An API for efficient and convenient construction of vectors.
It provides the composable `Builder` abstraction, which has instances of the `Monoid` and `Semigroup` classes.
First you use the `Builder` abstraction to specify the structure of the vector.
Then you execute the builder to actually produce the vector.
The following code shows how you can efficiently concatenate different datastructures into a single immutable vector:
>import qualified Data.Vector as A
>import qualified VectorBuilder.Builder as B
>import qualified VectorBuilder.Vector as C
>myVector :: A.Vector a -> [a] -> a -> A.Vector a
>myVector vector list element =
> C.build builder
> builder =
> B.vector vector <>
> foldMap B.singleton list <>
> B.singleton element