mystery segmentation fault involving template

[nandor.sieben]

The following program causes a segmentation fault. If I break the
print line at the end into two separate print statement then there is
no segmentation fault. What is the problem? I am compiling it on
Ubuntu Gutsy.

using namespace
std;

#include
<iostream>
#include
<sstream>

template < class T > string all2string (T in, int
i)
{
stringstream
s;
s <<
in;
string
ss;
ss = s.str
();
while (ss.length () <
i)
ss = "0" +
ss;
return
ss;
}

typedef
struct
{
int
move;
int
depth;
}
Tdata;

string
Tdata2string (const Tdata &
data)
{
string s
=
all2string (data.depth, 0) + " " + all2string (data.move, 0) + "
";
return
s;
}

ostream & operator << (ostream & os, const Tdata &
data)
{
string s = Tdata2string
(data);
os <<
s;
}

main
()
{
Tdata
dat;
dat.depth =
0;
dat.move =
-1;


cout << dat <<"data
\n";
}

 

[Greg Herlihy]

The following program causes a segmentation fault. If I break the
print line at the end into two separate print statement then there is
no segmentation fault. What is the problem? I am compiling it on
Ubuntu Gutsy.
...

.
ostream & operator <<(ostream& os, const Tdata& data)
{
  string s = Tdata2string(data);
  os << s;
}

The last line of your operator<<() routine (above) should be

return os << s;

Greg

 

[nandor.sieben]

The last line of your operator<<() routine (above) should be

    return os << s;

Greg

It works, thank you very much.