- Closes#2258
# Overview
When we define a type with a single constructor and one ore more fields,
a local module is generated with the same name as the inductive type.
This module contains a projection for every field. Projections can be
used as any other function.
E.g. If we have
```
type Pair (A B : Type) := mkPair {
fst : A;
snd : B;
};
```
Then we generate
```
module Pair;
fst {A B : Type} : Pair A B -> A
| (mkPair a b) := a;
snd : {A B : Type} : Pair A B -> B
| (mkPair a b) := b;
end;
```
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