SimpleNode: convenience builder functions

[caleridas]

Add constructor as well as helper function to create simple and its operator in a single call. Allow to move the created operator in (instead of copying it).

[caleridas]

I would have preferred different argumet ordering for the convenience function, i.e.:
CreateOpNode(, { <operands< })

but variadic template arguments must be last, and there are only hacky ways using lots of template magic to have it otherwise.

[phate]

A few rough corners that do not make sense to me, as well as some minor nitpicks that I do not expect to be fixed if you do not want to.

[phate]

Looks generally fine to me. One final thought: Would it be possible to move these functions into the SimpleNode class instead of having them as free standing functions?

Usage would then be something like this: SimpleNode::CreateOpNode<>(....)

I also do not particularly like the name CreateOpNode, but I guess a simple Create() or CreateNode() won't work as it would clash with the others already being there.

[caleridas]

Looks generally fine to me. One final thought: Would it be possible to move these functions into the SimpleNode class instead of having them as free standing functions?

Usage would then be something like this: SimpleNode::CreateOpNode<>(....)

I also do not particularly like the name CreateOpNode, but I guess a simple Create() or CreateNode() won't work as it would clash with the others already being there.

I would actually prefer free functions, I would prefer if everything in the nodes is concerned with their properties and access, but this convenience helper actually crosses "operator" and "node" so it is not exactly clear where it belongs to.

[phate]

I would actually prefer free functions, I would prefer if everything in the nodes is concerned with their properties and access, but this convenience helper actually crosses "operator" and "node" so it is not exactly clear where it belongs to.

Fair point.