NaryLexer

Description

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

Refinement of

Lexer

Notation

l: A NaryLexer.
L: A NaryLexer type.

Valid Expressions

In addition to the requirements defined in Lexer, for any NaryLexer the following must be met:

Expression	Semantics	Return type
`l.elements`	The tuple of elements.	A Boost.Fusion Sequence of `Lexer` types.

Type Expressions

Expression	Description
`l.elements_type`	Elements tuple type.
`traits::is_nary_lexer<L>::type`	Metafunction that evaluates to `mpl::true_` if a certain type, `L` is a NaryLexer, `mpl::false_` otherwise (See MPL Boolean Constant).

Invariants

For each element, E, in any NaryLexer, L, the following invariant always holds:

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

Models

The following lexer components conform to this model:

lexer sequence component

FIXME Add more links to models of NaryLexer concept