct REGISTER {
	unsigned long value;
};

typedef struct REGISTER Register;

// in a file included by the header file
struct VM {
	Register a, b, c, d;
	char *bcode;
	unsigned int bcsize;
	unsigned int i;
};

typedef struct VM Vm;

Yes, of course. The structs are above the prototypes.

Update: if I change the "Vm *" to "int", (somehow!) Dev-Cpp compiles it, then if I change it to "Vm *" again, it compiles it that one time. Maybe it's a bug in GCC or MingW?

Originally Posted by kinghajj

Maybe it's a bug in GCC or MingW?

Be sure.

Full context in the question always leads to better answers.

Here's the headers:

vm.h

Code:

#ifndef VM_H
#define VM_H

#include "register.h"

struct VM {
	Register a, b, c, d;
	char *bcode;
	unsigned int bcsize;
	unsigned int i;
};

typedef struct VM Vm;

Vm *createVm(char *, int);
int runVm(Vm *);

#endif

register.h

Code:

#ifndef REGISTER_H
#define REGISTER_H

#include "vm.h"
#include "bc.h"

struct REGISTER {
	unsigned long value;
};

typedef struct REGISTER Register;

Register *getReg(Vm *, int); // error here
void setValue(Register *, unsigned long);

#endif

If you haven't guessed, it's a VM. (Not a serious project; just having fun).

Hope this helps.

Code:

Error E2209 register.h 5: Unable to open include file 'bc.h'

[Commenting that out, and making other assumptions...] Why do these headers include each other? How about this?

Code:

/* register.h */
#ifndef REGISTER_H
#define REGISTER_H

//#include "bc.h"

struct REGISTER {
	unsigned long value;
};

typedef struct REGISTER Register;


#endif

Code:

/* vm.h */
#ifndef VM_H
#define VM_H

#include "register.h"

struct VM {
	Register a, b, c, d;
	char *bcode;
	unsigned int bcsize;
	unsigned int i;
};

typedef struct VM Vm;

Vm *createVm(char *, int);
int runVm(Vm *);
Register *getReg(Vm *, int);
void setValue(Register *, unsigned long);

#endif