On Sun, Dec 31, 2006 at 02:32:25PM -0500, Robert P. J. Day wrote: > + (a) Enclose those statements in a do - while block: > + > + #define macrofun(a, b, c) \ > + do { \ > + if (a == 5) \ > + do_this(b, c); \ > + } while (0)
nitpick, please don't add an indentaion level for the do {. Do this should look like: #define macrofun(a, b, c) \ do { \ if (a == 5) \ do_this(b, c); \ } while (0) > + (b) Use the gcc extension that a compound statement enclosed in > + parentheses represents an expression: > + > + #define macrofun(a, b, c) ({ \ > if (a == 5) \ > do_this(b, c); \ > - } while (0) > + }) I'd rather document to not use this - it makes the code far less redable. And it's a non-standard extension, something we only use if it provides us a benefit which it doesn't here. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/