Taking target-typed new expressions further

[shawnshaddock]

With the new target-typed new expressions, would it be possible to also drop the new keyword and just use type initializers? This would call the parameterless constructor.

//Current syntax
PrintCustomer(new Customer { FirstName = "Scott", LastName = "Hunter" });

//C# 9 syntax
PrintCustomer(new { FirstName = "Scott", LastName = "Hunter" });

//Proposed syntax
PrintCustomer({ FirstName = "Scott", LastName = "Hunter" });

This would be especially great when initializing nested types

PrintCustomer(
{
    FirstName = "Scott",
    LastName = "Hunter",
    Address =
    {
        Street = "One Microsoft Way",
        City = "Redmond"
    }
});

[HaloFour]

That would be a breaking change as an object initializer can already omit new in order to initialize an existing instance:

public class Person {
    public Address Address { get; set; } = new Address();
}

public class Address {
    public string Street { get; set; }
    public string State { get; set; }
}

public class C {
    public void M() {
        // initializes Person with a new instance of Address
        var person1 = new Person {
            Address = new() { // equiv to new Address()
                Street = "123 Main St.",
                State = "NY"
            }
        };
        
        // initializes Person using the existing instance of Address
        var person2 = new Person {
            Address = {
                Street = "123 Main St.",
                State = "NY"
            }
        };
    }
}

[shawnshaddock]

I wasn't aware of that behavior, thanks for pointing that out