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Matthew: thanks for the QED :)

On Tue, Oct 9, 2018 at 3:52 PM <euloanty@live.com> wrote:

> throw an exception and catch it :)
>
> lol. better just use a coroutine.
>
> On Tuesday, October 9, 2018 at 10:27:40 PM UTC+8, Matthew Woehlke wrote:
>>
>> On 09/10/2018 08.05, eulo...@live.com wrote:
>> > I think it is painful and noisy to write iterators in order to support
>> > range-for loop.
>> > [...]
>> > bst<std::size_t> b;
>> > std::size_t sum(0);
>> > for(const auto &ele : b)    // will check whether the "for_each"
>> function
>> > is defined for the container. If it does have one, call this first.
>> >     sum+=ele;
>> >
>> > this will be equivalent to:
>> >
>> > bst<std::size_t> b;
>> > std::size_t sum(0);
>> > for_each(b,[&](const auto &ele)
>> > {
>> >     sum+=ele;
>> > });
>>
>> ...and how, exactly, will you implement a `break` with this? Especially
>> if your implementation of `for_each` is using recursive calls?
>>
>> --
>> Matthew
>>
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<div dir=3D"ltr">Matthew: thanks for the QED :)</div><br><div class=3D"gmai=
l_quote"><div dir=3D"ltr">On Tue, Oct 9, 2018 at 3:52 PM &lt;<a href=3D"mai=
lto:euloanty@live.com">euloanty@live.com</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex"><div dir=3D"ltr">throw an exception and catch it :)<di=
v><br></div><div>lol. better just use a coroutine.<br><br>On Tuesday, Octob=
er 9, 2018 at 10:27:40 PM UTC+8, Matthew Woehlke wrote:<blockquote class=3D=
"gmail_quote" style=3D"margin:0;margin-left:0.8ex;border-left:1px #ccc soli=
d;padding-left:1ex">On 09/10/2018 08.05, <a rel=3D"nofollow">eulo...@live.c=
om</a> wrote:
<br>&gt; I think it is painful and noisy to write iterators in order to sup=
port=20
<br>&gt; range-for loop.
<br>&gt; [...]
<br>&gt; bst&lt;std::size_t&gt; b;=20
<br>&gt; std::size_t sum(0);
<br>&gt; for(const auto &amp;ele : b) =C2=A0 =C2=A0// will check whether th=
e &quot;for_each&quot; function=20
<br>&gt; is defined for the container. If it does have one, call this first=
..
<br>&gt; =C2=A0 =C2=A0 sum+=3Dele;
<br>&gt;=20
<br>&gt; this will be equivalent to:
<br>&gt;=20
<br>&gt; bst&lt;std::size_t&gt; b;=20
<br>&gt; std::size_t sum(0);
<br>&gt; for_each(b,[&amp;](const auto &amp;ele)
<br>&gt; {
<br>&gt; =C2=A0 =C2=A0 sum+=3Dele;
<br>&gt; });
<br>
<br>...and how, exactly, will you implement a `break` with this? Especially
<br>if your implementation of `for_each` is using recursive calls?
<br>
<br>--=20
<br>Matthew
<br></blockquote></div></div>

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</blockquote></div>

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