c++ - How to get access to iterator of some type? -


i have code:

#include "nodesedgestriangles.h"   triangles chain_triangulation( const listlimitations& input_list_limitations ) {     edges edges_of_planar_graph;     ( const_it_listlimitations location = input_list_limitations.begin(); location !=    input_list_limitations.end(); ++location )         //error line         edges_of_planar_graph.insert( edges_of_planar_graph.end(), location->begin(), location->end() );  }    triangles chain_triangulation;     return chain_triangulation; }

compiler give me error:

error c2839: invalid return type 'std::list<_ty> *const *' overloaded 'operator ->'

the variable input_list_limitations list of pointers other lists. means iterator "points" pointer list, when dereference iterator (with unary * or ->) have pointer , not instance. need double dereference able call begin , end functions, like

(*location)->begin()

explanation:

*location dereferences iterator, give pointer std::list. -> operator used dereference pointer.


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