[Bug c++/12446] New: Dereferencing iterators

["mjw at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12446

           Summary: Dereferencing iterators
           Product: gdb
           Version: archer
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned@sourceware.org
        ReportedBy: mjw@redhat.com


It would be nice if iterators could be dereferenced through ->.
Currently only * works.
Using -> will give a "There is no member or method" error.

Example:

$ cat foo.cpp
#include <vector>
#include <string>
#include <iostream>

int main(int argc, char **argv)
{
  std::pair<std::string, std::string> p ("first", "second");
  std::vector<std::pair<std::string, std::string> > v;

  v.push_back (p);

  std::vector<std::pair<std::string, std::string> >::iterator it = v.begin ();

  std::cout << it->first << " : " << it->second << std::endl;

  return 0;
}

$ g++ -g -o foo foo.cpp 

$ gdb ./foo
GNU gdb (GDB) Fedora (7.2-36.fc14)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /tmp/foo...done.
(gdb) break main
Breakpoint 1 at 0x400d74: file foo.cpp, line 7.
(gdb) run
Starting program: /tmp/foo 

Breakpoint 1, main (argc=1, argv=0x7fffffffe278) at foo.cpp:7
7      std::pair<std::string, std::string> p ("first", "second");
(gdb) n
8      std::vector<std::pair<std::string, std::string> > v;
(gdb) 
10      v.push_back (p);
(gdb) 
12      std::vector<std::pair<std::string, std::string> >::iterator it =
v.begin ();
(gdb) 
14      std::cout << it->first << " : " << it->second << std::endl;
(gdb) print it->first
There is no member or method named first.
(gdb) print (*it).first
$1 = "first"

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