use more c++ style put api

[karlnapf]

No description provided.

[karlnapf]

Distance d = distance("EuclideanDistance", lhs=features_train, rhs=features_train)

becomes (in cpp)

auto d = wrap(distance("EuclideanDistance"));
d->put(Tag<decltype(features_train)>("lhs"), features_train);
d->put(Tag<decltype(features_train)>("rhs"), features_train);

[karlnapf]

@sorig it would be cool if I could do the same thing for the "MethodCall" secion in cpp.json. But currently all arguments are jointly hidden in $arguments so I cannot extract the name/value pair that a put call would get.

[karlnapf]

@sorig in addition @lisitsyn would like to move all Tag occurrences to the beginning of the script 😱

lisitsyn 11:50:39
HeikoS: I believe the next step is to move all the Tag<…> to the top of the script
@HeikoS 11:50:57
That will be tricky
although
maybe not
lisitsyn 11:51:12
HeikoS: some postprocessing
HeikoS: perfect would be to declare a namespace in the beginning
namespace tags { … }
and then put them there

[karlnapf]

@lisitsyn actually I realise this does not make any sense as the normal put call is already templated and the template that matches the argument is used .... :/

[karlnapf]

What we need is something for the construction of objects, in c++ we want to use constructors while in swig we want to use factories .... but later ...