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//fills my vector with pointers.
//(some are pointing places, others are set to nullptr
vector<Tree_NodeT*> xml_trees {Build_Tree_List(program_options->Get_Files())};
//time to print them
for (auto tree = xml_trees.begin(); tree != xml_trees.end(); ++tree){
if (*tree){
(*tree)->Print(std::cout,4);
}
}
//this worked! No Segfaults!
//time to print them again
for (auto tree : xml_trees){
if (tree){
tree->Print(std::cout,4);
}
}
//Crash! Segfault.
为什么第二个循环有段错误，而第一个循环没有？