Dune::ACFem::ExpressionTemplate< ExpressionImp > Struct Template Reference

Provide up-cast functionality for expression templates. More...

#include <dune/acfem/expressions/expressionoperations.hh>

Public Types
typedef ExpressionImp	ExpressionType
	The type of the underlying expression.

Public Member Functions
const ExpressionType &	expression () const
	Return a const reference to the underlying expression.
ExpressionType &	expression ()
	Return a mutable reference to the underlying expression.
ExpressionType	operator* () const
	Return a copy from of the underlying expression.

Detailed Description

template<class ExpressionImp>
struct Dune::ACFem::ExpressionTemplate< ExpressionImp >

Provide up-cast functionality for expression templates.

Some expression (like the IdentityOperation) should avoid double-wrapping of existing expression templates. To ease this task, expression templates can inherit from this structure. See gridfunctionexpressions.hh for an example.

Also, any class inheriting directly or indirectly form this class is stored as a copy inside expression templates in order to allow forming expressions from temporaries without having to worry about dangling references.

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The documentation for this struct was generated from the following file:

• dune/acfem/expressions/expressionoperations.hh