Re: const attribute makes whole element const?

[monarch_dodra]

On Saturday, 8 September 2012 at 23:18:14 UTC, Timon Gehr wrote:
On 09/09/2012 01:16 AM, Namespace wrote:
Why fail this code?
without "const" on "Name" it works fine.
http://dpaste.dzfl.pl/9fa0986a

const fields cannot be written to. This includes the case when 
the
entire struct is written to at once.

That doesn't make sense to me either. Why would the entire 
"tests[4]" be immutable? If I were to define CC and opAssign, 
then why is there still a problem?

Further more, changing from Associative Array to raw array solves 
the problem.

This is a strange behavior for AAs.

void main() {
    struct Test {
        const string Name;

        this(string name) {
            this.Name = name;
        }

        this(Test other)
        {}

        void opAssign(Test other)
        {}
    }

    Test[string] tests;
    Test t2 = Test("FooBar");
    Test t3;
    t3 = t2;
    auto t4 = tests[4];
    tests[4] = t4;
}