Re: std::vector RTE(Run Time Error),

From:
Ian Collins <ian-news@hotmail.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 06 Sep 2012 10:55:44 +1200
Message-ID:
<aaq3jhFrd9U1@mid.individual.net>
On 09/ 6/12 10:16 AM, ArbolOne wrote:

If you want help, explain the context specific terms (such as ustring
and RTE) and post something that compiles!

class a_class{
public:
     int id;
     Glib::ustring fname;
};
std::vector<a_class>& my_class::my_method(){
a_class obj;
obj.id = 1;
obj.fname = "Me";

std::vector<a_class> v;
v.push_back(obj);

return v;
}


This return a reference to a temporary object which is a very bad idea.

void a_method(){
     std::vector<a_class> v;
     my_class obj;
     v = obj.my_method();
}

The program above gives me an class a_class{
public:
     int id;
     Glib::ustring fname;
};
std::vector<a_class>& my_class::my_method(){
a_class obj;
obj.id = 1;
obj.fname = "Me";

std::vector<a_class> v;
v.push_back(obj);

return v;
}


So does this.

void a_method(){
     std::vector<a_class> v;
     my_class obj;
     v = obj.my_method();
}

The program above gives me an RTE(Run Time Error), what am I doing wrong?what am I doing wrong?


It should also give you compiler warnings for the two cases above.

--
Ian Collins

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