Feature Request: A string! macro for declaring new Owned Strings from parameter.

[WebeWizard]

I think it would make a good sibling to vec! . I say so because I'd like consistency when declaring new vector based types. Also, stringify! returns a string slice.
let mystring: String = My String".to_string(); is reasonable, but to my knowledge there is no [ 1 , 2 , 3 ].to_vec()

[japaric]

This doesn't seem relevant anymore (perhaps this was opened when we were in the ~str -> String flux?). Today you can create String/Vec in several ways:

[1, 2, 3].to_vec!() == vec![1, 2, 3];
format!("Hello") == "Hello".to_string();

I think this should be closed.

cc @alexcrichton

[japaric]

Or in any case, adding a new macro to stdlib should go through the RFC processs

[WebeWizard]

I'll close it. Thanks.