Refactoring patches

[Richard Kimberly Heck]

On 10/16/20 6:11 AM, Pavel Sanda wrote:
> On Fri, Oct 16, 2020 at 10:56:02AM +0300, