Why should I initialize member variables in the order they’re declared in?

by

The reason is because they’re initialized in the order they’re declared in your class, not the order you initialize them in the constructor and it’s warning you that your constructor’s order won’t be used.

This is to help prevent errors where the initialization of b depends on a or vice-versa.

The reason for this ordering is because there is only one destructor, and it has to pick a “reverse order” to destroy the class member. In this case, the simplest solution was to use the order of declaration within the class to make sure that attributes were always destroyed in the correct reverse order.

More Related Contents:

  1. What’s the point of g++ -Wreorder?
  2. g++ How to get warning on ignoring function return value
  3. Understanding -Weffc++
  4. Can I make GCC warn on passing too-wide types to functions?
  5. Why does flowing off the end of a non-void function without returning a value not produce a compiler error?
  6. to_string is not a member of std, says g++ (mingw)
  7. Selectively disable GCC warnings for only part of a translation unit
  8. VSCode c++ task.json include path and libraries
  9. Why does typeid.name() return weird characters using GCC and how to make it print unmangled names?
  10. Static Data Member Initialization
  11. DSO missing from command line [duplicate]
  12. C++ templates, undefined reference
  13. openCV program compile error “libopencv_core.so.2.4: cannot open shared object file: No such file or directory” in ubuntu 12.04
  14. g++ does not show a ‘unused’ warning
  15. How to tell where a header file is included from?
  16. Compilation error: “stddef.h: No such file or directory”
  17. How to include omp.h in OS X?
  18. g++ variable size array no warning?
  19. GNU C++ how to check when -std=c++0x is in effect?
  20. c++ undefined reference to vtable
  21. C++ Boost: what’s the cause of this warning?
  22. Why “initializer-string for array of chars is too long” compiles fine in C & not in C++?
  23. Does the restrict keyword provide significant benefits in gcc/g++?
  24. Install gcc on linux with no root privilege
  25. What is a .h.gch file?
  26. “to_string” isn’t a member of “std”?
  27. C++ template function compiles in header but not implementation
  28. constexpr not working if the function is declared inside class scope
  29. get part of std::tuple
  30. std::array with aggregate initialization on g++ generates huge code

Leave a Comment