how to make a macro work as a single line if stmt without braces

Liste des GroupesRevenir à cl c  
Sujet : how to make a macro work as a single line if stmt without braces
De : mark (at) *nospam* qtrac.eu (Mark Summerfield)
Groupes : comp.lang.c
Date : 21. Sep 2024, 08:35:49
Autres entêtes
Message-ID : <PaWdnZ3R-9zI6nP7nZ2dnZfqn_GdnZ2d@brightview.co.uk>
User-Agent : Pan/0.149 (Bellevue; 4c157ba)
I have this macro:

#define WARN(...)                                       \
    do {                                                \
        fprintf(stderr, "%s#%d: ", __FILE__, __LINE__); \
        fprintf(stderr, __VA_ARGS__);                   \
    } while (0);

which I use like this:

total++;
if (failed) {
    WARN("failed because...");
} else
    ok++;

I would prefer to be able to write this instead:

total++;
if (failed)
    WARN("failed because...");
else
    ok++;

but doing so results in a compiler error:

error: 'else' without a previous 'if'

Date Sujet#  Auteur
21 Sep 24 * how to make a macro work as a single line if stmt without braces61Mark Summerfield
21 Sep 24 +- Re: how to make a macro work as a single line if stmt without braces1Lawrence D'Oliveiro
21 Sep 24 +* Re: how to make a macro work as a single line if stmt without braces50David Brown
21 Sep 24 i`* Re: how to make a macro work as a single line if stmt without braces49Andrey Tarasevich
21 Sep 24 i +- Re: how to make a macro work as a single line if stmt without braces1Bart
21 Sep 24 i +- Re: how to make a macro work as a single line if stmt without braces1Opus
21 Sep 24 i +* Re: how to make a macro work as a single line if stmt without braces5Keith Thompson
22 Sep 24 i i`* Re: how to make a macro work as a single line if stmt without braces4Andrey Tarasevich
22 Sep 24 i i +- Re: how to make a macro work as a single line if stmt without braces1Keith Thompson
22 Sep 24 i i +- Re: how to make a macro work as a single line if stmt without braces1David Brown
27 Sep 24 i i `- Re: how to make a macro work as a single line if stmt without braces1Tim Rentsch
22 Sep 24 i +* Re: how to make a macro work as a single line if stmt without braces25David Brown
22 Sep 24 i i`* Re: how to make a macro work as a single line if stmt without braces24Kaz Kylheku
22 Sep 24 i i +* Re: how to make a macro work as a single line if stmt without braces21Bart
22 Sep 24 i i i+* Re: how to make a macro work as a single line if stmt without braces14Michael S
22 Sep 24 i i ii+- Re: how to make a macro work as a single line if stmt without braces1Bart
24 Sep 24 i i ii`* Re: how to make a macro work as a single line if stmt without braces12Tim Rentsch
24 Sep 24 i i ii +* Re: how to make a macro work as a single line if stmt without braces5Andrey Tarasevich
24 Sep 24 i i ii i+- Re: how to make a macro work as a single line if stmt without braces1David Brown
24 Sep 24 i i ii i+* Re: how to make a macro work as a single line if stmt without braces2Bart
24 Sep 24 i i ii ii`- Re: how to make a macro work as a single line if stmt without braces1Keith Thompson
27 Sep 24 i i ii i`- Re: how to make a macro work as a single line if stmt without braces1Tim Rentsch
24 Sep 24 i i ii `* Re: how to make a macro work as a single line if stmt without braces6Bart
24 Sep 24 i i ii  +* Re: how to make a macro work as a single line if stmt without braces2Keith Thompson
24 Sep 24 i i ii  i`- Re: how to make a macro work as a single line if stmt without braces1Bart
24 Sep 24 i i ii  `* Re: how to make a macro work as a single line if stmt without braces3Kaz Kylheku
24 Sep 24 i i ii   `* Re: how to make a macro work as a single line if stmt without braces2Bart
25 Sep 24 i i ii    `- Re: how to make a macro work as a single line if stmt without braces1Kaz Kylheku
22 Sep 24 i i i`* Re: how to make a macro work as a single line if stmt without braces6Keith Thompson
23 Sep 24 i i i `* Re: how to make a macro work as a single line if stmt without braces5David Brown
23 Sep 24 i i i  `* Re: how to make a macro work as a single line if stmt without braces4Richard Harnden
23 Sep 24 i i i   `* Re: how to make a macro work as a single line if stmt without braces3David Brown
23 Sep 24 i i i    `* Re: how to make a macro work as a single line if stmt without braces2Richard Harnden
23 Sep 24 i i i     `- Re: how to make a macro work as a single line if stmt without braces1David Brown
22 Sep 24 i i +- Modern text editor - 'bout time someone paid attention to keeping the thread title relevant!!! (Was: how to make a macro work as a single line if stmt without braces)1Kenny McCormack
22 Sep 24 i i `- Re: how to make a macro work as a single line if stmt without braces1David Brown
28 Sep 24 i `* Re: how to make a macro work as a single line if stmt without braces16Tim Rentsch
28 Sep 24 i  +* Re: how to make a macro work as a single line if stmt without braces5Michael S
29 Sep 24 i  i`* Re: how to make a macro work as a single line if stmt without braces4Tim Rentsch
29 Sep 24 i  i `* Re: how to make a macro work as a single line if stmt without braces3Michael S
30 Sep 24 i  i  +- Re: how to make a macro work as a single line if stmt without braces1Tim Rentsch
30 Sep 24 i  i  `- Re: how to make a macro work as a single line if stmt without braces1Alan Mackenzie
29 Sep 24 i  `* Re: how to make a macro work as a single line if stmt without braces10Andrey Tarasevich
29 Sep 24 i   `* Re: how to make a macro work as a single line if stmt without braces9Tim Rentsch
29 Sep 24 i    `* Re: how to make a macro work as a single line if stmt without braces8Andrey Tarasevich
29 Sep 24 i     +- Re: how to make a macro work as a single line if stmt without braces1Michael S
30 Sep 24 i     +* Re: how to make a macro work as a single line if stmt without braces3Keith Thompson
30 Sep 24 i     i`* Re: how to make a macro work as a single line if stmt without braces2Kaz Kylheku
30 Sep 24 i     i `- Re: how to make a macro work as a single line if stmt without braces1Janis Papanagnou
30 Sep 24 i     +- Re: how to make a macro work as a single line if stmt without braces1Tim Rentsch
30 Sep 24 i     +- Re: how to make a macro work as a single line if stmt without braces1Kaz Kylheku
30 Sep 24 i     `- Re: how to make a macro work as a single line if stmt without braces1David Brown
21 Sep 24 +* Re: how to make a macro work as a single line if stmt without braces2Bart
21 Sep 24 i`- Re: how to make a macro work as a single line if stmt without braces1Mark Summerfield
21 Sep 24 +* Re: how to make a macro work as a single line if stmt without braces2Ike Naar
21 Sep 24 i`- Re: how to make a macro work as a single line if stmt without braces1Keith Thompson
21 Sep 24 +* Re: how to make a macro work as a single line if stmt without braces2Tim Rentsch
22 Sep 24 i`- Re: how to make a macro work as a single line if stmt without braces1Keith Thompson
21 Sep 24 +- Re: how to make a macro work as a single line if stmt without braces1Andrey Tarasevich
21 Sep 24 `* Re: how to make a macro work as a single line if stmt without braces2Blue-Maned_Hawk
24 Sep 24  `- Re: how to make a macro work as a single line if stmt without braces1Tim Rentsch

Haut de la page

Les messages affichés proviennent d'usenet.

NewsPortal