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Date: Mon, 19 May 2003 10:01:10 -0400
From: Hyman Rosen <hyrosen@mail.com>
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 comp.lang.java.advocacy,comp.object,comp.lang.ada,misc.misc,comp.software-eng
Subject: Re: Quality systems (Was: Using Ada for device drivers? (Was: the
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Date: 2003-05-19T10:01:10-04:00
List-Id: <comp.lang.ada>

Ole-Hjalmar Kristensen wrote:
> A small typo, and the loop will probably not do what you want.

I imagine that this is true of every programming language
ever invented.

> What stops someone from modifying i inside the loop?

Nothing.

> Also, begin() and end() only applies to STL type containers, not to
> plain arrays.

Godd C++ programmers don't use plain arrays. Remember, C++ isn't
Ada, where arrays are convenient to use :-) And if you insist,

     template <typename T, size_t N>
     T *begin(T (&array)[N]) { return array; }
     template <typename T, size_t N>
     T *end(T (&array)[N]) { return array + N; }
     template <typename T, size_t N>
     char (&sizer(T (&)[N]))[N];

Now if you have an array A, begin(A) and end(A) will give you
pointers to the beginning and end suitable for use as STL
iterators. And sizeof(sizer(A)) will give you its number of
elements as a compile-time static expression. You will get
compile-time errors if you try to apply them to pointers
instead of arrays, eliminating a common source of C errors.