CODEWITHSUNDEEP
objective-cc
John Qualis
John Qualis

Reputation: 1733

compilation error in objective-c file

I am developing a command line app which uses obj-c and c files together. In my obj-c file (say x.m), I use a struct which uses an interface and the interface uses a struct. This is easily handled in C++ with forward declarations but I need obj-c in my app.

I was wondering if someone can please shed some light on what I doing wrong.

Appreciate any help and thanks in advance.

typedef struct mystruct_s
{
  ...
  ....
} mystruct;

struct abc ; 
@interface abcDelegate:NSObject {
     @public
          struct abc *abc; 
} 
@end

struct abc 
{
     mystruct b
     abcDelegate *abcdelegate; 
};

I get the following error error:

expected specifier-qualifier-list before ‘mystruct’

Upvotes: 0

Views: 105

Answers (2)

Andrew
Andrew

Reputation: 24846

You've forgot ;

should be

struct abc 
{
     mystruct b;
     abcDelegate *abcdelegate; 
};

If using .m file you must use c-style structs. such as

typedef struct mystruct_
{
...
} mystruct;

or 

struct abc 
{
     struct mystruct b;
     abcDelegate *abcdelegate; 
};

If you want structs just like in c++ change your file extension to .mm to support c++

Upvotes: 1

Eimantas
Eimantas

Reputation: 49335

Almost there. Change the code to look like this:

struct abc 
{
     mystruct b;
     abcDelegate *abcdelegate; 
};

@interface abcDelegate:NSObject {
     @public
          struct abc *abc; 
} 
@end

Upvotes: 0

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