Is there an “opposite” to the null coalescing operator? (…in any language?)

Question

null coalescing translates roughly to return x, unless it is null, in which case return y

I often need return null if x is null, otherwise return x

Answer 1

This is being added in C# vNext (Roslyn powered C#, releases with Visual Studio 2014).

It is called Null propagation and is listed here as complete. https://roslyn.codeplex.com/wikipage?title=Language%20Feature%20Status

It is also listed here as complete: https://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/3990187-add-operator-to-c