Re: any_of, all_of, none_of

From:
=?ISO-8859-1?Q?Daniel_Kr=FCgler?= <daniel.kruegler@googlemail.com>
Newsgroups:
comp.lang.c++.moderated
Date:
Sat, 27 Aug 2011 18:07:14 -0700 (PDT)
Message-ID:
<j3arir$r9u$1@dont-email.me>
Am 27.08.2011 14:55, schrieb gast128@hotmail.com:

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On 27 aug, 04:18, Daniel Kr?gler<daniel.krueg...@googlemail.com>
wrote:

On 2011-08-26 00:52, gast...@hotmail.com wrote:

<snip>
[&](int i) { return i == 3; }


 We already have some sort of
templated STL extensions library with all / all_if and I was thinking
just to replace the implementation with STL variants.


Can you please provide a concrete example? I'm not sure that I can agree
with that as written.

Greetings from Bremen,

- Daniel Kr?gler


How about (almost a literal copy of Boost's STLAlgorithmExtensions /
AllAlgorithm):

template<typename For, typename ValueType>
bool all(For first, For last, const ValueType& rValue)
{
    //Note: empty range [first, last> returns true

    for (; first != last; ++first)
    {
       if (*first != rValue)
       {
         return false;
       }
    }

    return true;
}


I should have made it clearer that my question was referring to the
first part of your assertion:

"That would be an option, except that this will not work when it is a
template (if I recollect correctly)."

I certainly understand that as of the current specification a lambda
closure can not be a template, but how does this restriction compare
with your original example, where you seem to ask for a default version?

Greetings from Bremen,

- Daniel Kr?gler

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