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It would be great to have functions any_of, none_of, all_of what works with
initializer lists

now it is:

 int a = 0, b = 0, c = 1;
 std::initializer_list<int> arr = {a,b,c};
 if (std::any_of(std::begin(arr), std::end(arr), [](int x){return x > 0;}))
     std::cout<< "any > 0" <<std::endl;

proposal is:

 int a = 0, b = 0, c = 1;
 if (std::any_of({a,b,c}, [](int x){return x > 0;}))
     std::cout<< "any > 0" <<std::endl;

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<div dir=3D"ltr">It would be great to have functions any_of, none_of, all_o=
f what works with initializer lists<br><br>now it is:<div><br></div><div><d=
iv class=3D"prettyprint" style=3D"border: 1px solid rgb(187, 187, 187); wor=
d-wrap: break-word; background-color: rgb(250, 250, 250);"><code class=3D"p=
rettyprint"><div class=3D"subprettyprint"><span style=3D"color: #000;" clas=
s=3D"styled-by-prettify">=C2=A0</span><span style=3D"color: #008;" class=3D=
"styled-by-prettify">int</span><span style=3D"color: #000;" class=3D"styled=
-by-prettify"> a </span><span style=3D"color: #660;" class=3D"styled-by-pre=
ttify">=3D</span><span style=3D"color: #000;" class=3D"styled-by-prettify">=
 </span><span style=3D"color: #066;" class=3D"styled-by-prettify">0</span><=
span style=3D"color: #660;" class=3D"styled-by-prettify">,</span><span styl=
e=3D"color: #000;" class=3D"styled-by-prettify"> b </span><span style=3D"co=
lor: #660;" class=3D"styled-by-prettify">=3D</span><span style=3D"color: #0=
00;" class=3D"styled-by-prettify"> </span><span style=3D"color: #066;" clas=
s=3D"styled-by-prettify">0</span><span style=3D"color: #660;" class=3D"styl=
ed-by-prettify">,</span><span style=3D"color: #000;" class=3D"styled-by-pre=
ttify"> c </span><span style=3D"color: #660;" class=3D"styled-by-prettify">=
=3D</span><span style=3D"color: #000;" class=3D"styled-by-prettify"> </span=
><span style=3D"color: #066;" class=3D"styled-by-prettify">1</span><span st=
yle=3D"color: #660;" class=3D"styled-by-prettify">;</span><span style=3D"co=
lor: #000;" class=3D"styled-by-prettify"><br>=C2=A0std</span><span style=3D=
"color: #660;" class=3D"styled-by-prettify">::</span><span style=3D"color: =
#000;" class=3D"styled-by-prettify">initializer_list</span><span style=3D"c=
olor: #080;" class=3D"styled-by-prettify">&lt;int&gt;</span><span style=3D"=
color: #000;" class=3D"styled-by-prettify"> arr </span><span style=3D"color=
: #660;" class=3D"styled-by-prettify">=3D</span><span style=3D"color: #000;=
" class=3D"styled-by-prettify"> </span><span style=3D"color: #660;" class=
=3D"styled-by-prettify">{</span><span style=3D"color: #000;" class=3D"style=
d-by-prettify">a</span><span style=3D"color: #660;" class=3D"styled-by-pret=
tify">,</span><span style=3D"color: #000;" class=3D"styled-by-prettify">b</=
span><span style=3D"color: #660;" class=3D"styled-by-prettify">,</span><spa=
n style=3D"color: #000;" class=3D"styled-by-prettify">c</span><span style=
=3D"color: #660;" class=3D"styled-by-prettify">};</span><span style=3D"colo=
r: #000;" class=3D"styled-by-prettify"><br>=C2=A0</span><span style=3D"colo=
r: #008;" class=3D"styled-by-prettify">if</span><span style=3D"color: #000;=
" class=3D"styled-by-prettify"> </span><span style=3D"color: #660;" class=
=3D"styled-by-prettify">(</span><span style=3D"color: #000;" class=3D"style=
