carray.h File Reference

Utilities for c-style arrays. More...

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Macros
#define	XM_COUNTOF(array)   (sizeof(::xms::caArraySizeHelper(array)))
	Returns the number of elements of a C/C++ array. More...

Functions
template<typename T , size_t N>
char(&	xms::caArraySizeHelper (T(&array)[N]))[N]
	Helper to get the number of elements of a C/C++ array. More...

Detailed Description

Utilities for c-style arrays.

Copyright

(C) Copyright Aquaveo 2018. Distributed under FreeBSD License (See accompanying file LICENSE or https://aqaveo.com/bsd/license.txt)

Definition in file carray.h.

Macro Definition Documentation

XM_COUNTOF

#define XM_COUNTOF

(

array

)

(sizeof(::xms::caArraySizeHelper(array)))

Returns the number of elements of a C/C++ array.

It uses the XmArraySizeHelper template function.

Definition at line 15 of file carray.h.

Function Documentation

caArraySizeHelper()

template<typename T , size_t N>

char(& xms::caArraySizeHelper

(

T(&)

array[N]

)

)[N]

Helper to get the number of elements of a C/C++ array.

Parameters

array

Array of data

Returns

array size

Found this here: http://blogs.msdn.com/the1/pages/210011.aspx. Note that "it doesn't work with types defined inside a function because _ArraySizeHelper expects a type that is accessible in the global scope." In the future could change to a C++11 version from http://www.g-truc.net/post-0708.html:

template <typename T, std::size_t N>
constexpr std::size_t caCountOf(T const (&)[N]) noexcept
{
  return N;
}
#define XM_COUNTOF(array) (::xms::caCountOf(array)))