Strange XBoard function definitions

[Look]

Hi,

Why so many such declarations/definitions exist in XBoard-4.9.1 ?

For instance from backend.h :

Code: Select all

void SetWhiteToPlayEvent P((void));

I did not see such a style even in K&R 2.

[xr_a_y]

I see this

https://stackoverflow.com/questions/693 ... t-void-foo

[hgm]

P() is a macro #defined in common.h, as

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#if defined(__STDC__) || defined(WIN32) || defined(_amigados)
#define P(args) args
typedef void *VOIDSTAR;
#else
#define P(args)         ()
typedef char *VOIDSTAR;
#endif

It seems to be there or compatibility purposes with compilers that do not allow the function prototypes to have formal parameters.

[Look]

P() is a macro #defined in common.h, as

Code: Select all

#if defined(__STDC__) || defined(WIN32) || defined(_amigados)
#define P(args) args
typedef void *VOIDSTAR;
#else
#define P(args)         ()
typedef char *VOIDSTAR;
#endif

It seems to be there or compatibility purposes with compilers that do not allow the function prototypes to have formal parameters.

Are not these #else some ancient compilers whom have no practical use at such a date ?

[hgm]

Probably. But old habits die hard.