d-by-prettify">std</span><span style=3D"color: #660;" class=3D"styled-by-pr=
ettify">::</span><span style=3D"color: #000;" class=3D"styled-by-prettify">=
any_of</span><span style=3D"color: #660;" class=3D"styled-by-prettify">(</s=
pan><span style=3D"color: #000;" class=3D"styled-by-prettify">std</span><sp=
an style=3D"color: #660;" class=3D"styled-by-prettify">::</span><span style=
=3D"color: #008;" class=3D"styled-by-prettify">begin</span><span style=3D"c=
olor: #660;" class=3D"styled-by-prettify">(</span><span style=3D"color: #00=
0;" class=3D"styled-by-prettify">arr</span><span style=3D"color: #660;" cla=
ss=3D"styled-by-prettify">),</span><span style=3D"color: #000;" class=3D"st=
yled-by-prettify"> std</span><span style=3D"color: #660;" class=3D"styled-b=
y-prettify">::</span><span style=3D"color: #008;" class=3D"styled-by-pretti=
fy">end</span><span style=3D"color: #660;" class=3D"styled-by-prettify">(</=
span><span style=3D"color: #000;" class=3D"styled-by-prettify">arr</span><s=
pan style=3D"color: #660;" class=3D"styled-by-prettify">),</span><span styl=
e=3D"color: #000;" class=3D"styled-by-prettify"> </span><span style=3D"colo=
r: #660;" class=3D"styled-by-prettify">[](</span><span style=3D"color: #008=
;" class=3D"styled-by-prettify">int</span><span style=3D"color: #000;" clas=
s=3D"styled-by-prettify"> x</span><span style=3D"color: #660;" class=3D"sty=
led-by-prettify">){</span><span style=3D"color: #008;" class=3D"styled-by-p=
rettify">return</span><span style=3D"color: #000;" class=3D"styled-by-prett=
ify"> x </span><span style=3D"color: #660;" class=3D"styled-by-prettify">&g=
t;</span><span style=3D"color: #000;" class=3D"styled-by-prettify"> </span>=
<span style=3D"color: #066;" class=3D"styled-by-prettify">0</span><span sty=
le=3D"color: #660;" class=3D"styled-by-prettify">;}))</span><span style=3D"=
color: #000;" class=3D"styled-by-prettify"><br>=C2=A0 =C2=A0 =C2=A0std</spa=
n><span style=3D"color: #660;" class=3D"styled-by-prettify">::</span><span =
style=3D"color: #000;" class=3D"styled-by-prettify">cout</span><span style=
=3D"color: #660;" class=3D"styled-by-prettify">&lt;&lt;</span><span style=
=3D"color: #000;" class=3D"styled-by-prettify"> </span><span style=3D"color=
: #080;" class=3D"styled-by-prettify">&quot;any &gt; 0&quot;</span><span st=
yle=3D"color: #000;" class=3D"styled-by-prettify"> </span><span style=3D"co=
lor: #660;" class=3D"styled-by-prettify">&lt;&lt;</span><span style=3D"colo=
r: #000;" class=3D"styled-by-prettify">std</span><span style=3D"color: #660=
;" class=3D"styled-by-prettify">::</span><span style=3D"color: #000;" class=
=3D"styled-by-prettify">endl</span><span style=3D"color: #660;" class=3D"st=
yled-by-prettify">;</span></div></code></div><div><br></div></div><div>prop=
osal is:<br><br><div class=3D"prettyprint" style=3D"border: 1px solid rgb(1=
87, 187, 187); word-wrap: break-word; background-color: rgb(250, 250, 250);=
"><code class=3D"prettyprint"><div class=3D"subprettyprint"><span style=3D"=
color: #000;" class=3D"styled-by-prettify">=C2=A0</span><span style=3D"colo=
r: #008;" class=3D"styled-by-prettify">int</span><span style=3D"color: #000=
;" class=3D"styled-by-prettify"> a </span><span style=3D"color: #660;" clas=
s=3D"styled-by-prettify">=3D</span><span style=3D"color: #000;" class=3D"st=
yled-by-prettify"> </span><span style=3D"color: #066;" class=3D"styled-by-p=
