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Use correct preprocessor conditional in relptr.h

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When relptr.h was added (commit fbc1c12a94), there was no check for
HAVE_TYPEOF, so it used HAVE__BUILTIN_TYPES_COMPATIBLE_P, which
already existed (commit ea473fb2de) and which was thought to cover
approximately the same compilers.  But the guarded code can also work
without HAVE__BUILTIN_TYPES_COMPATIBLE_P, and we now have a check for
HAVE_TYPEOF (commit 4cb824699e), so let's fix this up to use the
correct logic.

Co-authored-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://www.postgresql.org/message-id/CA%2BhUKGL7trhWiJ4qxpksBztMMTWDyPnP1QN%2BLq341V7QL775DA%40mail.gmail.com
This commit is contained in:
Peter Eisentraut
2025-12-13 19:56:09 +01:00
parent abb331da0a
commit 315342ffed
1 changed files with 4 additions and 12 deletions
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16
src/include/utils/relptr.h
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@@ -38,16 +38,12 @@
#define relptr_declare(type, relptrtype) \
typedef relptr(type) relptrtype
#ifdef HAVE__BUILTIN_TYPES_COMPATIBLE_P
#ifdef HAVE_TYPEOF
#define relptr_access(base, rp) \
(AssertVariableIsOfTypeMacro(base, char *), \
(__typeof__((rp).relptr_type)) ((rp).relptr_off == 0 ? NULL : \
(typeof((rp).relptr_type)) ((rp).relptr_off == 0 ? NULL : \
(base) + (rp).relptr_off - 1))
#else
/*
* If we don't have __builtin_types_compatible_p, assume we might not have
* __typeof__ either.
*/
#define relptr_access(base, rp) \
(AssertVariableIsOfTypeMacro(base, char *), \
(void *) ((rp).relptr_off == 0 ? NULL : (base) + (rp).relptr_off - 1))
@@ -72,16 +68,12 @@ relptr_store_eval(char *base, char *val)
}
}
#ifdef HAVE__BUILTIN_TYPES_COMPATIBLE_P
#ifdef HAVE_TYPEOF
#define relptr_store(base, rp, val) \
(AssertVariableIsOfTypeMacro(base, char *), \
AssertVariableIsOfTypeMacro(val, __typeof__((rp).relptr_type)), \
AssertVariableIsOfTypeMacro(val, typeof((rp).relptr_type)), \
(rp).relptr_off = relptr_store_eval((base), (char *) (val)))
#else
/*
* If we don't have __builtin_types_compatible_p, assume we might not have
* __typeof__ either.
*/
#define relptr_store(base, rp, val) \
(AssertVariableIsOfTypeMacro(base, char *), \
(rp).relptr_off = relptr_store_eval((base), (char *) (val)))