Provide and use an alternative implementation of unsafe_declval (boos…

…torg#216)

References boostorg#208

Update copyright years

Update copyright years

Fix clang-tidy warnings

Fix clang-tidy warnings

Workaround MSVC bogus warning (fixes boostorg#167)

Workaround MSVC bogus warning (fixes boostorg#167)

Get rid of cast_to_layout_compatible (boostorg#154)

Get rid of cast_to_layout_compatible (boostorg#154)

Fix `get_name` on clang for MSVC (boostorg#149)