REGISTER_ASSERT_HANDLER(3alleg4)

💖 NAME 💖

register_assert_handler — bestie, this one registers a custom handler for assert failures, and it lives in the Allegro game programming library. Yes, the whole page is from the Allegro manual, section 3alleg4, and it's short but it slaps. 🦋

✨ SYNOPSIS ✨

#include <allegro.h>

void register_assert_handler(int (*handler)(const char *msg));

🌸 DESCRIPTION 🌸

So here's the vibe: you're handing Allegro a custom handler function of your very own to deal with assert failures. Iconic of you, honestly. 💅

Your callback gets passed a formatted error message in ASCII — cute, classic, no drama — and here's the part where the return value is doing the heavy lifting:

• return non-zero if your handler has processed the error (you handled it, girl, you ate 🍓)
• return zero to continue with the default actions (letting Allegro do its thing)

What's this even for? A couple of extremely valid use cases, no cap:

• ignoring assert failures entirely 🙈
• displaying the error messages on a graphics mode screen without aborting the program — which is the moment, honestly, because nobody wants their whole program to just die mid-render 😭

And the lil cherry on top: you can call this function even when Allegro has not been initialised. It doesn't need Allegro to be awake first. Lowkey obsessed with that. ✨

Example, because we love a demonstration:

int show_but_continue(const char *text)
{
    alert("Uh oh...", "Fasten your seat belts.", text,
          "&Go on!", NULL, 'g', 0);
    return 1;
}
...
   register_assert(show_but_continue);
   ASSERT(0); /* This won't crash the program now. */

See how it returns 1? That's the "I got this, we're not crashing today" energy. 👑

🌈 SEE ALSO 🌈

• al_assert(3alleg4)
• ASSERT(3alleg4)
• register_trace_handler(3alleg4)

Okay that's the whole page, bestie — go forth and handle those asserts like the main character you are. 💜 This was the register_assert_handler(3alleg4) page from the Allegro manual, version 4.4.3. Mwah, slay, periodt. 🎀🫶