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louis-langholtz/RtPolymorphicVisitor.md

Last active January 11, 2018 00:40
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Runtime Polymorphic Visitor
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RtPolymorphicVisitor.md

Extend the runtime polymorphism to vistor like pattern...

namespace playrho {

template <>
void Visit(const d2::EdgeShapeConf& shape, void* userData)
{
    const auto shapeDrawer = static_cast<ShapeDrawer*>(userData);
    shapeDrawer->Visit(shape);
}

This provides application based visitation with userData providing some customization (based on the capability/flexibility of ShapeDrawer) at the point of calling the Visit function on the Shape. Can we do "better" than ShapeDrawer? Can we elegantly have userData pull in a completely configurable lambda per the given class (d2::EdgeShapeConf for instance)?

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