A GraphQLError describes an Error found during the parse, validate, or execute phases of performing a GraphQL operation. In addition to a message and stack trace, it also includes information about the locations in a GraphQL document and/or execution result that correspond to the Error.

Given a GraphQLError, format it according to the rules described by the Response Format, Errors section of the GraphQL Specification.

Given an arbitrary Error, presumably thrown while attempting to execute a GraphQL operation, produce a new GraphQLError aware of the location in the document responsible for the original Error.

Prints a GraphQLError to a string, representing useful location information about the error's position in the source.

Produces a GraphQLError representing a syntax error, containing useful descriptive information about the syntax error's position in the source.