Improved efficiency and code reuse with templates and pure functions - #241

Hello, thanks again for this new series of pull requests. Have you seen that they have all failed CI?

Hello, thanks again for this new series of pull requests.

Not quite new, just splitted the old #182 into multiple PRs.

no template named 'enable_if' in namespace 'std'
error: ‘enable_if’ in namespace ‘std’ does not name a template type

Old versions of C++ should be dropped.

@KOLANICH I find your PR very valuable but I think it may be easier to digest if split into again smaller parts.

@SRombauts What is your take on the points raised by KOLANICH? Lets take one aspect out, templates. Would you agree that adding stronger use of templates is a good thing? I recently had to fix something about the types in Statement::bind(), and I found what KOLANICH also found, that these methods are quite lengthy code for a thing that would become much shorter and cleaner with templates.

Would you accept a PR that adds stronger use of templates (for better code reuse and shortening of the existing code)?

I am closing this as outdated, but we can reopen the discussion on the basis of smaller scoped PRs