Scott McMurray 44b4ce1d61 Make ZST checks in core/alloc more readable ... There's a bunch of these checks because of special handing for ZSTs in various unsafe implementations of stuff. This lets them be `T::IS_ZST` instead of `mem::size_of::<T>() == 0` every time, making them both more readable and more terse. *Not* proposed for stabilization at this time. Would be `pub(crate)` except `alloc` wants to use it too. (And while it doesn't matter now, if we ever get something like 85836 making it a const can help codegen be simpler.)		2022-09-22 23:12:29 -07:00
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macros.rs	Make ZST checks in core/alloc more readable	2022-09-22 23:12:29 -07:00