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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Eisentraut <peter@eisentraut.org>
Cc: Nazir Bilal Yavuz <byavuz81@gmail.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: C11 / VS 2019
Date: Mon, 07 Jul 2025 12:01:19 -0400
Message-ID: <399300.1751904079@sss.pgh.pa.us> (raw)
In-Reply-To: <04ab76a3-186c-4a37-8076-e6882ebf9d43@eisentraut.org>
References: <01a69441-af54-4822-891b-ca28e05b215a@eisentraut.org>
	<aD2sgK4tMVumNxt4@nathan>
	<aD5_OiEKEz2RpYFR@paquier.xyz>
	<b4af1f32-f90f-4670-9598-029e99b69f31@eisentraut.org>
	<e5488fe3-38d5-4b1f-ae0d-a254dc969f16@eisentraut.org>
	<90506.1751754464@sss.pgh.pa.us>
	<46154df9-f514-4d79-89bb-df4af46b1b9f@eisentraut.org>
	<CAN55FZ03ZXUFsxiyR0hzFsrYG-jbQzt8=uoC8b16THu3kU92fg@mail.gmail.com>
	<387476.1751897627@sss.pgh.pa.us>
	<04ab76a3-186c-4a37-8076-e6882ebf9d43@eisentraut.org>

Peter Eisentraut <peter@eisentraut.org> writes:
> On 07.07.25 16:13, Tom Lane wrote:
>> Huh.  Can we trawl the release notes for VS and see if this was
>> acknowledged as a bug fix, and if so when did it happen?

> But this one [0] seems to indicate you might need at least 16.5 for this.

Ah, that says

    Starting in Visual Studio 2019 version 16.5, preprocessor support
    for the C++20 standard is feature-complete. These changes are
    available by using the /Zc:preprocessor compiler switch.

The reference to C++20 is a bit confusing in this context; does C++
really have a different preprocessor?  But anyway, the support matrix
seems like a convincing argument that we don't have to support 16.3.
If Andrew is willing to update drongo, I'm content to leave it at
that.

			regards, tom lane





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