return a specified generic without passing a type?

playground.swift

//: Playground - noun: a place where people can play

import UIKit

var str = "Hello, playground"

struct VarType<T> {
    let name: String
    let val: T
}

class Container {
    let a: VarType<Int> = VarType<Int>(name: "a", val: 12)
    let b: VarType<Float> = VarType<Float>(name: "b", val: 1.2)
    let f: VarType<Bool> = VarType<Bool>(name: "f", val: true)
    let c: VarType<String> = VarType<String>(name: "c", val: "hi")

    func getVarNamed<T>(name: String) -> VarType<T> {
        switch name {
        case "a":
            return self.a
        case "b":
            return self.b
        case "c":
            return self.c
        default:
            return self.f
        }
    }
}