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From: Josh Marshall <joshua.r.marshall.1991@gmail.com>
Date: Mon, 28 Dec 2020 14:51:01 -0500
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Subject: Should reinterpret_cast be constexpr?
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Hello all,

>From the test error `libstdc++-v3/include/bits/stl_vector.h:1837: error:
'reinterpret_cast' is not a constant expression` and the documentation at
https://en.cppreference.com/w/cpp/language/reinterpret_cast , is
`reinterpret_cast()` not constexpr in error?