From 8f0530f58061b185dc385df42e62d78a18d4ae3e Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Mon, 10 Apr 2017 13:51:29 -0400 Subject: Improve castNode notation by introducing list-extraction-specific variants. This extends the castNode() notation introduced by commit 5bcab1114 to provide, in one step, extraction of a list cell's pointer and coercion to a concrete node type. For example, "lfirst_node(Foo, lc)" is the same as "castNode(Foo, lfirst(lc))". Almost half of the uses of castNode that have appeared so far include a list extraction call, so this is pretty widely useful, and it saves a few more keystrokes compared to the old way. As with the previous patch, back-patch the addition of these macros to pg_list.h, so that the notation will be available when back-patching. Patch by me, after an idea of Andrew Gierth's. Discussion: https://postgr.es/m/14197.1491841216@sss.pgh.pa.us --- src/backend/commands/tablecmds.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/backend/commands/tablecmds.c') diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index 60f8b7f26c5..abb262b851c 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -5942,7 +5942,7 @@ ATExecSetIdentity(Relation rel, const char *colName, Node *def, LOCKMODE lockmod foreach(option, castNode(List, def)) { - DefElem *defel = castNode(DefElem, lfirst(option)); + DefElem *defel = lfirst_node(DefElem, option); if (strcmp(defel->defname, "generated") == 0) { @@ -9547,7 +9547,7 @@ ATPostAlterTypeParse(Oid oldId, Oid oldRelId, Oid refRelId, char *cmd, querytree_list = NIL; foreach(list_item, raw_parsetree_list) { - RawStmt *rs = castNode(RawStmt, lfirst(list_item)); + RawStmt *rs = lfirst_node(RawStmt, list_item); Node *stmt = rs->stmt; if (IsA(stmt, IndexStmt)) -- cgit v1.2.3