BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Error message when base class destructor called directly.          BorlandTalk.com Forum Index -> C++ Builder (Language C++) View previous topic :: View next topic   Author Message Vladimir Grigoriev Guest Posted: Fri May 11, 2007 10:29 pm    Post subject: Error message when base class destructor called directly. Is it correct error mesage E2093 'operator'~' not implemented in type 'Stack' for arguments of the same type when I try to call base class destructor directly ~Stack(); Vladimir Grigoriev Back to top Sergiy Kanilo Guest Posted: Fri May 11, 2007 10:47 pm    Post subject: Re: Error message when base class destructor called directly "Vladimir Grigoriev" <vlad.moscow (AT) mail (DOT) ru> wrote in message news:4644a766 (AT) newsgroups (DOT) borland.com... Quote: Is it correct error mesage E2093 'operator'~' not implemented in type 'Stack' for arguments of the same type yes, you are creating temporary Stack using default constructor and apply operator~ to it Quote: when I try to call base class destructor directly ~Stack(); for direct destructor call you have to use -> or . for example, in nonstatic member function this->~Stack(); Cheers, Serge PS: and the next couple days we'll be discussing "why you should not do that" Back to top Vladimir Grigoriev Guest Posted: Fri May 11, 2007 10:53 pm    Post subject: Re: Error message when base class destructor called directly O'k, I use Stack::~Stack() :) Vladimir Grigoriev "Sergiy Kanilo" <skanilo (AT) artannlabs (DOT) com> wrote in message news:4644ac30$1 (AT) newsgroups (DOT) borland.com... Quote: yes, you are creating temporary Stack using default constructor and apply operator~ to it when I try to call base class destructor directly ~Stack(); for direct destructor call you have to use -> or . for example, in nonstatic member function this->~Stack(); Cheers, Serge PS: and the next couple days we'll be discussing "why you should not do that" :) Back to top Sergiy Kanilo Guest Posted: Fri May 11, 2007 11:22 pm    Post subject: Re: Error message when base class destructor called directly "Vladimir Grigoriev" <vlad.moscow (AT) mail (DOT) ru> wrote in message news:4644accd (AT) newsgroups (DOT) borland.com... Quote: O'k, I use Stack::~Stack() :) Vladimir Grigoriev It not the standard way to call destructor (5.2.4). I tried to compile struct A { void f() { A::~A(); } }; with three compilers and only one allows that 1) comeau online: "ComeauTest.c", line 5: error: class "A" has no member "~A" 2) BDS2006 gives very strange error message [C++ Error] Unit1.cpp(5): E2451 Undefined symbol '}' 3) MS VS2005 - seems ok with the code All three compilers have no problem with this->~A(); Cheers, Serge Back to top Dennis Cote Guest Posted: Fri May 11, 2007 11:46 pm    Post subject: Re: Error message when base class destructor called directly Sergiy Kanilo wrote: Quote: PS: and <in> the next couple days we'll be discussing "why you should not do that" :) Sergiy, I suspect that is true. Dennis Cote Back to top Dennis Cote Guest Posted: Fri May 11, 2007 11:47 pm    Post subject: Re: Error message when base class destructor called directly Vladimir Grigoriev wrote: Quote: when I try to call base class destructor directly Vladimir, Why are you trying to call a base class destructor? Normally the compiler will do that for you if it's necessary. Dennis Cote Back to top Remy Lebeau (TeamB) Guest Posted: Sat May 12, 2007 12:56 am    Post subject: Re: Error message when base class destructor called directly "Vladimir Grigoriev" <vlad.moscow (AT) mail (DOT) ru> wrote in message news:4644a766 (AT) newsgroups (DOT) borland.com... Quote: I try to call base class destructor directly Unless you used the 'placement new' operator to construct the class in a block of preallocated memory, then you should NOT be calling any destructor directly at all. Gambit Back to top Vladimir Grigoriev Guest Posted: Mon May 14, 2007 4:47 pm    Post subject: Re: Error message when base class destructor called directly "Sergiy Kanilo" <skanilo (AT) artannlabs (DOT) com> wrote in message news:4644b454 (AT) newsgroups (DOT) borland.com... Quote: "Vladimir Grigoriev" <vlad.moscow (AT) mail (DOT) ru> wrote in message news:4644accd (AT) newsgroups (DOT) borland.com... It not the standard way to call destructor (5.2.4). I tried to compile struct A { void f() { A::~A(); } }; 2) BDS2006 gives very strange error message [C++ Error] Unit1.cpp(5): E2451 Undefined symbol '}' Cheers, Serge It is interesting if you will include in the structure ~A(){} BCB 5.0 will not report any error. 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