c++ Programming Glossary: downcastBest Practice For List of Polymorphic Objects in C++ http://stackoverflow.com/questions/1080448/best-practice-for-list-of-polymorphic-objects-in-c class pointer to the wrong derived type. Users should not downcast but rather use the polymorphism and the base shape operations.. provided. Consider why they would be interested in downcasting if you find a reason to do so go back to drawing board and.. provides all needed operations. Then if the user wants to downcast they should use dynamic_cast and they will get the same behavior..
Are there cases where downcasting an actual Base to a Derived would be defined? http://stackoverflow.com/questions/20263888/are-there-cases-where-downcasting-an-actual-base-to-a-derived-would-be-defined there cases where downcasting an actual Base to a Derived would be defined In the general.. makes sense the standard does not define the behavior of a downcast in those conditions. The not so obvious naive case Yet I was..
Can someone explain C++ Virtual Methods? http://stackoverflow.com/questions/2391679/can-someone-explain-c-virtual-methods question You need at least 1 level of inheritance and a downcast to demonstrate it. Here is a very simple example class Animal..
How to properly downcast in C# with a SWIG generated interface? http://stackoverflow.com/questions/2458025/how-to-properly-downcast-in-c-sharp-with-a-swig-generated-interface to properly downcast in C# with a SWIG generated interface I've got a very large.. I'm left with #3 Any help would be appreciated. c# c swig downcasting share improve this question By default SWIG generates.. SWIG generates C# and Java code that does not support downcast for polymorphic return types. I found a straightforward way..
Regular cast vs. static_cast vs. dynamic_cast http://stackoverflow.com/questions/28002/regular-cast-vs-static-cast-vs-dynamic-cast type of the object is. You cannot use dynamic_cast if you downcast and the argument type is not polymorphic. An example if JumpStm..
Why do we need “this pointer adjustor thunk”? http://stackoverflow.com/questions/3481548/why-do-we-need-this-pointer-adjustor-thunk of the derived object. This operation is the same as a downcast static_cast derived this . Remember that at this point the this..
FAQ: Why does dynamic_cast only work if a class has at least 1 virtual method? http://stackoverflow.com/questions/4227328/faq-why-does-dynamic-cast-only-work-if-a-class-has-at-least-1-virtual-method improve this question Because dynamic_cast can only downcast polymorphic types so sayeth the Standard. You can make your..
What is the C++ equivalent of java.lang.Object x = new Foo()? http://stackoverflow.com/questions/4233123/what-is-the-c-equivalent-of-java-lang-object-x-new-foo type may be then retrieved by way of a polymorphic downcast construct e.g. dynamic_cast boost any_cast etc. . However solutions.. be detected at compile time. Thus incorrect usage of downcast constructs will lead to bugs detectable only at run time. Addition.. If a new concrete type is added to the hierarchy existing downcast code will continue to work as is wholly ignoring the new type...
Is it safe to “upcast” a method pointer and use it with base class pointer? http://stackoverflow.com/questions/4272909/is-it-safe-to-upcast-a-method-pointer-and-use-it-with-base-class-pointer Clause 5.2.9 9 says you can upcast only if you can also downcast as specified in 禮 4.11 An rvalue of type 𦑩ointer to member of.. this conversion is ill formed. This just says you can downcast as long as B is accessible isn't virtual and only appears once..
Options for class design using safe downcasting http://stackoverflow.com/questions/5381690/options-for-class-design-using-safe-downcasting for class design using safe downcasting Hi I've started working on some pre existing code which.. a generic element the user then checks the type and can downcast to the specific type to access its specific information. This..
What is the difference between static_cast and reinterpret_cast? [duplicate] http://stackoverflow.com/questions/6855686/what-is-the-difference-between-static-cast-and-reinterpret-cast . For your case you should use the static_cast since the downcast from the void is well defined in some circumstances. share..
Dynamic downcast on private inheritance within private scope http://stackoverflow.com/questions/6927895/dynamic-downcast-on-private-inheritance-within-private-scope downcast on private inheritance within private scope A tweak on this.. from A publicly both casts would work. c casting private downcasting share improve this question 5.2.7 ISO IEC 14882 12 29..
C-Style upcast and downcast involving private inheritance http://stackoverflow.com/questions/844816/c-style-upcast-and-downcast-involving-private-inheritance Style upcast and downcast involving private inheritance Consider the following piece.. casted to aPtr3 i will have to use another C style cast to downcast to B as again both static_cast and dynamic_cast fail. So is..
What is the difference between static_cast and Implicit_cast? http://stackoverflow.com/questions/868306/what-is-the-difference-between-static-cast-and-implicit-cast of any implicit conversion up to some limits. you can't downcast if there is a virtual base class involved . But implicit_cast..
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