/* When checking is enabled, errors will be generated if a tree node is accessed incorrectly. The macros die with a fatal error. */ #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007) //... #define TREE_CHECK(T, CODE) \ (tree_check ((T), __FILE__, __LINE__, __FUNCTION__, (CODE)))
#else /* not ENABLE_TREE_CHECKING, or not gcc */ //... #define TREE_CHECK(T, CODE) (T)