Add "null conditional operator" ?.

[JamesFaix]

C# 6 and VB 14 have a new operator called the "null conditional operator", represented as ?. or ?[. https://msdn.microsoft.com/en-us/library/dn986595.aspx

The ?. version is used when trying to dereference a member of an object that may be null. For example,
var name = someObject?.Name;
assigns to the variable name either the name of someObject, or null if someObject is null.

The ?[ version is used when trying to access an array element of an array that may be null. For example,
var item = someArray?[3];
assigns to the variable item either the item at index in someArray, or null if someArray is null.

I would really love a ligature for ?.. I think the period should ideally be spaced the same as the bottom of the 2nd question mark in the ?? ligature.

A ligature for ?[ should probably be added for symmetry.

[krux02]

I would say yes to ?. but no to ?[. I just don't see what a ligature can improve on the appearance. But also concider, this operator is implemneted differently in different programming languages:

Ruby: &.
Perl6: .?

https://en.wikipedia.org/wiki/Safe_navigation_operator

[JamesFaix]

@krux02 I agree that ?[ would not be improved much by ligaturization. I also did not know how widely such an operator was available, thanks for the link. "Safe navigation" is a way better name than "null conditional" also. Microsoft naming..ugh.

[kosiakk]

Certainly, dots in Elvis operator ?: and in Pirate Elvis operator ?. should all be of the same size. Currently they aren't, so my Kotlin code looks less perfect.

[kosiakk]

The first line is the current version, 1.201 rendered in Idea.

The second line is my suggestion:

1. Original version: dots are different and not aligned
2. Two dots under ?. are copied directly from .. ligature, including the spacing.
   Semicolon dots are made bigger (ugly)
3. Minimal change - just the spacing is adjusted. All glyphs are original.
   Smaller dot highlights the secondary role of ? in this ligature.
4. All dots are taken from the question mark and are too small.
5. I guess, the best would be take the dot from : glyph - its size fits perfectly in between.
   Cons: the importance of . is lost a bit, and it might look misaligned in the long().chainOf()?.calls()