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fa16e7fd84
This reverts commit f0f2c0c1ae.
The original problem that led to the use of pg_restrict was that MSVC
couldn't handle plain restrict, and defining it to something else
would conflict with its __declspec(restrict) that is used in system
header files. In C11 mode, this is no longer a problem, as MSVC
handles plain restrict. This led to the commit to replace pg_restrict
with restrict. But this did not take C++ into account. Standard C++
does not have restrict, so we defined it as something else (for
example, MSVC supports __restrict). But this then again conflicts
with __declspec(restrict) in system header files. So we have to
revert this attempt. The comments are updated to clarify that the
reason for this is now C++ only.
Reported-by: Jelte Fennema-Nio <postgres@jeltef.nl>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://www.postgresql.org/message-id/CAGECzQRoD7chJP1-dneSrhxUJv%2BBRcigoGOO4UwGzaShLot2Yw%40mail.gmail.com