.. currentmodule:: graphql.language

.. automodule:: graphql.language
   :no-members:
   :no-inherited-members:

.. autoclass:: Location

.. autoclass:: Node

Each kind of AST node has its own class:

.. autoclass:: ArgumentNode

.. autoclass:: BooleanValueNode

.. autoclass:: ConstArgumentNode

.. autoclass:: ConstDirectiveNode

.. autoclass:: ConstListValueNode

.. autoclass:: ConstObjectFieldNode

.. autoclass:: ConstObjectValueNode

.. autoclass:: ConstValueNode

.. autoclass:: DefinitionNode

.. autoclass:: DirectiveDefinitionNode

.. autoclass:: DirectiveNode

.. autoclass:: DocumentNode

.. autoclass:: EnumTypeDefinitionNode

.. autoclass:: EnumTypeExtensionNode

.. autoclass:: EnumValueDefinitionNode

.. autoclass:: EnumValueNode

.. autoclass:: ErrorBoundaryNode

.. autoclass:: ExecutableDefinitionNode

.. autoclass:: FieldDefinitionNode

.. autoclass:: FieldNode

.. autoclass:: FloatValueNode

.. autoclass:: FragmentDefinitionNode

.. autoclass:: FragmentSpreadNode

.. autoclass:: InlineFragmentNode

.. autoclass:: InputObjectTypeDefinitionNode

.. autoclass:: InputObjectTypeExtensionNode

.. autoclass:: InputValueDefinitionNode

.. autoclass:: IntValueNode

.. autoclass:: InterfaceTypeDefinitionNode

.. autoclass:: InterfaceTypeExtensionNode

.. autoclass:: ListNullabilityOperatorNode

.. autoclass:: ListTypeNode

.. autoclass:: ListValueNode

.. autoclass:: NameNode

.. autoclass:: NamedTypeNode

.. autoclass:: NonNullAssertionNode

.. autoclass:: NonNullTypeNode

.. autoclass:: NullabilityAssertionNode

.. autoclass:: NullValueNode

.. autoclass:: ObjectFieldNode

.. autoclass:: ObjectTypeDefinitionNode

.. autoclass:: ObjectTypeExtensionNode

.. autoclass:: ObjectValueNode

.. autoclass:: OperationDefinitionNode

.. autoclass:: OperationType

.. autoclass:: OperationTypeDefinitionNode

.. autoclass:: ScalarTypeDefinitionNode

.. autoclass:: ScalarTypeExtensionNode

.. autoclass:: SchemaDefinitionNode

.. autoclass:: SchemaExtensionNode

.. autoclass:: SelectionNode

.. autoclass:: SelectionSetNode

.. autoclass:: StringValueNode

.. autoclass:: TypeDefinitionNode

.. autoclass:: TypeExtensionNode

.. autoclass:: TypeNode

.. autoclass:: TypeSystemDefinitionNode

.. autoclass:: TypeSystemExtensionNode

.. autoclass:: UnionTypeDefinitionNode

.. autoclass:: UnionTypeExtensionNode

.. autoclass:: ValueNode

.. autoclass:: VariableDefinitionNode

.. autoclass:: VariableNode

Directive locations are specified using the following enumeration:

.. autoclass:: DirectiveLocation

You can also check the type of nodes with the following predicates:

.. autofunction:: is_definition_node

.. autofunction:: is_executable_definition_node

.. autofunction:: is_selection_node

.. autofunction:: is_value_node

.. autofunction:: is_const_value_node

.. autofunction:: is_type_node

.. autofunction:: is_type_system_definition_node

.. autofunction:: is_type_definition_node

.. autofunction:: is_type_system_extension_node

.. autofunction:: is_type_extension_node

.. autoclass:: Lexer

.. autoclass:: TokenKind

.. autoclass:: Token

.. autofunction:: get_location

.. autoclass:: SourceLocation

.. autofunction:: print_location

.. autoclass:: FormattedSourceLocation
   :no-inherited-members:

.. autofunction:: parse

.. autofunction:: parse_type

.. autofunction:: parse_value

.. autofunction:: parse_const_value

.. autofunction:: print_ast

.. autoclass:: Source

.. autofunction:: print_source_location

.. autofunction:: visit

.. autoclass:: Visitor

.. autoclass:: ParallelVisitor

The module also exports the following enumeration that can be used as the return type for :class:`Visitor` methods:

.. currentmodule:: graphql.language.visitor

.. autoclass:: VisitorActionEnum

.. currentmodule:: graphql.language

The module also exports the values of this enumeration directly. These can be used as return values of :class:`Visitor` methods to signal particular actions:

.. data:: BREAK
   :annotation: (same as ``True``)

   This return value signals that no further nodes shall be visited.

.. data:: SKIP
   :annotation: (same as ``False``)

   This return value signals that the current node shall be skipped.

.. data:: REMOVE
   :annotation: (same as``Ellipsis``)

   This return value signals that the current node shall be deleted.

.. data:: IDLE
   :annotation: = None

   This return value signals that no additional action shall take place.