Package rxpy :: Package graph :: Module opcode :: Class Character

Class Character

Match a single character. Currently the __contains__ method should be used for testing; that will call the BaseAlphabet as required.

How can this be improved?

intervals define simple character ranges (eg. 0-9).
alphabet is the alphabet used.
classes is a list of (class_, label, invert) triplets, where: - class_ is a method on alphabet (eg. .digit) - label is used for display - invert is true if class_ should fail
inverted is a global boolean that inverts the entire result (if True the test should fail).
complete is True if the test (without invert) will always succeed.

Instance Methods

[hide private]

__init__(self, intervals, alphabet, classes=None, inverted=False, complete=False)
Subclasses should pay attention to the relationship between constructor kargs and attributes assumed in .clone. source code

_kargs(self)
Generate a list of arguments used for cloning.

source code

append_interval(self, interval)

source code

append_class(self, class_, label, inverted=False)

source code

visit(self, visitor, state=None)
The visitor pattern - used to evaluate the graph by an interpreter, for example.

source code

invert(self)

source code

__contains__(self, character)

source code

__str__(self)
This returns (the illegal) [^] for all and [] for none.

source code

__hash__(self)
hash(x)

source code

__bool__(self)

source code

__nonzero__(self)

source code

simplify(self)

source code

Inherited from support.BaseNode: __repr__, clone, concatenate, consumer, deep_eq, size, start

Inherited from support.BaseNode (private): _node_eq

Inherited from object: __delattr__, __format__, __getattribute__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, intervals, alphabet, classes=None, inverted=False, complete=False)
(Constructor)

source code

Subclasses should pay attention to the relationship between constructor kargs and attributes assumed in .clone.

Overrides: object.__init__: (inherited documentation)

_kargs(self)

source code

Generate a list of arguments used for cloning. Subclasses can over-ride this if necessary, but probably shouldn't (instead, they should have attributes that correspond to kargs).

Overrides: support.BaseNode._kargs: (inherited documentation)

visit(self, visitor, state=None)

source code

The visitor pattern - used to evaluate the graph by an interpreter, for example. Calls back to the visitor via the interface described in rxpy.parser.visitor.Visitor.

Overrides: support.BaseNode.visit: (inherited documentation)

str(self)
(Informal representation operator)

source code

This returns (the illegal) [^] for all and [] for none.

Overrides: object.__str__

hash(self)
(Hashing function)

source code

hash(x)

Overrides: object.__hash__: (inherited documentation)

Class Character

__init__(self, intervals, alphabet, classes=None, inverted=False, complete=False) (Constructor)

_kargs(self)

visit(self, visitor, state=None)

__str__(self) (Informal representation operator)

__hash__(self) (Hashing function)

init(self, intervals, alphabet, classes=None, inverted=False, complete=False)
(Constructor)

str(self)
(Informal representation operator)

hash(self)
(Hashing function)