C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Problem overloading operator= in a class          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Lilith Guest Posted: Sun May 20, 2007 6:10 am    Post subject: Problem overloading operator= in a class I have a class called Intersection which contains the following with public access... Intersection operator= (Intersection &i); It's defined as... Intersection Intersection::operator= (Intersection &i) { this->ID = i.ID; this->x = i.x; [snip] this->se = i.se; this->ss = i.ss; this->sw = i.sw; } A private method used to clear an array has the following code... void Intersection::clearLandscape(void) { Intersection temp; for (int j=0; j < 250; j++) { Landscape[j] = temp; } } Landscape is a static array member of Intersection objects and temp is an Intersetion object that takes the default constructor. When I compile I get the following error... binary '=' : no operator defined which takes a right-hand operand of type 'class Intersection' (or there is no acceptable conversion) with regards to the Landscape[j] = temp statement. Can anyone see where my error is? -- TIA, Lilith Back to top Daniel T. Guest Posted: Sun May 20, 2007 7:43 am    Post subject: Re: Problem overloading operator= in a class In article <f87v435hhllqpll2rhs3nar23lt0uvv3ru (AT) 4ax (DOT) com>, Lilith <lilith (AT) dcccd (DOT) edu> wrote: Quote: I have a class called Intersection which contains the following with public access... Intersection operator= (Intersection &i); It's defined as... Intersection Intersection::operator= (Intersection &i) { this->ID = i.ID; this->x = i.x; [snip] this->se = i.se; this->ss = i.ss; this->sw = i.sw; } If all your op= does is assign each member to its corresponding member, then remove the op= from your class and everything will work. BTW, the canonical op= is "Type& operator=( const Type& );" and sometimes you will see, "Type& operator=( Type );" or even "const Type& operator=( const Type& );" Your signature is rather non-standard. Quote: Can anyone see where my error is? Your error is that you are not showing the code that fails to compile. Note that the code below compiles fine. class Intersection { public: Intersection operator=( Intersection& i ); }; Intersection Intersection::operator=( Intersection& i ) { return *this; } void clearLandscape() { Intersection temp; Intersection landscape[250]; for (int j=0; j < 250; j++) { landscape[j] = temp; } } Back to top zeppe Guest Posted: Sun May 20, 2007 9:11 am    Post subject: Re: Problem overloading operator= in a class Daniel T. wrote: Quote: If all your op= does is assign each member to its corresponding member, then remove the op= from your class and everything will work. BTW, the canonical op= is "Type& operator=( const Type& );" and sometimes you will see, "Type& operator=( Type );" or even "const Type& operator=( const Type& );" Your signature is rather non-standard. It is standard. The only prolem is that is useless. There are some situations (quite rare, to be fair, given the usual semantic of the operator=) in qhich you may want to change something in the right operand of the '='. Regards, Zeppe Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.