Problem with libstdc++-v3.0.96 and #include <functional>

[POKAM Christian]

When compiling this small file (MemFun.cpp) with the latest
libstdc++v3.0.96, I get this error :

MemFun.cpp:29: `compose1' undeclared (first use this function) 

Is compose1 not part of <functional>? 

gcc -v:
 Reading specs from
/usr/local/gcc3/lib/gcc-lib/i686-pc-linux-gnu/3.0.3/specs
Configured with: ../gcc-3.0.3/configure --prefix=/usr/local/gcc3
--enable-language
s=c,c++ --enable-threads=posix
Thread model: posix
gcc version 3.0.3 

//MemFun.cpp 

#include "NumStringGen.h"
#include <algorithm>
#include <vector>
#include <string>
#include <iostream>
#include <functional> 
using namespace std; 

int main() {
  const int sz = 9;
  vector<string> vs(sz);
  // Fill it with random number strings:
  generate(vs.begin(), vs.end(), NumStringGen());
  copy(vs.begin(), vs.end(),
    ostream_iterator<string>(cout, "\t"));
  cout << endl;
  vector<double> vd;
  transform(vs.begin(), vs.end(), back_inserter(vd),
    compose1(ptr_fun(atof),
      mem_fun_ref(&string::c_str)));
  copy(vd.begin(), vd.end(),
    ostream_iterator<double>(cout, "\t"));
  cout << endl;
} ///:~
--------------------------------------------
//NumStringGen.h 

#ifndef NUMSTRINGGEN_H
#define NUMSTRINGGEN_H
#include <string>
#include <cstdlib>
#include <ctime> 

class NumStringGen {
  const int sz; // Number of digits to make
public:
  NumStringGen(int ssz = 5) : sz(ssz) {
    std::srand(std::time(0));
  }
  std::string operator()() {
    static char n[] = "0123456789";
    const int nsz = 10;
    std::string r(sz, ' ');
    for(int i = 0; i < sz; i++)
      if(i == sz/2)
        r[i] = '.'; // Insert a decimal point
      else
        r[i] = n[std::rand() % nsz];
    return r;
  }
};
#endif // NUMSTRINGGEN_H ///:~