Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
type_index is just a typedef
for boost::typeindex::stl_type_index
or boost::typeindex::ctti_type_index.
Depending on the typeid()
availability TypeIndex library will choose an optimal class for type_index. In cases when at least basic
support for typeid()
is available stl_type_index
will be used.
BOOST_TYPE_INDEX_REGISTER_CLASS
macro is a helper macro that places some virtual helper functions or expands
to nothing.
BOOST_TYPE_INDEX_REGISTER_RUNTIME_CLASS
macro is a helper macro that places the same helpers as BOOST_TYPE_INDEX_REGISTER_CLASS
plus some additional helpers for boost::typeindex::runtime_cast to function.
Issues with cross module type comparison on a bugged compilers are bypassed by directly comparing strings with type (latest versions of those compilers resolved that issue using exactly the same approach).