MESSAGE
| DATE | 2016-11-08 |
| FROM | Christopher League
|
| SUBJECT | Re: [Learn] C++ signature ambiguity
|
From learn-bounces-at-nylxs.com Tue Nov 8 15:36:41 2016
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From: Christopher League
To: learn-at-nylxs.com, Mohammed Ghriga
In-Reply-To:
References:
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Date: Tue, 08 Nov 2016 15:36:34 -0500
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Subject: Re: [Learn] C++ signature ambiguity
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Unclear to me why one might need both, but I tried removing the
reference version and it died with a similar error somewhere else. Maybe
I just needed to push the change further, into member classes.
I think it's perfectly fine to decide either that every generic type
parameter is a pointer (what Java does), or that it's passed by value...
and then the client code can specify it either as `foo` if it expects
copies, or `foo` if it expects dynamic allocation. The duplication
of supporting every variation of `T`, `T&`, `const T&`, and `const T&
const` (is that a thing?) is damn annoying.
CL
Ruben Safir writes:
> I need to separate these two method signatures=20
>
>
> #include
> #include
> #include "nodes.h"
> using namespace std;
>
> int main(int argv, char ** argc)
> {
> tree::state a{"A", 65500};
> tree::state c{"C", 0};
> tree::state g{"G", 65500};
> tree::state t{"T", 65500};
>
> vector< tree::state > posible_states =3D {a,c,g,t};
>
> tree::Pstates node_status{posible_states};
> tree::NODE cr1{"T01", 3};
> tree::NODE cl1{"T00",2};
> // tree::NODE root{"T0",1};
>
> // tree::NODE > cr1{"T01", 3};
> // tree::NODE > cl1{"T00",2};
> tree::NODE > root{"T0",node_status};
> return 0;
> }
>
>
>
> template
> class NODE{
> public:
> //=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3DLIFECYCLE=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> /* Constructor */
> NODE( std::string xt, unk &x , NODE *xcl=3D 0, NODE *xcr =3D=
0, NODE *xp =3D 0 );
> NODE( std::string xt, unk x , NODE *xcl=3D 0, NODE *xcr =3D =
0, NODE *xp =3D 0 );
> ~NODE();
>=20=20=20=20=20=20=20
>
>
> I'm open to ideas
>
>
> http://www.nylxs.com/docs/thesis/src/fitch/fitch.tgz
> is the code
>
>
> --=20
> So many immigrant groups have swept through our town
> that Brooklyn, like Atlantis, reaches mythological
> proportions in the mind of the world - RI Safir 1998
> http://www.mrbrklyn.com=20
>
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
> http://www.nylxs.com - Leadership Development in Free Software
> http://www2.mrbrklyn.com/resources - Unpublished Archive
> http://www.coinhangout.com - coins!
> http://www.brooklyn-living.com
>
> Being so tracked is for FARM ANIMALS and and extermination camps,
> but incompatible with living as a free human being. -RI Safir 2013
> _______________________________________________
> Learn mailing list
> Learn-at-nylxs.com
> http://lists.mrbrklyn.com/mailman/listinfo/learn
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1.0, user-scalable=3Dyes">
Unclear to me why one might need both, but I tried removing the referenc=
e version and it died with a similar error somewhere else. Maybe I just nee=
ded to push the change further, into member classes.
I think it=E2=80=99s perfectly fine to decide either that every generic =
type parameter is a pointer (what Java does), or that it=E2=80=99s passed b=
y value=E2=80=A6 and then the client code can specify it either as fo=
o<T> if it expects copies, or foo<T*> if it=
expects dynamic allocation. The duplication of supporting every variation =
of T, T&, const T&, and e>const T& const (is that a thing?) is damn annoying.
CL
Ruben Safir ruben-at-mrbrklyn.com=
writes:
I need to separate these two method signatures
include
include
include =E2=80=9Cnodes.h=E2=80=9D
using namespace std;
int main(int argv, char ** argc) { tree::state a{=E2=80=9CA=E2=80=
=9D, 65500}; tree::state c{=E2=80=9CC=E2=80=9D, 0}; tree::state g=
{=E2=80=9CG=E2=80=9D, 65500}; tree::state t{=E2=80=9CT=E2=80=9D, 65500=
};
vector< tree::state > posible_states =3D {a,c,g,t};
tree::Pstates node_status{posible_states}; tree::NODE cr1{=E2=
=80=9CT01=E2=80=9D, 3}; tree::NODE cl1{=E2=80=9CT00=E2=80=9D,2}; // tr=
ee::NODE root{=E2=80=9CT0=E2=80=9D,1};
// tree::NODE > cr1{=E2=80=9CT01=E2=80=9D, 3}; // tree::=
NODE > cl1{=E2=80=9CT00=E2=80=9D,2}; tree::NODEes > root{=E2=80=9CT0=E2=80=9D,node_status}; return 0; }
template class NODE{ public: //=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3DLIFECYCLE=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D /* Constructor / NODE( std::string xt, unk =
&x , NODE xcl=3D 0, NODE xcr =3D 0, NODE x=
p =3D 0 ); NODE( std::string xt, unk x , NODE xcl=3D 0, NODE =
xcr =3D 0, NODE *xp =3D 0 ); ~NODE();
I=E2=80=99m open to ideas
http://www.nylxs.com/docs/thesis/src/fitch/fitch.tgz is the code
=E2=80=93 So many immigrant groups have swept through our town that Broo=
klyn, like Atlantis, reaches mythological proportions in the mind of the wo=
rld - RI Safir 1998 http://www.mrbrklyn.com
DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 http://www.nylxs.=
com - Leadership Development in Free Software http://www2.mrbrklyn.com/reso=
urces - Unpublished Archive http://www.coinhangout.com - coins! http://www.=
brooklyn-living.com
Being so tracked is for FARM ANIMALS and and extermination camps, but in=
compatible with living as a free human being. -RI Safir 2013 ______________=
_________________________________ Learn mailing list Learn-at-nylxs.com http:/=
/lists.mrbrklyn.com/mailman/listinfo/learn
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