10.4. Collection Parsers
The Sequence and Alternation classes are subclasses of CollectionParser, as Figure 10.3 shows. These classes have a common way of adding and storing their subparsers. They differ primarily in how they match a set of assemblies.
Figure 10.3. The CollectionParser class. CollectionParser is the abstract superclass of the two fundamental types of collection parsers: Alternation and Sequence.
The main behavior that CollectionParser provides to its subclasses is the ability to add a parser to a collection.
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