#define BUFFER_TREE_ERRORS \
PARA_ERROR(BTR_EOF, "buffer tree: end of file"), \
PARA_ERROR(BTR_NO_CHILD, "btr node has no children"), \
+ PARA_ERROR(BTR_NAVAIL, "btr node: value currently unavailable"), \
#define STDOUT_ERRORS \
PARA_ERROR(STDOUT_EOF, "stdout: end of file"), \