source: cpp/common/nonstd_stl.h @ 1303

// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 1999-2021  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

#ifndef _NONSTD_STL_H_
#define _NONSTD_STL_H_

//making STL more standard

#include <string>
using std::string;
#ifndef SHP //STL in the bada OS has no wstring
using std::wstring;
#endif

#include <vector>
using std::vector;


//below: not used since 2020 (these macros are replaced by std::ssize()), may be removed...

// ------------------- ARRAY_LENGTH -------------------

//old-fashioned macro, unprotected against the use of the pointer as "x"
//#define ARRAY_LENGTH(x) (sizeof(x)/sizeof((x)[0]))

//hacker macro that detects some of the misuse cases
//#define ARRAY_LENGTH(x) ((sizeof(x)/sizeof(0[x])) / ((size_t)(!(sizeof(x) % sizeof(0[x])))))

//template function by intermediate-level devs, as a function it unfortunately does not give a constant at compile time
//template<typename T, std::size_t N> inline std::size_t ARRAY_LENGTH( T(&)[N] ) { return N; } //"constexpr" dopiero w C++0x

//hacker templates: array of bytes of length N - as long as the array we are asking for...
//template <typename T, std::size_t N>
//char (&array_temp(T (&a)[N]))[N];

// As litb noted in comments, you need this overload to handle array rvalues
// correctly (e.g. when array is a member of a struct returned from function),
// since they won't bind to non-const reference in the overload above.
//template <typename T, std::size_t N>
//char (&array_temp(const T (&a)[N]))[N];

//...which can then be used in sizeof and thus we have const in compile-time. This is as useful as the old-fashioned macro above, but with full error control
//#define ARRAY_LENGTH(x) sizeof(array_temp(x))

//final and no longer needed version ;-) (c++17)
//#define ARRAY_LENGTH(x) int(std::size(x))
//(still room for improvement because unsigned=risky, ssize() upcoming since C++20)


#endif