Re: [boost][int128] Formal Review Begins Today (July 22-July 31)

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Two questions that I have been asked in different forums already that are =
worth sharing with the list:

"What's the point when _BitInt is coming?" =



_BitInt is coming perhaps in C++29. _BitInt(N) is also optional for all N =
> 64 so there are no guarantees you will have _BitInt(128) on any given pl=
atform. This requires only C++14 and is tested all the way back to GCC 5, =
Clang 5, MSVC 14.1.

"also doesn't gcc/clang support __in128? and msvc has std::_Int128?"

GCC/Clang support __int128 only on 64-bit platforms and also not on Window=
s. MSVC has std::_int128, but it is completely undocumented.

Basically if you need to write portable code that requires 128-bit integer=
s this will work regardless of toolchain and architecture today.

Matt
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