c++ - Vector of custom objects : Assign compilation failure -

i creating vector of custom objects , calling assign follows:

class myclass {         public:                 myclass() { cout<<"myclass def const"<<endl; }                 myclass(const myclass &mclass) {cout<<"default const"<<endl;}                 myclass& operator=(myclass &mclass) { cout<<"called overloaded = operator"<<endl; return mclass; } };   int main() {         myclass m;         cout<<"orginal object:"<<endl;         vector<myclass> vec1,vec2,vec3;         vec1.assign(10,m);         return 0; } 

relevant compilation errors:

/usr/lib/gcc/i386-redhat-linux/4.3.2/../../../../include/c++/4.3.2/bits/stl_vector.h:344:   instantiated ‘void std::vector<_tp, _alloc>::assign(size_t, const _tp&) [with _tp = myclass, _alloc = std::allocator<myclass>]’ test.cpp:52:   instantiated here /usr/lib/gcc/i386-redhat-linux/4.3.2/../../../../include/c++/4.3.2/bits/stl_algobase.h:686: error: no match ‘operator=’ in ‘* __first = __value’ test.cpp:43: note: candidates are: myclass& myclass::operator=(myclass&) 

i not sure missing since have overloaded = operator.

edit :

it seems signature wrong corrected below. understand valid signatures are:

(1) myclass& operator=( const myclass& rhs );  (2) myclass& operator=( myclass& rhs );  (3) myclass& operator=( myclass rhs );  (4) const myclass& operator=( const myclass& rhs );  (5) const myclass& operator=( myclass& rhs );  (6) const myclass& operator=( myclass rhs );  (7) myclass operator=( const myclass& rhs );  (8) myclass operator=( myclass& rhs );  (9) myclass operator=( myclass rhs );  

where restriction pass argument const reference defined?

the argument assignment operator must const, e.g.

myclass& operator=(const myclass &mclass)