This page documents the structure of the Expression object as returned by parse(...). If you're looking
for the Expression object returned by roll(...)expr, check out :ref:`Expression Tree`.
.. autoclass:: d20.ast.ChildMixin
.. method:: children
:property:
(read-only) The children of this object, usually used for traversing a tree.
:rtype: list[Node]
.. method:: left
:property:
The leftmost child of this object, usually used for traversing a tree.
:rtype: Node
.. method:: right
:property:
The rightmost child of this object, usually used for traversing a tree..
:rtype: Node
.. automethod:: set_child
.. autoclass:: d20.ast.Node
:show-inheritance:
.. autoclass:: d20.ast.Expression
:show-inheritance:
.. attribute:: roll
:type: d20.ast.Node
The subtree representing the expression's roll.
.. attribute:: comment
:type: Optional[str]
The comment of this expression.
.. autoclass:: d20.ast.AnnotatedNumber
:show-inheritance:
.. attribute:: value
:type: d20.ast.Node
The subtree representing the annotated value.
.. attribute:: annotations
:type: list[str]
The annotations on the value.
.. autoclass:: d20.ast.Literal
:show-inheritance:
.. attribute:: value
:type: Union[int, float]
The literal number represented.
.. autoclass:: d20.ast.Parenthetical
:show-inheritance:
.. attribute:: value
:type: d20.ast.Node
The subtree inside the parentheses.
.. autoclass:: d20.ast.UnOp
:show-inheritance:
.. attribute:: op
:type: str
The unary operation.
.. attribute:: value
:type: d20.ast.Node
The subtree that the operation operates on.
.. autoclass:: d20.ast.BinOp
:show-inheritance:
.. attribute:: op
:type: str
The binary operation.
.. attribute:: left
:type: d20.ast.Node
The left subtree that the operation operates on.
.. attribute:: right
:type: d20.ast.Node
The right subtree that the operation operates on.
.. autoclass:: d20.ast.OperatedSet
:show-inheritance:
.. attribute:: value
:type: d20.ast.NumberSet
The set to be operated on.
.. attribute:: operations
:type: list[d20.SetOperation]
The operations to run on the set.
.. autoclass:: d20.ast.NumberSet
:show-inheritance:
.. attribute:: values
:type: list[d20.ast.NumberSet]
The elements of the set.
.. autoclass:: d20.ast.OperatedDice
:show-inheritance:
.. autoclass:: d20.ast.Dice
:show-inheritance:
.. attribute:: num
:type: int
The number of dice to roll.
.. attribute:: size
:type: int
How many sides each die should have.
.. autoclass:: d20.ast.SetOperator
.. attribute:: op
:type: str
The operation to run on the selected elements of the set.
.. attribute:: sels
:type: list[d20.SetSelector]
The selectors that describe how to select operands.
.. autoclass:: d20.ast.SetSelector
.. attribute:: cat
:type: Optional[str]
The type of selection (lowest, highest, literal, etc).
.. attribute:: num
:type: int
The number to select (the N in lowest/highest/etc N, or literally N).