OptionalSequence class final
Represents an optional sequence of elements (e.g., [foo bar]).
- Implemented types
Constructors
- OptionalSequence(ElementSequence elements, {String? description})
Properties
- asAlternatives → ElementSequence
-
Returns the alternatives for backtracking: the sequence and an empty match.
no setter
- description → String?
-
An optional human-readable description of this element.
final
- elements → ElementSequence
-
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- sequence → Sequence
-
final
Methods
-
accept(
ElementVisitor visitor) → void -
Accepts an ElementVisitor for traversing the grammar tree.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
parse(
String source) → ParseResult -
Attempts to parse the
sourcestring matching this element.override -
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited