SDL_enabled_assert(3)

💅 SDL_enabled_assert — the macro that shows up when an assertion is ON

okay bestie, quick vibe check: this is SDL_enabled_assert, a function from the SDL3 FUNCTIONS cinematic universe 🌈. Sit down, grab a strawberry 🍓, and let's get into it.

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✨ NAME ✨

SDL_enabled_assert — the macro used when an assertion is enabled.

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🦋 SYNOPSIS 🦋

#include <SDL3/SDL_assert.h>

#define SDL_enabled_assert(condition) \
    do { \
        while ( !(condition) ) { \
            static struct SDL_AssertData sdl_assert_data = { false, 0, #condition, NULL, 0, NULL, NULL }; \
            const SDL_AssertState sdl_assert_state = SDL_ReportAssertion(&sdl_assert_data, SDL_FUNCTION, SDL_ASSERT_FILE, SDL_LINE); \
            if (sdl_assert_state == SDL_ASSERTION_RETRY) { \
                continue; /* go again. */ \
            } else if (sdl_assert_state == SDL_ASSERTION_BREAK) { \
                SDL_AssertBreakpoint(); \
            } \
            break; /* not retrying. */ \
        } \
    } while (SDL_NULL_WHILE_LOOP_CONDITION)

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💖 DESCRIPTION 💖

so like — this isn't for direct use by apps 🙈, it's literally just the code that gets inserted when an SDL_assert is enabled. Not your business to call, but VERY much your business to understand, iykyk.

the do {} while(0) is there to avoid dangling else problems, and honestly? iconic behavior. it's giving:

if (x) SDL_assert(y); else blah();

...without the do/while, that else could attach itself to this macro's if 😭 and that would be a whole mess. no thanks!

the philosophy here is: handle just the minimum we need in a macro — the loop, the static vars, and break points. all the heavy lifting is handled in SDL_ReportAssertion(). macro stays lightweight, the real one does the work. main character energy fr fr 👑

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🎀 MACRO PARAMETERS 🎀

• condition — the condition to assert. that's it. that's the whole parameter. slay.

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⭐ AVAILABILITY ⭐

this macro is available since SDL 3.2.0. no cap.

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💀 reminder bestie: this is internal-ish machinery. the docs say it isn't for direct use by apps, so don't go calling it in your own code and then act surprised. 💅

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and that's the whole page, periodt 🫶

sign-off time: brought to you by Simple Directmedia Layer 🌸, SDL 3.4.18, and this very page, SDL_enabled_assert(3). mwah 💖