class GraphQL::StaticValidation::NoDefinitionsArePresent

def validate(context)
  schema_definition_nodes = []
  register_node = ->(node, _p) {
    schema_definition_nodes << node
    GraphQL::Language::Visitor::SKIP
  }
  visitor = context.visitor
  visitor[GraphQL::Language::Nodes::DirectiveDefinition] << register_node
  visitor[GraphQL::Language::Nodes::SchemaDefinition] << register_node
  visitor[GraphQL::Language::Nodes::ScalarTypeDefinition] << register_node
  visitor[GraphQL::Language::Nodes::ObjectTypeDefinition] << register_node
  visitor[GraphQL::Language::Nodes::InputObjectTypeDefinition] << register_node
  visitor[GraphQL::Language::Nodes::InterfaceTypeDefinition] << register_node
  visitor[GraphQL::Language::Nodes::UnionTypeDefinition] << register_node
  visitor[GraphQL::Language::Nodes::EnumTypeDefinition] << register_node
  visitor[GraphQL::Language::Nodes::Document].leave << ->(node, _p) {
    if schema_definition_nodes.any?
      context.errors << message(%|Query cannot contain schema definitions|, schema_definition_nodes, context: context)
    end
  }
end