Determining type of literal

[Binto86]

Sometimes you need to tell the compiler what exact type is your literal or what encoding does your string use, like in this example:

var x = 0.0; //now x is by defalut float64, but what if i want it to be float32?
var y = "hello"; //what if i want my string to be UTF 16?

Clasical sproach used by many languages is to introduce literal sufixes and prefixes like this:

var x = 0; //x is int32 by defalut
var y = 0f; //now y is specified to be float32
var z = u8"hello"; //z is now UTF 8 encoded

Other option would be type hinting (proposed in issue #74)
Consider this example:

var x = 0; //x is int32 by defalut
var y = 0: uint16; //now y is specified to be uint16
var z = "hello": u8string; //z is now UTF 8 encoded

Note that this is only valid for literals, so the folowing would result in error.

var x = 0;
var y = x: uint16;