turn `ManuallyDrop::new` into a constant function#50148

Merged

bors merged 2 commits intorust-lang:masterfrom

japaric:const-manuallydrop

May 9, 2018

Commits on Apr 21, 2018

turn `ManuallyDrop::new` into a constant function
japaric
committed

Commits on May 7, 2018

make the const constructor unstable
japaric
committed