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[mrpt-rtti]

Detailed Description

Runtime Type Information (RTTI) library, providing compiler-independent class registry, class factory, and inheritance information.

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Library mrpt-rtti

[New in MRPT 2.0.0]

This library is part of MRPT and can be installed in Debian-based systems with:

    sudo apt install libmrpt-rtti-dev

Any class with RTTI support has to be derived from mrpt::rtti::CObject, either directly or via a hierarchy of inheriting classes. Class factory by name enables deserialization of polymorphic classes in the library [mrpt-serialization].

All classes defined in each MRPT module are automatically registered when loading the module (if dynamically linked).

Example #1: defining new user classes

See: rtti_example1/test.cpp

#include <iostream>
#include <memory>
namespace MyNS
{
class Foo : public mrpt::rtti::CObject
{
public:
Foo() {}
void printName() { std::cout << "printName: Foo" << std::endl; }
};
class BarBase : public mrpt::rtti::CObject
{
public:
BarBase() {}
virtual void printName() { std::cout << "printName: BarBase" << std::endl; }
};
class Bar : public BarBase
{
public:
Bar() {}
virtual void printName() override
{
std::cout << "class: Bar" << std::endl;
}
{
std::cout << "specificBarMethod: reached." << std::endl;
}
};
}
{
using namespace MyNS;
const auto id_foo = CLASS_ID(Foo);
std::cout << "RTTI Foo (static): " << id_foo->className << std::endl;
// Pointers:
Bar::Ptr pBar = std::make_shared<Bar>();
pBar->printName();
pBase->printName();
std::cout << "Is Foo? => " << (IS_DERIVED(pObj, Foo) ? "Yes" : "No")
<< std::endl;
std::cout << "Is BarBase? => " << (IS_DERIVED(pObj, BarBase) ? "Yes" : "No")
<< std::endl;
std::cout << "Is Bar? => " << (IS_DERIVED(pObj, Bar) ? "Yes" : "No")
<< std::endl;
if (IS_CLASS(pObj, Bar))
{
auto pBar = mrpt::ptr_cast<Bar>::from(pObj);
pBar->specificBarMethod();
}
}

Output:

Example #2: using the class factory

See: rtti_example1/test.cpp

#include <iostream>
#include <memory>
namespace MyNS
{
class Foo : public mrpt::rtti::CObject
{
public:
Foo() {}
void printName() { std::cout << "printName: Foo" << std::endl; }
};
class BarBase : public mrpt::rtti::CObject
{
public:
BarBase() {}
virtual void printName() { std::cout << "printName: BarBase" << std::endl; }
};
class Bar : public BarBase
{
public:
Bar() {}
virtual void printName() override
{
std::cout << "class: Bar" << std::endl;
}
{
std::cout << "specificBarMethod: reached." << std::endl;
}
};
}
{
// Register with explicit namespace:
{
// Register without explicit namespace:
using namespace MyNS;
}
}
{
// Test register:
{
const auto& allClasses = mrpt::rtti::getAllRegisteredClasses();
for (const auto& cl : allClasses)
{
std::cout << "Known class: " << cl->className << ", children of "
<< (cl->getBaseClass ? cl->getBaseClass()->className
: "(none)")
<< std::endl;
}
}
// Test factory:
{
if (IS_CLASS(pObj, MyNS::Bar))
{
pBar->specificBarMethod();
}
}
}

Output:

Classes

class  mrpt::rtti::CListOfClasses
 A list (actually based on a std::set) of MRPT classes, capable of keeping any class registered by the mechanism of CObject classes. More...
 
struct  mrpt::rtti::TRuntimeClassId
 A structure that holds runtime class type information. More...
 
struct  mrpt::rtti::CLASSINIT
 Auxiliary structure used for CObject-based RTTI. More...
 
class  mrpt::rtti::CObject
 The virtual base class of all MRPT classes with a unified RTTI system. More...
 
struct  mrpt::ptr_cast< CAST_TO >
 Converts a polymorphic smart pointer Base::Ptr to Derived::Ptr, in a way compatible with MRPT >=1.5.4 and MRPT 2.x series. More...
 



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