Re: class extension for C

kwikius <>
Fri, 14 Mar 2008 20:31:56 -0700 (PDT)
On Mar 15, 2:26 am, Ian Collins <> wrote:

[You don't have to ask 3 times!]

Jon Slaughter wrote:

I want to use classes in some embedded C dev to make the code more
organized. Is there any post processor that can do this? If not anyone k=


of a very simple way to go about doing this? (some type of free C/C++ li=


processor that I can modify without to much trouble)


I don't need polymorphism, inheritence or encapsulation really(although =


would be nice) or even need to create objects from the class(in a sense =


classes are global static structs).

I just want to be able to write a bit more logical code in C with a litt=


bit of encapsultion(or really just organization).

Why not just use "OO C", structs with function pointer as members?

Something like

typedef struct X X;

struct X
  int i;
  void (*func)( X*, int );


void f( X* this, int n )
  this->i = n;


int main()
  X x;

  x.func = f;

  x.func( &x, 42 );


Could even try some macros (only tested in VC++)

Andy Litle

#include <stdio.h>

struct my{

  int val;

#define MAKEMEMFUN(Class,fun_name) \
  fun_name ## Class( struct Class * This

int MAKEMEMFUN(my,get) )
  return This->val;

void MAKEMEMFUN(my,set), int v)
  This->val = v;

#define MFN(Class, ob,fun_name)\
fun_name ## Class ( ob

int main()
  struct my mm;

  printf("%d\n", MFN(my,&mm,get)) );

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