Am Sonntag, den 12.03.2006, 11:38 +0100 schrieb Václav Veselý:
Hi,
There is a common need of getting a value from an optional with possibility to define a default value in case of the optional is uninitialized. I suggest two alternatives:
I recently had this need too. Modern C++ also means clean and nice-looking code, IMHO. So we need this! I am really posting only to this relatively old thread because I find the need real and stumbled upon it very recently.
optional<int> o; int i = o.get(123); // a meber function get with an additional parameter int j = from_optional(o, 123); // a free function
Both alternatives can be implemented simultaneously.
What do you think about it?
I'd prefer a member function because I also don't like free functions like "get". I'd rather write x.template foo. A nice method name would be get_with_default. The alternative get_or_default is hardly readable. Just with_default would be fine for me, too.
Regards, Vaclav
Aristid
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