#define ARG_INT 0
#define ARG_STRING 1
#define ARG_VAR 2
#define ARG_FUNC 3
#define ARG_UNDEF 4

typedef caddr_t (*Proc)();

typedef struct _Arg
{
  int type;
  union _data
    {
      int i;
      char *s;
      struct _Arg *v;
      struct _procCall
	{
	  Proc p;
	  struct _Arg *args;
	} ProcCall;
    } data;
  struct _Arg *next;
} Arg;

typedef struct _FuncMapping
{
  char *name;
  Proc proc;
} FuncMapping;

typedef struct _VarMapping
{
  char *name;
  Arg *arg;
} VarMapping;

typedef struct _KeyToArg
{
  KeySym keysym;
  unsigned int modifiers;
  Arg *arglist;
  struct _KeyToArg *next;
} KeyToArg;