Visitor Class Reference
[Visitor]

#include <Visitor.h>

Inheritance diagram for Visitor:

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Detailed Description

The building block of Acyclic Visitor

Usage

Defining the visitable class:

 class RasterBitmap : public BaseVisitable<>
 {
 public:
     LOKI_DEFINE_VISITABLE()
 };

Way 1 to define a visitor:

 class SomeVisitor : 
     public BaseVisitor // required
     public Visitor<RasterBitmap>,
     public Visitor<Paragraph>
 {
 public:
     void Visit(RasterBitmap&); // visit a RasterBitmap
     void Visit(Paragraph &);   // visit a Paragraph
 };

Way 2 to define the visitor:

 class SomeVisitor : 
     public BaseVisitor // required
     public Visitor<LOKI_TYPELIST_2(RasterBitmap, Paragraph)>
 {
 public:
     void Visit(RasterBitmap&); // visit a RasterBitmap
     void Visit(Paragraph &);   // visit a Paragraph
 };

Way 3 to define the visitor:

 class SomeVisitor : 
     public BaseVisitor // required
     public Visitor<Seq<RasterBitmap, Paragraph>::Type>
 {
 public:
     void Visit(RasterBitmap&); // visit a RasterBitmap
     void Visit(Paragraph &);   // visit a Paragraph
 };

Using const visit functions:

Defining the visitable class (true for const):

 class RasterBitmap : public BaseVisitable<void, DefaultCatchAll, true>
 {
 public:
     LOKI_DEFINE_CONST_VISITABLE()
 };

Defining the visitor which only calls const member functions:

 class SomeVisitor : 
     public BaseVisitor // required
     public Visitor<RasterBitmap, void, true>,
 {
 public:
     void Visit(const RasterBitmap&); // visit a RasterBitmap by a const member function
 };

Example:

test/Visitor/main.cpp

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

• Visitor.h

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