GRAPH does not print user-defined type of parameter.

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2 total messages Started by Ashvin Kannan Fri, 04 Aug 1995 19:33

#24

Author: Ashvin Kannan
Date: Fri, 04 Aug 1995 19:33

40 lines
1186 bytes

The parameterized graph (GRAPH) does not print the type of the parameter
for the method write(), if it is user-defined. I'm using LEDA 3.1.2 and g++
2.6.3. I know that it used to work for LEDA 3.0. Can someone please point
out the problem/workaround. Sample code and output follow.

Thanks!

  Ashvin
----------------------------------------------------------------------
#include <LEDA/graph.h>

class foo {int a;};

int main()
{
    GRAPH<int, string> G;
    G.write(cout);

    GRAPH<int, foo> fooG;
    fooG.write(cout);

}
----------------------------------------------------------------------
OUTPUT:

%a.out
LEDA.GRAPH
int
string
0
0
LEDA.GRAPH
int
unknown
0
0
%
----------------------------------------------------------------------

			=======

Re: GRAPH does not print user-defined type of parameter.

#37

Author: Marion Sperle
Date: Mon, 14 Aug 1995 09:49

30 lines
1312 bytes

Ashvin wrotes:

>The parameterized graph (GRAPH) does not print the type of the parameter
>for the method write(), if it is user-defined. I'm using LEDA 3.1.2 and g++
>2.6.3. I know that it used to work for LEDA 3.0. Can someone please point
>out the problem/workaround. Sample code and output follow.


>----------------------------------------------------------------------
>#include <LEDA/graph.h>

>class foo {int a;};

>int main()
>{
>    GRAPH<int, string> G;
>    G.write(cout);

>    GRAPH<int, foo> fooG;
>    fooG.write(cout);
>
>}

Do you have defined the function Print(const foo&, ostream&) as friend in your
class foo, which is called by the LEDA-method GRAPH.write() to linearize 
user-defined classes?

I hope I could help you
Marion

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