GraphQL v0.3.0 GraphQL.Lang.AST.TypeInfoVisitor
A Visitor implementation that adds type information to the accumulator, so that subsequent visitors can use the information to perform validations.
NOTE: this file is mostly a straight clone from the graphql-js implementation. There were no tests for the graphql-js implementation and there are no tests for this one. Like the JS version, this implementation will be tested indirectly by the validator tests.