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Orthography fixes for new castNode() macro.

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Clean up hastily-composed comment.  Normalize whitespace.

Erik Rijkers and myself
This commit is contained in:
Tom Lane 2017-01-27 08:33:58 -05:00
parent 332068a212
commit ae145306ca
1 changed files with 9 additions and 9 deletions
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18
src/include/nodes/nodes.h
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@ -487,25 +487,25 @@ extern PGDLLIMPORT Node *newNodeMacroHolder;
#define IsA(nodeptr,_type_) (nodeTag(nodeptr) == T_##_type_)
/*
* castNode(type, ptr) casts ptr to type and, if cassert is enabled, verifies
* that the the c actually has the appropriate type (using it's nodeTag()).
* castNode(type, ptr) casts ptr to "type *", and if assertions are enabled,
* verifies that the node has the appropriate type (using its nodeTag()).
*
* Use an inline function when assertions are enabled, to avoid multiple
* evaluations of the ptr argument (which could e.g. be a function call). If
* inline functions are not available - only a small number of platforms -
* evaluations of the ptr argument (which could e.g. be a function call).
* If inline functions are not available - only a small number of platforms -
* don't Assert, but use the non-checking version.
*/
#if defined(USE_ASSERT_CHECKING) && defined(PG_USE_INLINE)
static inline Node*
castNodeImpl(enum NodeTag type, void *ptr)
static inline Node *
castNodeImpl(NodeTag type, void *ptr)
{
Assert(ptr == NULL || nodeTag(ptr) == type);
return ptr;
return (Node *) ptr;
}
#define castNode(_type_, nodeptr) ((_type_ *) castNodeImpl(T_##_type_, nodeptr))
#else
#define castNode(_type_,nodeptr) ((_type_ *)(nodeptr))
#endif
#define castNode(_type_, nodeptr) ((_type_ *) (nodeptr))
#endif /* USE_ASSERT_CHECKING && PG_USE_INLINE */
/* ----------------------------------------------------------------