rettify">0</span><span style=3D"color: #660;" class=3D"styled-by-prettify">=
,</span><span style=3D"color: #000;" class=3D"styled-by-prettify"> b </span=
><span style=3D"color: #660;" class=3D"styled-by-prettify">=3D</span><span =
style=3D"color: #000;" class=3D"styled-by-prettify"> </span><span style=3D"=
color: #066;" class=3D"styled-by-prettify">0</span><span style=3D"color: #6=
60;" class=3D"styled-by-prettify">,</span><span style=3D"color: #000;" clas=
s=3D"styled-by-prettify"> c </span><span style=3D"color: #660;" class=3D"st=
yled-by-prettify">=3D</span><span style=3D"color: #000;" class=3D"styled-by=
-prettify"> </span><span style=3D"color: #066;" class=3D"styled-by-prettify=
">1</span><span style=3D"color: #660;" class=3D"styled-by-prettify">;</span=
><span style=3D"color: #000;" class=3D"styled-by-prettify"><br>=C2=A0</span=
><span style=3D"color: #008;" class=3D"styled-by-prettify">if</span><span s=
tyle=3D"color: #000;" class=3D"styled-by-prettify"> </span><span style=3D"c=
olor: #660;" class=3D"styled-by-prettify">(</span><span style=3D"color: #00=
0;" class=3D"styled-by-prettify">std</span><span style=3D"color: #660;" cla=
ss=3D"styled-by-prettify">::</span><span style=3D"color: #000;" class=3D"st=
yled-by-prettify">any_of</span><span style=3D"color: #660;" class=3D"styled=
-by-prettify">({</span><span style=3D"color: #000;" class=3D"styled-by-pret=
tify">a</span><span style=3D"color: #660;" class=3D"styled-by-prettify">,</=
span><span style=3D"color: #000;" class=3D"styled-by-prettify">b</span><spa=
n style=3D"color: #660;" class=3D"styled-by-prettify">,</span><span style=
=3D"color: #000;" class=3D"styled-by-prettify">c</span><span style=3D"color=
: #660;" class=3D"styled-by-prettify">},</span><span style=3D"color: #000;"=
 class=3D"styled-by-prettify"> </span><span style=3D"color: #660;" class=3D=
"styled-by-prettify">[](</span><span style=3D"color: #008;" class=3D"styled=
-by-prettify">int</span><span style=3D"color: #000;" class=3D"styled-by-pre=
ttify"> x</span><span style=3D"color: #660;" class=3D"styled-by-prettify">)=
{</span><span style=3D"color: #008;" class=3D"styled-by-prettify">return</s=
pan><span style=3D"color: #000;" class=3D"styled-by-prettify"> x </span><sp=
an style=3D"color: #660;" class=3D"styled-by-prettify">&gt;</span><span sty=
le=3D"color: #000;" class=3D"styled-by-prettify"> </span><span style=3D"col=
or: #066;" class=3D"styled-by-prettify">0</span><span style=3D"color: #660;=
" class=3D"styled-by-prettify">;}))</span><span style=3D"color: #000;" clas=
s=3D"styled-by-prettify"><br>=C2=A0 =C2=A0 =C2=A0std</span><span style=3D"c=
olor: #660;" class=3D"styled-by-prettify">::</span><span style=3D"color: #0=
00;" class=3D"styled-by-prettify">cout</span><span style=3D"color: #660;" c=
lass=3D"styled-by-prettify">&lt;&lt;</span><span style=3D"color: #000;" cla=
ss=3D"styled-by-prettify"> </span><span style=3D"color: #080;" class=3D"sty=
led-by-prettify">&quot;any &gt; 0&quot;</span><span style=3D"color: #000;" =
class=3D"styled-by-prettify"> </span><span style=3D"color: #660;" class=3D"=
styled-by-prettify">&lt;&lt;</span><span style=3D"color: #000;" class=3D"st=
yled-by-prettify">std</span><span style=3D"color: #660;" class=3D"styled-by=
-prettify">::</span><span style=3D"color: #000;" class=3D"styled-by-prettif=
y">endl</span><span style=3D"color: #660;" class=3D"styled-by-prettify">;</=
span></div></code></div></div></div>

