Compile time sizeof_array without using a macro

by

Try the following from here:

template <typename T, size_t N>
char ( &_ArraySizeHelper( T (&array)[N] ))[N];
#define mycountof( array ) (sizeof( _ArraySizeHelper( array ) ))

int testarray[10];
enum { testsize = mycountof(testarray) };

void test() {
    printf("The array count is: %d\n", testsize);
}

It should print out: “The array count is: 10”

More Related Contents:

  1. Is it possible to figure out the parameter type and return type of a lambda?
  2. Conveniently Declaring Compile-Time Strings in C++
  3. Does C++ support compile-time counters?
  4. Overload a C++ function according to the return value
  5. Compile time string hashing
  6. Programmatically create static arrays at compile time in C++
  7. SFINAE to check for inherited member functions
  8. Is stateful metaprogramming ill-formed (yet)?
  9. C++ SFINAE examples?
  10. Find out whether a C++ object is callable
  11. Enumerate over an enum in C++
  12. Can you make custom operators in C++?
  13. Is it possible to determine if a type is a scoped enumeration type?
  14. Best introduction to C++ template metaprogramming? [closed]
  15. C++: How to require that one template type is derived from the other
  16. How to know if a type is a specialization of std::vector?
  17. How can I expand call to variadic template base classes?
  18. Template Metaprogramming – Difference Between Using Enum Hack and Static Const
  19. C++11 is_same type trait for templates
  20. C++ Template Metaprogramming – Is it possible to output the generated code?
  21. What is the purpose of C++20 std::common_reference?
  22. calculating factorial using template meta-programming
  23. Obtain container type from (its) iterator type in C++ (STL)
  24. Template metaprogram converting type to unique number
  25. Why is partial specialization of a nested class template allowed, while complete isn’t?
  26. String-interning at compiletime for profiling
  27. Invalid operands to binary expression while implementing vector [closed]
  28. Difference between pointer and reference as thread parameter
  29. Checking if an iterator is valid
  30. SDL2: Fast Pixel Manipulation

Leave a Comment