diff options
Diffstat (limited to 'src/include/nodes/nodes.h')
| -rw-r--r-- | src/include/nodes/nodes.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h index c8ed4e05524..cdd6debfa0e 100644 --- a/src/include/nodes/nodes.h +++ b/src/include/nodes/nodes.h @@ -66,6 +66,11 @@ typedef enum NodeTag * * - special_read_write: Has special treatment in outNode() and nodeRead(). * + * - nodetag_number(VALUE): assign the specified nodetag number instead of + * an auto-generated number. Typically this would only be used in stable + * branches, to give a newly-added node type a number without breaking ABI + * by changing the numbers of existing node types. + * * Node types can be supertypes of other types whether or not they are marked * abstract: if a node struct appears as the first field of another struct * type, then it is the supertype of that type. The no_copy, no_equal, and |