Struct initialization
=====================

How to initialize structs without `{` and `}` ?

Options for the enclosing syntax:

* Use [], like for arrays, but with designated initialization of fields.
* Use some keywords, for example `struct` and `end`

Options for initialization:

* Use <-
* Use =
* Use :

Syntax test:

    Point p1 = [
        x = 12
        y = 34
    ]

    Point p2 <- [
        x = 12
        y = 34
    ]

    Point p3 <- [
        x <- 12
        y <- 34
    ]

    Point p4 <- [
        x: 12
        y: 34
    ]

    Point p5 <- struct
        x <- 12
        y <- 34
    end


Best syntax?

    Point p4 <- [
        x: 12
        y: 34
    ]