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https://stackoverflow.com/questions/44444847/dynamic-cast-compatibility
rtti is expensive at runtime and some embedded systems compile with flags, disabling it. All it gives you are dynamic_cast and typeid. Therefore, I interpret. because you do not know if it is supported fully by the compiler. as . because your code could have been compiled with rtti disabled.
https://docs.microsoft.com/en-us/cpp/cpp/run-time-type-information
RTTI was added to the C++ language because many vendors of class libraries were implementing this functionality themselves. This caused incompatibilities between libraries. Thus, it became obvious that support for run-time type information was needed at the language level.
https://forums.unrealengine.com/development-discussion/c-gameplay-programming/62478-compiler-enable-run-time-type-information
Nov 18, 2015 · UE4 disables C++ RTTI for a number of reasons. However, the main one is that UE4 builds its own RTTI and using built in RTTI would be quite wasteful. Furthermore, it could cause unknown errors as I doubt it has been tried. Instead of doing a dynamic cast, just use a plain C-style cast or Epic's own Cast template function.
https://www.runtime.org/support.htm
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http://www.equestionanswers.com/vcpp/mfc-class-rtti.php
How a MFC class can support RTTI? << Index >> Run-Time Type Information/RTTI. Run-Time Type Information is a property to identify the name or type of an object at runtime. C++ object usually do not contain type information. Run-Time Type Information is the name or type in the class. This helps to idetify the type as well as the hierarchil ...
https://docs.oracle.com/cd/E19957-01/806-3571/RTTI.html
RTTI allows the programmer to determine the dynamic type of the pointer. 6.2 RTTI Options. In compatibility mode (-compat[=4]), RTTI support requires significant resources to implement.RTTI is disabled by default in that mode.
https://subscription.packtpub.com/book/application_development/9781849514880/10/ch10lvl1sec94/detecting-rtti-support
Aug 26, 2013 · Some companies and libraries have specific requirements for their C++ code, such as successful compilation without Runtime type information (RTTI). Some companies and libraries have specific requirements for their C++ code, such as successful compilation without Runtime type information (RTTI).Released on: August 26, 2013
https://gcc.gnu.org/ml/gcc-patches/2000-01/msg01070.html
Hi, Following Mark's feedback, I've installed the attached patch which implements the compiler side of the new-abi rtti. This is currently explicitly disabled. Shortly, the runtime support will be added, at which point -fnew-abi will start using the new abi rtti system.
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