ruby--ruby/include/ruby/assert.h

#ifndef RUBY_ASSERT_H
#define RUBY_ASSERT_H

#if defined(__cplusplus)
extern "C" {
#if 0
} /* satisfy cc-mode */
#endif
#endif

NORETURN(void rb_assert_failure(const char *, int, const char *, const char *));
#ifdef RUBY_FUNCTION_NAME_STRING
# define RUBY_ASSERT_FAIL(expr) \
    rb_assert_failure(__FILE__, __LINE__, RUBY_FUNCTION_NAME_STRING, expr)
#else
# define RUBY_ASSERT_FAIL(expr) \
    rb_assert_failure(__FILE__, __LINE__, NULL, expr)
#endif
#define RUBY_ASSERT_MESG(expr, mesg) \
    ((expr) ? (void)0 : RUBY_ASSERT_FAIL(mesg))
#ifdef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \
    ((RUBY_DEBUG+0) ? RUBY_ASSERT_MESG((expr), mesg) : \
    __builtin_choose_expr( \
        __builtin_constant_p(cond), \
        __builtin_choose_expr(cond, RUBY_ASSERT_MESG(expr, mesg), (void)(expr)), \
        RUBY_ASSERT_MESG(!(cond) || (expr), mesg)))
#else
# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \
    RUBY_ASSERT_MESG(!((RUBY_DEBUG+0) || (cond)) || (expr), mesg)
#endif
#define RUBY_ASSERT(expr) RUBY_ASSERT_MESG_WHEN((!RUBY_NDEBUG+0), expr, #expr)
#define RUBY_ASSERT_WHEN(cond, expr) RUBY_ASSERT_MESG_WHEN(cond, expr, #expr)
#define RUBY_ASSERT_ALWAYS(expr) RUBY_ASSERT_MESG_WHEN(TRUE, expr, #expr)

#ifndef RUBY_DEBUG
# define RUBY_DEBUG 0
#endif
#ifndef RUBY_NDEBUG
# ifdef NDEBUG
#   define RUBY_NDEBUG 1
# else
#   define RUBY_NDEBUG 0
# endif
#endif

#if defined(__cplusplus)
#if 0
{ /* satisfy cc-mode */
#endif
}  /* extern "C" { */
#endif

#endif