Lookup returns the appropriate token for the provided string.

NewDocSet creates a new document set.

NoPos is the zero value for Pos; there is no document and line information associated with it, and NoPos.IsValid() is false.

A Doc is a handle for a GraphQL document belonging to a DocSet.

A DocSet represents a set of GraphQL documents.

Position describes an arbitrary source position including the document, line, and column location.

Pos is a compact encoding of a source position within a document set.

Token contains all the lexical tokens for the GraphQL IDL.