This implementation is relatively low-level by design, it doesn't provide any mappings between the GraphQL types and Haskell's type system and avoids compile-time magic. It focuses on flexibility instead, so other solutions can be built on top of it.

State of the work

For now this library provides:

Parser for the query and schema languages, as well as a printer for the query language (minimizer and pretty-printer).
Data structures to define a type system.
Executor (queries, mutations and subscriptions are supported).
Validation is work in progress.
Introspection isn't available yet.

But the idea is to be a Haskell port of graphql-js.

For a more precise list of currently missing features see issues.

Documentation

API documentation is available through Hackage.

Further documentation will be made available in the Wiki.