| c++ Programming Glossary: deducibleOverloading operator<<: cannot bind lvalue to ?˜std::basic_ostream<char>&&??/a> http://stackoverflow.com/questions/10651161/overloading-operator-cannot-bind-lvalue-to-stdbasic-ostreamchar 
 C++, template argument can not be deduced http://stackoverflow.com/questions/6060824/c-template-argument-can-not-be-deduced  parameters   share improve this question   That is non deducible context. That is why the template argument cannot be deduced.. 
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