letatas

@dynamicMemberLookup
struct Template {
    var template : String
    private var data : [String:String]
    var populatedTemplate : String { data.reduce(template) { $0.replacingOccurrences(of: "${\($1.key)}", with: $1.value) } }

    init(template: String, data: [String:String] = [:]) {
        self.template = template
        self.data = data
    }