singletons

This library generates singleton types, promoted functions, and singleton functions using Template Haskell. It is useful for programmers who wish to use dependently typed programming techniques. The library was originally presented in Dependently Typed Programming with Singletons, published at the Haskell Symposium, 2012. (https://cs.brynmawr.edu/~rae/papers/2012/singletons/paper.pdf) Version 1.0 and onwards works a lot harder to promote functions. See the paper published at Haskell Symposium, 2014: https://cs.brynmawr.edu/~rae/papers/2014/promotion/promotion.pdf.