Package pyxb :: Package utils :: Module fac :: Class Choice

type Choice

object --+        
         |        
      Node --+    
             |    
 MultiTermNode --+
                 |
                Choice

A term that may be any one of a set of terms.

This term matches if any one of its contained terms matches.

Instance Methods

[hide private]

__init__(self, *terms, **kw)
Term that selects one of a set of terms.

source code

_first(self)
Abstract method that defines first for the subclass.

source code

_last(self)
Abstract method that defines last for the subclass.

source code

_nullable(self)
Abstract method that defines nullable for the subclass.

source code

_follow(self)
Abstract method that defines follow for the subclass.

source code

__str__(self)

source code

Inherited from MultiTermNode: clone

Inherited from MultiTermNode (private): _walkTermTree

Inherited from Node: buildAutomaton, counterSubPositions, reset, walkTermTree

Inherited from Node (private): _facToString

Class Methods

[hide private]

Inherited from Node (private): _PosConcatPosSet, _PosConcatTransitionSet, _PosConcatUpdateInstruction

Class Variables

[hide private]

_Precedence = -3
An integral value used for parenthesizing expressions.

Inherited from Node: INCREMENT, RESET

Properties

[hide private]

Inherited from MultiTermNode: terms

Inherited from Node: counterPositions, first, follow, last, metadata, nodePosMap, nullable, posNodeMap

Method Details

[hide private]

init(self, *terms, **kw)
(Constructor)

source code

Term that selects one of a set of terms.

The terms are provided as arguments. All must be instances of a subclass of Node.

Parameters:

metadata - Any application-specific metadata retained in the term tree for transfer to the resulting automaton.

Overrides: Node.__init__

_first(self)

source code

Abstract method that defines first for the subclass.

The return value should be an iterable of tuples of integers denoting paths from this node through the term tree to a symbol.

Overrides: Node._first: (inherited documentation)

_last(self)

source code

Abstract method that defines last for the subclass.

The return value should be an iterable of tuples of integers denoting paths from this node through the term tree to a symbol.

Overrides: Node._last: (inherited documentation)

_nullable(self)

source code

Abstract method that defines nullable for the subclass.

The return value should be True or False.

Overrides: Node._nullable: (inherited documentation)

_follow(self)

source code

Abstract method that defines follow for the subclass.

The return value should be a map from tuples of integers (positions) to a list of transitions, where a transition is a position and an update instruction.

Overrides: Node._follow: (inherited documentation)

str(self)
(Informal representation operator)

source code

Overrides: object.__str__: (inherited documentation)

type Choice

__init__(self, *terms, **kw) (Constructor)

_first(self)

_last(self)

_nullable(self)

_follow(self)

__str__(self) (Informal representation operator)

init(self, *terms, **kw)
(Constructor)

str(self)
(Informal representation operator)