C++新特性

1.C++11新特性

• Variadic Templates

• Spaces in Template Expressions

  vector<list<int> > //ok in each C++ version
  vector<list<int>> // before c++ 11 error error: ‘>>’ should be ‘> >’ within a nested template argument list,c++11后可以正常通过
  

• nullptr and nullptr_t

• Automatic Type Deduction with auto

• Uniform Initialization

• initializer_list

• explicit for ctors taking more than one argument

• range-based for statement

  for(decl:col) {
      statement
  }
  

• =default,=delete

  如果你自行定义了一个ctor,那么编译器就不会给你一个default ctor 如果强制加上=default,就可以重新获得并使用default ctor.