Re: how to view content in stl vector

[Maik Beckmann <maikbeckmann at gmx dot de>]

Am Montag, 18. Juni 2007 10:52:00 schrieb AlpÃr JÃttner:
> In a running On Fri, 2007-06-15 at 21:52 +0200, Mark Kettenis wrote:
> > > Date: Tue, 12 Jun 2007 11:05:21 -0400
> > > From: kdsfinger@gmail.com
> > >
> > > hi, all
> > > How may I view the content in a stl vector in ddd? (or the command to
> > > print it in gdb?). It seems I can only view the first element. I
> > > searched google but did not find answer. Thanks for help.

Hello

If you add this to your .gdbinit 

<.gdbinit>
define dump_vector_simple

    set $it = $arg0.data()
    set $size = $arg0.size()
    set $end = $it + $size

    set $i = 0
    while ($it != $end)

        printf "[%u] == " , $i
        output *($it)
        printf "\n"

        set $it++
        set $i++
    end

end

define dump_vector_as_virtual_array

    set $it = $arg0.data()
    set $size = $arg0.size()

    output *$it@$size
    printf "\n"

end
</.gdbinit>

the gdb output  for this program
<test.cpp>
#include <vector>

int main(int argc, char **argv)
{

    std::vector<double> vec;

    for(int i = 0; i < 10; i++)
        vec.push_back(i+1);

    vec.data(); // dummy for gdb

    return 0; // breakpoint here
}
</test.cpp>

will be

<gdb>
dump_vector_simple vec
[0] == 1
[1] == 2
[2] == 3
[3] == 4
[4] == 5
[5] == 6
[6] == 7
[7] == 8
[8] == 9
[9] == 10
</gdb>

or  respectively

<gdb>
dump_vector_as_virtual_array vec
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
</gdb>


HTH, Maik Beckmann

PS: I'm using g++-4.1.2 and gdb-6.6