Cannot use map in factory pattern using c++ -


i trying create basic type wrapper project , want use factory create types depending on user input.

to illustrate code boolean type

class typeboolean :public generictypewrapper<bool>, public itypewrapper { public:     typeboolean(bool b = false) {     this->setvalue(b);     }   std::string gettypename() {     return "boolean"; }  static itypewrapper* __stdcall create(){ return new typeboolean(); } }; 

the generictypewrapper class getters , the setters , itypewrapper class abstract class gettypename function in it

now problem factory

using createtypefunction = std::function<itypewrapper*(void)>; class typefactory { private: static std::map<std::string, createtypefunction> creationfunctions;  typefactory() {      std::vector<std::string> listoftypenames = { "boolean" };      std::vector<createtypefunction> listofcreatefunctions = { typeboolean::create()     };      (unsigned int = 0; < listoftypenames.size(); i++)     {         creationfunctions.insert(listoftypenames[i], listofcreatefunctions[i]);     }  } }; 

now there more types problem reproduces 1 type well. error on following line

creationfunctions.insert(listoftypenames[i], listofcreatefunctions[i]); 

the error states :

error c2664: 'void   std::_tree<std::_tmap_traits<_kty,_ty,_pr,_alloc,false>>::insert(std::initializer_list<std::pair<const _kty,_ty>>)' : cannot convert argument 1 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>' 'std::_tree_const_iterator<std::_tree_val<std::_tree_simple_types<std::pair<const _kty,_ty>>>>' 

i not understand why error thrown, suggestion welcome.

the method map::insert not take key , value, iterator , value_type.

try line instead:

creationfunctions[listoftypenames[i]] = listofcreatefunctions[i]; 

are sure line compiles without warnings:

std::vector<createtypefunction> listofcreatefunctions = { typeboolean::create() }; 

looks fishy me, have expected &typeboolean::create maybe it's new c++11 initializer feature missed.


Comments

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

openid - Okta: Failed to get authorization code through API call -

thorough guide for profiling racket code -