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Consider


template<class T>
struct A
{
    A(T) {}
};

template<class T>
struct B : A<T>
{
  B(T t, int i)
  : A(t) //< nope
  {}
};

int main()
{
  A c(12); //< yep
}


This case is not considered in p1021
<http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2018/p1021r1.html>. Any
reason what this might be? An omission, a technical issue?
Because sooner or later people will wonder why it works in one context and
not in other.

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<div dir=3D"ltr">Consider<div><br></div><div><div><br></div><div><font face=
=3D"courier new, monospace">template&lt;class T&gt;</font></div><div><font =
face=3D"courier new, monospace">struct A=C2=A0</font></div><div><font face=
=3D"courier new, monospace">{</font></div><div><font face=3D"courier new, m=
onospace">=C2=A0 =C2=A0 A(T) {}</font></div><div><font face=3D"courier new,=
 monospace">};</font></div><div><font face=3D"courier new, monospace"><br><=
/font></div><div><font face=3D"courier new, monospace">template&lt;class T&=
gt;</font></div><div><font face=3D"courier new, monospace">struct B : A&lt;=
T&gt;=C2=A0</font></div><div><font face=3D"courier new, monospace">{=C2=A0<=
/font></div><div><font face=3D"courier new, monospace">=C2=A0 B(T t, int i)=
=C2=A0</font></div><div><font face=3D"courier new, monospace">=C2=A0 : A(t)=
 //&lt; nope</font></div><div><font face=3D"courier new, monospace">=C2=A0 =
{}=C2=A0</font></div><div><font face=3D"courier new, monospace">};</font></=
div><div><font face=3D"courier new, monospace"><br></font></div><div><font =
face=3D"courier new, monospace">int main()=C2=A0</font></div><div><font fac=
e=3D"courier new, monospace">{=C2=A0</font></div><div><font face=3D"courier=
 new, monospace">=C2=A0 A c(12); //&lt; yep</font></div><div><font face=3D"=
courier new, monospace">}</font></div></div><div><br></div><div><br></div><=
div>This case is not considered in=C2=A0<a href=3D"http://www.open-std.org/=
JTC1/SC22/WG21/docs/papers/2018/p1021r1.html">p1021</a>. Any reason what th=
is might be? An omission, a technical issue?</div><div>Because sooner or la=
ter people will wonder why it works in one context and not in other.</div><=
/div>

<p></p>

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ls+unsubscribe@isocpp.org</a>.<br />
To post to this group, send email to <a href=3D"mailto:std-proposals@isocpp=
..org">std-proposals@isocpp.org</a>.<br />
To view this discussion on the web visit <a href=3D"https://groups.google.c=
om/a/isocpp.org/d/msgid/std-proposals/16f99f8f-6596-4450-98f8-1bd7332cb21c%=
40isocpp.org?utm_medium=3Demail&utm_source=3Dfooter">https://groups.google.=
com/a/isocpp.org/d/msgid/std-proposals/16f99f8f-6596-4450-98f8-1bd7332cb21c=
%40isocpp.org</a>.<br />

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