<p></p>

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.

2016-02-25 12:19 GMT+01:00  <pushkoff@gmail.com>:
> It would be great to have functions any_of, none_of, all_of what works with
> initializer lists
>
> now it is:
>
>  int a = 0, b = 0, c = 1;
>  std::initializer_list<int> arr = {a,b,c};
>  if (std::any_of(std::begin(arr), std::end(arr), [](int x){return x > 0;}))
>      std::cout<< "any > 0" <<std::endl;
>
> proposal is:
>
>  int a = 0, b = 0, c = 1;
>  if (std::any_of({a,b,c}, [](int x){return x > 0;}))
>      std::cout<< "any > 0" <<std::endl;

This feature would automatically fall out of the range TS,

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/n4569.pdf

because an std::initializer_list meets the requirements for the
InputRange concept (See the any_of declaration accepting ranges on
page 122).

- Daniel

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On Thursday, February 25, 2016 at 7:43:46 PM UTC+8, Daniel Kr=C3=BCgler wro=
te:
>
> 2016-02-25 12:19 GMT+01:00  <push...@gmail.com <javascript:>>:=20
> > It would be great to have functions any_of, none_of, all_of what works=
=20
> with=20
> > initializer lists=20
> >=20
> > now it is:=20
> >=20
> >  int a =3D 0, b =3D 0, c =3D 1;=20
> >  std::initializer_list<int> arr =3D {a,b,c};=20
> >  if (std::any_of(std::begin(arr), std::end(arr), [](int x){return x >=
=20
> 0;}))=20
> >      std::cout<< "any > 0" <<std::endl;=20
> >=20
> > proposal is:=20
> >=20
> >  int a =3D 0, b =3D 0, c =3D 1;=20
> >  if (std::any_of({a,b,c}, [](int x){return x > 0;}))=20
> >      std::cout<< "any > 0" <<std::endl;=20
>
> This feature would automatically fall out of the range TS,=20
>
=20
Not the one in OP's code, though, because you can't deduce=20
std::initializer_list out of {a, b, c}. For that to work, you'll need an=20
overload taking a std::initializer_list<T>.

I'm not sure providing such an overload is a good idea, though, since=20
constructing the backing array is a lot of copying.

--=20
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g.

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<div dir=3D"ltr"><br><br>On Thursday, February 25, 2016 at 7:43:46 PM UTC+8=
, Daniel Kr=C3=BCgler wrote:<blockquote class=3D"gmail_quote" style=3D"marg=
in: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">20=
16-02-25 12:19 GMT+01:00 =C2=A0&lt;<a href=3D"javascript:" target=3D"_blank=
" gdf-obfuscated-mailto=3D"VT-SF9ORAgAJ" rel=3D"nofollow" onmousedown=3D"th=
is.href=3D&#39;javascript:&#39;;return true;" onclick=3D"this.href=3D&#39;j=
avascript:&#39;;return true;">push...@gmail.com</a>&gt;:
<br>&gt; It would be great to have functions any_of, none_of, all_of what w=
orks with
<br>&gt; initializer lists
<br>&gt;
<br>&gt; now it is:
<br>&gt;
<br>&gt; =C2=A0int a =3D 0, b =3D 0, c =3D 1;
<br>&gt; =C2=A0std::initializer_list&lt;int&gt; arr =3D {a,b,c};
<br>&gt; =C2=A0if (std::any_of(std::begin(arr), std::end(arr), [](int x){re=
turn x &gt; 0;}))
<br>&gt; =C2=A0 =C2=A0 =C2=A0std::cout&lt;&lt; &quot;any &gt; 0&quot; &lt;&=
lt;std::endl;
<br>&gt;
<br>&gt; proposal is:
<br>&gt;
<br>&gt; =C2=A0int a =3D 0, b =3D 0, c =3D 1;
<br>&gt; =C2=A0if (std::any_of({a,b,c}, [](int x){return x &gt; 0;}))
<br>&gt; =C2=A0 =C2=A0 =C2=A0std::cout&lt;&lt; &quot;any &gt; 0&quot; &lt;&=
lt;std::endl;
<br>
<br>This feature would automatically fall out of the range TS,=C2=A0<br></b=
lockquote><div>=C2=A0</div><div>Not the one in OP&#39;s code, though, becau=
se you can&#39;t deduce std::initializer_list out of {a, b, c}. For that to=
 work, you&#39;ll need an overload taking a std::initializer_list&lt;T&gt;.=
<br></div><div><br></div><div>I&#39;m not sure providing such an overload i=
s a good idea, though, since constructing the backing array is a lot of cop=
ying.</div></div>

<p></p>

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40isocpp.org?utm_medium=3Demail&utm_source=3Dfooter">https://groups.google.=
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.

2016-02-28 10:44 GMT+01:00 T. C. <rs2740@gmail.com>:
> Not the one in OP's code, though, because you can't deduce
> std::initializer_list out of {a, b, c}. For that to work, you'll need an
> overload taking a std::initializer_list<T>.

Agreed, I didn't look careful enough at the OP's code.

- Daniel

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.