Code Generation

General Usage
1

I have a question which I am having trouble figuring out.

assume I have the following function
gentype() = PP

assume I have a type as QQ{MM{gentype(){LL{Int}},Z}, NN{LL{Z}}} I want to transform it to another type
XQQ{XMM{PP{LL{Int}},XZ}, XNN{XLL{XZ}}} via generating the following code:

transformtype((transformtype(QQ)){transformtype((transformtype(MM)){transformtype((transformtype((transformtype(gentype))())){transformtype((transformtype(LL)){transformtype(Int)})}), transformtype(Z)}), transformtype((transformtype(NN)){transformtype((transformtype(LL)){transformtype(Z)})})})

As you see here,
PP{LL{Int}} hasn’t changed because the type is PP. The others types are transformed to their new versions. So my question is how can I do this at runtime. How does transformtype look like? What is its signature ? I assume I will need some sort of a state.

Or is there a better way to get this done?

Thanks

2 
transformtype((transformtype(QQ, state)){transformtype((transformtype(MM, state)){transformtype((transformtype((transformtype(gentype, state))(), state)){transformtype((transformtype(LL, state)){transformtype(Int, state)}, state)}, state), transformtype(Z, state)}, state), transformtype((transformtype(NN, state)){transformtype((transformtype(LL, state)){transformtype(Z, state)}, state)}, state)}, state))

where state includes transformed and untransformed versions of the types, so that the outer one selects and chains and updates the state. This should work.
Thanks

3

Please quote your code and make an MWE.

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