You might like Apple's Swift:

    class Example {
        let ExtraMul = 5
    }

    let weakly = Example()
    let squareAndABit : Int -> Int = { [weak weakly] in $0 * $0 * weakly!.ExtraMul }
    squareAndABit(2) // 20

Positional lambda arguments, implicit returns for single expression arguments, capture lists if you want to alter the default capture mode. It's got really rather nice first class function support.