Re: Make copyObject work in C++

Peter Eisentraut <peter@eisentraut.org>

From: Peter Eisentraut <peter@eisentraut.org>

To: Tom Lane <tgl@sss.pgh.pa.us>, Jelte Fennema-Nio <postgres@jeltef.nl>

Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Thomas Munro <thomas.munro@gmail.com>

Date: 2025-12-08T08:00:55Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Enable test_cplusplusext with MSVC
- c05ad248f99c 19 (unreleased) landed
Disable some C++ warnings in MSVC
- 82a7cbea747c 19 (unreleased) landed
meson: Make room for C++-only warning flags for MSVC
- 4c83f1253593 19 (unreleased) landed
Make fixed-length list building macros work in C++
- f8e7ca328510 19 (unreleased) landed
Make unconstify and unvolatize use StaticAssertVariableIsOfTypeMacro
- 258248d0bdbf 19 (unreleased) landed
Use typeof everywhere instead of compiler specific spellings
- e2308350c9b7 19 (unreleased) landed
Test List macros in C++ extensions
- 3d28ecb5ac76 19 (unreleased) landed
Test most StaticAssert macros in C++ extensions
- 451650eaacd5 19 (unreleased) landed
Fix for C++ compatibility
- b4555cb070f1 19 (unreleased) landed
tests: Add a test C++ extension module
- 476b35d4e311 19 (unreleased) landed

On 07.12.25 20:45, Tom Lane wrote:
> Hmm, this only fixes the one use-case.  Admittedly we have only one
> use-case, but as soon as we have another we'll have a new problem.
> How about instead modifying the macro?  Maybe something like this
> in c.h (untested):
> 
> #ifdef __cplusplus
> #undef typeof
> #define typeof decltype
> #define HAVE_TYPEOF 1
> #endif

AFAICT, both gcc and clang support typeof in C++ mode as well.  So this 
kind of renaming could be confusing.