NaryParser

NaryParser is a composite parser that has one or more subjects. The NaryParser allows its subjects to be treated in the same way as a single instance of a Parser following the Composite Design Pattern.

Refinement of

Parser

Notation

p: A NaryParser.
P: A NaryParser type.

Valid Expressions

In addition to the requirements defined in Parser, for any NaryParser the following must be met:

Expression	Semantics	Return type
`p.elements`	The tuple of elements.	A Boost.Fusion Sequence of `Parser` types.

Type Expressions

Expression	Description
`p.elements_type`	Elements tuple type.
`traits::is_nary_parser<P>::type`	Metafunction that evaluates to `mpl::true_` if a certain type, `P` is a NaryParser, `mpl::false_` otherwise (See MPL Boolean Constant).

Invariants

For each element, E, in any NaryParser, P, the following invariant always holds:

traits::is_parser<E>::type evaluates to mpl::true_

Models

Alternative
Expectation operator
Permutation
Sequence
Sequential Or