What does this mean? Any help appreciated!

[pkirk25]

It looks like the Visuakl Studio Intellisense can see the various
functions but its compiler cannot. I am well out of my depth with this
error message.

report.obj : error LNK2019: unresolved external symbol "private: class
std::vector<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> >,class
std::allocator<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> > > > __thiscall
Table::v3_snapshot(class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> >)"
(?v3_snapshot@Table@@AAE?AV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@3@@Z)
referenced in function "public: class std::vector<class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> >,class std::allocator<class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> > > > __thiscall Table::snapshot(class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> >)"
(?snapshot@Table@@QAE?AV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@3@@Z)

//tables.h
public:
Table(string db_file);
vector<string> realm_list();
vector<string> snapshot(string realm);
int get_item_median(string item_code);
int get_item_snap(string item_code);
private:
bool isLoaded;
int version_number;
string get_realm_name(string); // return realm name if one is found
in string
vector<string> v4_snapshot(string realm);
vector<string> v3_snapshot(string realm);

//tables.cpp
....
#include "tables.h"
....
vector<string> Table::snapshot(string realm)
{
vector<string> snapshot;
if (4 == version_number)
{
snapshot = this->v4_snapshot(realm);
}
else
{
snapshot = this->v3_snapshot(realm);
}

return snapshot;

}

 

[pkirk25]

nt

 

[Mike Wahler]

It looks like the Visuakl Studio Intellisense can see the various
functions but its compiler cannot. I am well out of my depth with this
error message.

report.obj : error LNK2019: unresolved external symbol "private: class
std::vector<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> >,class
std::allocator<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> > > > __thiscall
Table::v3_snapshot(class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> >)"
(?v3_snapshot@Table@@AAE?AV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@3@@Z)
referenced in function "public: class std::vector<class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> >,class std::allocator<class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> > > > __thiscall Table::snapshot(class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> >)"
(?snapshot@Table@@QAE?AV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@3@@Z)

//tables.h
public:
Table(string db_file);
vector<string> realm_list();
vector<string> snapshot(string realm);
int get_item_median(string item_code);
int get_item_snap(string item_code);
private:
bool isLoaded;
int version_number;
string get_realm_name(string); // return realm name if one is found
in string
vector<string> v4_snapshot(string realm);
vector<string> v3_snapshot(string realm);

Here you promise to the compiler that there exists
somewhere the definition of a function named
'Table::v3_snapshot()'. Did you provide one?

//tables.cpp
...
#include "tables.h"
...
vector<string> Table::snapshot(string realm)

This signature states that this function will return

{
vector<string> snapshot;
if (4 == version_number)
{
snapshot = this->v4_snapshot(realm);

'snapshot()' is a function. Why are you trying to assign
something to it?

}
else
{
snapshot = this->v3_snapshot(realm);
}

return snapshot;

Why are you trying to return a type other than what
the function is defined to return?

}

-Mike

 

[Roland Pibinger]

It looks like the Visuakl Studio Intellisense can see the various
functions but its compiler cannot. I am well out of my depth with this
error message.

It probably means that you need to add tables.cpp to your project or
make file.

Good luck,
Roland Pibinger

 

[Victor Bazarov]

This signature states that this function will return


'snapshot()' is a function. Why are you trying to assign
something to it?

'snapshot' is also a local variable, hiding the name of the function
in which it's declared. Look at the first line inside the body of
this function.

int foo()
{
int foo = 42;
return foo;
}

int main()
{
return foo();
}

This practice is not recommended, but it's perfectly legal.

Why are you trying to return a type other than what
the function is defined to return?
Huh?

V

 

[pkirk25]

My mistake was to have the declarations done but to have the
implementations under under names. Kicked myself a bit when I saw that
I had forgotten to rename the fuctions after renaming the declarations.

Didn't help that the error message is a mouthful and that Intellisense
seemed to see things that were no longer there but untimately my fault.