FILE TYPE(X)

/* OS X uses filetypes when creating files. */
 * 1) ifdef MACH_O_CARBON
 * 1) define FILE_TYPE_TEXT 'TEXT'
 * 2) define FILE_TYPE_DATA 'DATA'
 * 3) define FILE_TYPE_SAVE 'SAVE'
 * 4) define FILE_TYPE(X) (_ftype = (X))
 * 1) else
 * 1) define FILE_TYPE(X) ((void)0)
 * 1) endif

Value
((void)0)

Found in
h-basic.h