Proposal: null conditional + lambda expression

[murtazadhari]

Hi, It would be good to have something like
home?=> new PlayerSummary(home)
for scenario
var h = home != null ? new HomeSummary(home) : null

so instead of writing ternary operator of if/else we could just write null conditional + return lambda expression.

var h = home?=> new HomeSummary(home).

Cheers
Ali, Murtaza

[stakx]

This could be covered by e.g. #1661.

[DavidArno]

@stakx,

The idea behind the likes of #1661 is that a ArgumentNullException` is thrown, which is orthogonal to this proposal.

Having said that, a proposal for shortcut syntax for only reassigning a value if it's not null is the complete opposite of "would be good to have". I just don't get why such logic would ever exist, much less want a shorthand way of expressing it.

[Joe4evr]

a proposal for shortcut syntax for only reassigning a value if it's not null is the complete opposite of "would be good to have"

Not to mention that OP's request can already be achieved in a different manner.

//Add method on your 'Home' type:
public HomeSummary CreateSummary() => new HomeSummary(this);

//Call like so
var h = home?.CreateSummary();

Problem solved, no new syntax necessary.

[stakx]

@DavidArno: #1661 is not about throwing an exception as you claim, but about skipping method execution if any one of the marked arguments is null. It says so in the very first sentence and in the example.

[jnm2]

See #433, as well as another duplicate, #842.