Lambda questions

Is it possible to discern one-argument lambda expressions from two-argument expressions ? I would like to do something like this: template<typename UNARY_LAMBDA_FUNC> void f(UNARY_LAMBDA_FUNC ulf) { ulf(arg); } template<typename BINARY_LAMBDA_FUNC> void f(BINARY_LAMBDA_FUNC blf) { blf(arg1, arg2); } -Claus