Reference next value in stencil template loop

[danielsinclairtill]

Question

Is there a way to reference the current and the next variable in a stencil template for loop?

example:

{% for variable in type.allVariables %} 
current var: {{variable.name}}
next var: {{forloop.nextValue.name}} // reference next value in loop
{% endfor %}

Context

I am trying to make a template to auto generate a Step Builder pattern like the example below.
I would require to have a reference to the next variable name in the for loop to correctly define the next protocol return type.

Source Input:

struct Person {
    var name: String = ""
    var age: Int = 0
}

Template:

{% for variable in type.allVariables %}
protocol {{type.name}}{{variable.name|upperFirstLetter}}Step {
    func set{{variable.name|upperFirstLetter}}(_ {{variable.name}}: {{variable.typeName}}) -> {{type.name}}{{forloop.nextValue.name|upperFirstLetter}}Step
}
{% endfor %}

Expected Builder Output:

protocol PersonNameStep {
    func setName(_ name: String) -> PersonAgeStep
}

protocol PersonAgeStep {
    func setAge(_ age: Int) -> PersonBuildStep
}

Rest of code:

protocol PersonBuildStep {
    func build() -> Person
}

class PersonBuilder: PersonNameStep, PersonAgeStep, PersonBuildStep {
    var person = Person()

    func setName(_ name: String) -> PersonAgeStep {
        person.name = name
    }
    ...
}