That's a good point actually, very open to discussion on lots of things.

The main usecase is that I need quite often to do something like +1 or *10 and having to write {{count|add:1}} feels really wrong to me.

Maybe having only simple math would be better?

Opened https://github.com/Keats/tera/issues/22 if people want to write some input

Do you know if the quote escape is still required with C# 6 interpolation?

C#6 string interpolation is glorious, but if you use the multiline

    var myString = $@"
    Hey, string interpolation is nifty.
    Look ma, no { this.Hands.ToString().ToUpper() }
    More text.
    But this is a ""quote"".  It's ""ugly"" isn't it?
    ";

As you can see, you need to double your double quotes to escape them. Almost perfect. You can even nest string interpolations to do next template stuff with functional-programming loops and whatnot.

Scala seems to do what you want:

    val str = s"""
      Tripe quoted string interpolation
      Allows for $variables and ${method.foo(bar)}
      Mixed with "quotes" 
    """

Can also use double quoted string interpolation for inline/one-liners where embedded quotes above aren't needed.

Neat! With facilities like that, Id be tempted to skip templating libraries altogether and just have a normal interface for templates and use the regular string expressions... Unless I needed then internationalized, and that's where Mustache shines, IMHO.

F# can have quotes inside triple-quoted string like Scala, sans interpolation.