#define DEFAULT_NUM_WORKSPACES 1
#define DEFAULT_WORKSPACE_CHANGE_ANIMATION_LENGTH 200
-#ifndef static_assert
-#define static_assert(cond, msg)
-#endif
-
struct focus_state {
struct desktop_shell *shell;
struct weston_seat *seat;
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif
+/**
+ * Build-time static assertion support
+ *
+ * A build-time equivalent to assert(), will generate a compilation error
+ * if the supplied condition does not evaluate true.
+ *
+ * The following example demonstrates use of static_assert to ensure that
+ * arrays which are supposed to mirror each other have a consistent
+ * size.
+ *
+ * This is only a fallback definition; support must be provided by the
+ * compiler itself.
+ *
+ * @code
+ * int small[4];
+ * long expanded[4];
+ *
+ * static_assert(ARRAY_LENGTH(small) == ARRAY_LENGTH(expanded),
+ * "size mismatch between small and expanded arrays");
+ * for (i = 0; i < ARRAY_LENGTH(small); i++)
+ * expanded[i] = small[4];
+ * @endcode
+ *
+ * @param condition Expression to check for truth
+ * @param msg Message to print on failure
+ */
+#ifndef static_assert
+# ifdef _Static_assert
+# define static_assert(cond, msg) _Static_assert(cond, msg)
+# else
+# define static_assert(cond, msg)
+# endif
+#endif
+
#ifdef __cplusplus
}
#endif
#include "shared/helpers.h"
#include "libweston-desktop/libweston-desktop.h"
-#ifndef static_assert
-#define static_assert(cond, msg)
-#endif
-
struct desktest_shell {
struct wl_listener compositor_destroy_listener;
struct weston_desktop *desktop;