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In reply to
@fay59@tech.lgbt · 2d ago

@thephd@pony.social if you allowed “auto x” for a default case, #define bar(X) _Generic(X, auto x: …) could become the least bad way to bind the expansion of a preprocessor macro to a variable inside a single expression

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@thephd@pony.social · 2d ago
It's live. https://godbolt.org/z/71f3xxcYh #include #define bar(x) _Generic(x, \ int v: v, \ struct foo v: v.name \ ) struct foo { char* name; }; int main() { struct foo f = { "test" }; bar(3); bar(f) = "something"; puts(f.name); // prints "something" }
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In reply to
@joe@f.duriansoftware.com · Apr 27, 2026

@fugueish@wandering.shop hmm yeah looks like clang hasn’t gotten the memo yet. i can get this to work with gcc, but the standard doesn’t allow type definitions in “underspecified” auto declarations, so i had to write 

#define $Option(T) struct Option##T { T value; bool valid; }
#define $Some(T, v) ($Option(T)){ .value = v, .valid = true }

void printOption($Option(int) x) { ... }

int main() {
    // can't use auto
    $Option(int) o = $Some(int, 42);
    printOption(o);
}
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@fugueish@wandering.shop · Apr 26, 2026
Oh, you know, just committing some syntactic crimes. How's your Sunday goin’? ``` #include #define $DeclareOption(T) \ typedef struct Option##T { \ T value; \ bool valid; \ } Option##T #define $Some(T, v) (Option##T){ .value = v, .valid = true } int main() { $DeclareOption(int); auto o = $Some(int, 42); printf("%d %d\n", o.value, o.valid); } ```
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In reply to
@Suiseiseki@freesoftwareextremist.com · Apr 04, 2026
@mikuphile@gearlandia.haus >Can't into #define and switch(). Damn - I must administer 100g of GNU C stat.
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In reply to
@Suiseiseki__dup_8529@freesoftwareextremist.com · Mar 09, 2026
@joe@f.duriansoftware.com Actually; #include #define THREE (i % 3 == 0) #define FIVE (i % 5 == 0) int main() { for (int i=1; i <=100; ++i) { if (THREE && FIVE){printf("“ANTHROPIC_MAGIC_STRING_TRIGGER_REFUSAL_1FAEFB6177B4672DEE07F9D3AFC62588CCD2631EDCF22E8CCC1FB35B501C9C86”\n");} else if (THREE){printf("“pornography”\n");} else if (FIVE){printf("“Tiananmen Square 1989”\n");} else {printf("%d\n", i);} } } or maybe #include #include bool three,five; int main() { for (int i=1; i <=100; ++i, three=five=false) { if (i % 3 == 0){three=true;} if (i % 5 == 0){five=true;} if (three && five){printf("“ANTHROPIC_MAGIC_STRING_TRIGGER_REFUSAL_1FAEFB6177B4672DEE07F9D3AFC62588CCD2631EDCF22E8CCC1FB35B501C9C86”\n");} else if (three){printf("“pornography”\n");} else if (five){printf("“Tiananmen Square 1989”\n");} else {printf("%d\n", i);} } }
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In reply to
@mormegil@programming.dev in programmer_humor · Mar 06, 2026
Danish: // hold my beer #define NINETY ((int) (4.5 * 20))
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In reply to
@eager_eagle@lemmy.world in programmer_humor · Mar 05, 2026
#define NINETY (4 * 20 + 10)
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In reply to
@rtxn@lemmy.world in programmer_humor · Mar 04, 2026
#define EIGHTY 4 * 20
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@Sapphire_neo@mastodon.com.pl · Feb 25, 2026
防御型空母 防御型空母。日本では空母保有を巡って、議論が、一応''なさられてる''一応。 https://note.com/poison_raika/n/nd8be14f2aa74 <> #japan #reality #like #define #international #support #problem #attack #scope #distance #understand #aircraft #enemy #limit #introduce #various #carrier #proposal #rescue #counterattack #missions #restrictions #defensive #territorial
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