[Boost-users] How can I use boost::lambda bind libray in a template

From: yinglcs2_at_[hidden]
Date: 2006-02-22 17:39:45

I have a function which takes a map (with int as key)
and put all keys into another vector:

void keySet2(map<int, string> aMap, vector<int>&
keySet) {
        transform( aMap.begin(), aMap.end(),
back_inserter(keySet), bind(&map<int,
string>::value_type::first,  _1)  );
}

But when I turn that find function into a template, I
have compile erro. So is it possible to use boost in a
template?

here is my code:
template <class T>
void keySet(T& aMap, vector<int>& keySet) {
        transform( aMap.begin(), aMap.end(),
back_inserter(keySet), bind(&T::value_type::first, 
_1)  );
        
}

here is the error:
g++ -O0 -g3 -Wall -c -fmessage-length=0
-oBlockGrouper.o ../BlockGrouper.cpp
../Utils.h: In function ‘void keySet(T&,
std::vector<int, std::allocator<int> >&)’:
../Utils.h:149: error: ‘_1’ was not declared in
this scope

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