#ifndef VLIBC_ASSERT_H
#define VLIBC_ASSERT_H

/*
 * vlibc — <assert.h>.
 *
 * The assert diagnostic macro. When NDEBUG is defined the macro expands to
 * ((void)0) and the expression is not evaluated; otherwise a false result
 * calls the library-internal __vlibc_assert_fail(), which writes the
 * diagnostic to fd 2 through the raw syscall layer and terminates the
 * process with __builtin_trap(). The helper deliberately does not depend on
 * abort(), exit() or stdio: those land in later todos, and an assertion
 * failure must work even when the runtime is half-initialized.
 *
 * static_assert is a C23 keyword; for C17 and older this header maps it onto
 * _Static_assert, and _Static_assert itself remains usable in every mode.
 *
 * This header is ISO C core and is present in every profile.
 */

#include <vlibc/features.h>

/* NDEBUG: strip the check entirely, matching the standard. */
#ifdef NDEBUG
#define assert(expr) ((void)0)
#else
/*
 * Terminate after writing the failing assertion to fd 2; never returns.
 * Implemented in src/internal/assert_fail.c. The name sits in the
 * implementation-reserved namespace because it is libc plumbing, not
 * public API.
 */
__attribute__((noreturn)) void
__vlibc_assert_fail(const char *expr, const char *file,
                    int line, // NOLINT(bugprone-reserved-identifier)
                    const char *func);

#define assert(expr) ((expr) ? (void)0 : __vlibc_assert_fail(#expr, __FILE__, __LINE__, __func__))
#endif

#if !defined(__cplusplus) && (!defined(__STDC_VERSION__) || __STDC_VERSION__ < 202311L)
#define static_assert _Static_assert
#endif

#endif /* VLIBC_ASSERT_H */