NAME¶

SDL_enabled_assert - The macro used when an assertion is enabled.

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_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)

DESCRIPTION¶

This isn't for direct use by apps, but this is the code that is inserted when an SDL_assert is enabled.

The do {} while(0) avoids dangling else problems:

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

... without the do/while, the "else" could attach to this macro's "if". We try to handle just the minimum we need here in a macro...the loop, the static vars, and break points. The heavy lifting is handled in SDL_ReportAssertion().

MACRO PARAMETERS¶

condition

the condition to assert.

AVAILABILITY¶

This macro is available since SDL 3.2.0.