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.NET Forum / Languages / Managed C++ / November 2007Overriding Object::ToString()
Hi, why I can not override it? This line: virtual String^ ToString() override = Object::ToString; produces this error: cannot override base class method 'System::Object::ToString'. Why is that? Here is the code: http://eugeneciurana.com/pastebin/pastebin.php?show=5333 Thanks in advance, Etam. >why I can not override it? > [quoted text clipped - 6 lines] >Here is the code: >http://eugeneciurana.com/pastebin/pastebin.php?show=5333 Etam, The code shown there compiles fine for me with VS2005. Dave > >why I can not override it? > [quoted text clipped - 12 lines] > > Dave Is it possible that Vista is the cause? http://odwrotnie.homeip.net/ToString.PNG Thanks, Etam. >> >Here is the code: >> >http://eugeneciurana.com/pastebin/pastebin.php?show=5333 [quoted text clipped - 7 lines] >Is it possible that Vista is the cause? >http://odwrotnie.homeip.net/ToString.PNG I wouldn't have thought so. Which version of VS are you using? Your code in that picture isn't precisely what's shown at that previous link, so what else is different? Do you have a small self contained example that reproduces this? Dave > I wouldn't have thought so. Which version of VS are you using? 2005... > Your code in that picture isn't precisely what's shown at that > previous link, so what else is different? It is the same... I've copied and pasted it. > Do you have a small self contained example that reproduces this? I don't really understand what do You mean ;). > Dave Thanks, Etam. >> Your code in that picture isn't precisely what's shown at that >> previous link, so what else is different? > >It is the same... I've copied and pasted it. It's not, the name has changed at the very least. >> Do you have a small self contained example that reproduces this? > >I don't really understand what do You mean ;). An entire single file that compiles - just stick everything in the main source file of a console project that reproduces the issue for you (since what you showed is fine for me). Dave > Is it possible that Vista is the cause? > http://odwrotnie.homeip.net/ToString.PNG No, but you are missing "using namespace System;" so the name "String" is confusing the compiler. > Thanks, > Etam. > > Is it possible that Vista is the cause? > >http://odwrotnie.homeip.net/ToString.PNG > > No, but you are missing "using namespace System;" so the name "String" is > confusing the compiler. Thanks! You are right... Why does String::ToString even exist? Why is there a method that converts a String to a String? Isn't that a no-op? ;) I can see why you'd want to override it, it should do nothing as it is... And how does one find out what built-in methods are virtual/overridable? I had no idea I could redefine ToString( ) for example. By experimentation only, or is there a reference for this? MSDN2 isn't much help, you have to know the answer before you can look up the question!!! lol >> > Is it possible that Vista is the cause? >> >http://odwrotnie.homeip.net/ToString.PNG [quoted text clipped - 3 lines] > > Thanks! You are right... > Why does String::ToString even exist? Why is there a method that converts > a So that you can call ToString on *any* object. > String to a String? Isn't that a no-op? ;) I can see why you'd want to Yes, it is a no-op. > override it, it should do nothing as it is... > > And how does one find out what built-in methods are virtual/overridable? I > had no idea I could redefine ToString( ) for example. By experimentation > only, or is there a reference for this? MSDN2 isn't much help, you have to > know the answer before you can look up the question!!! lol You're right about that, even the class member list on msdn doesn't indicate virtual-ness. I think Reflector indicates virtual members with a different icon though (there seems to be a correlation between the double pink box and virtual/override functions). >>> > Is it possible that Vista is the cause? >>> >http://odwrotnie.homeip.net/ToString.PNG [quoted text clipped - 4 lines] >> >> Thanks! You are right... PS - etam, don't you think your name is a little bit 'backwards, mate'? hehe >> > Is it possible that Vista is the cause? >> >http://odwrotnie.homeip.net/ToString.PNG [quoted text clipped - 3 lines] > > Thanks! You are right...
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