namespace facebook {
namespace graphql {
namespace ast {
  class Node;
}
std::unique_ptr<ast::Node> parseString(const char *text, const char **error);
std::unique_ptr<ast::Node> parseStringWithExperimentalSchemaSupport(
  const char *text, const char **error);
std::unique_ptr<ast::Node> parseFile(FILE *file, const char **error);
std::unique_ptr<ast::Node> parseFileWithExperimentalSchemaSupport(
  FILE *file, const char **error);
}
}