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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89237] Partial specialization incorrectly marked as ambiguous
Date: Tue, 14 Dec 2021 03:32:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D89237

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
ICC also rejects it with the same message as GCC even.

MSVC rejects it with:
<source>(9): error C2794: 'type': is not a member of any direct or indirect
base class of 'enable_if<false,void>'
<source>(9): warning C4305: 'specialization': truncation from 'size_t' to
'bool'



If I change "sizeof(T)" to "sizeof(T)!=3D0" as what I thought the conversion
would be, then clang rejects it with the same error as GCC.

So I suspect it is rejecting the specialization due to the conversion from
size_t to bool which I thought I had saw a bug about that.=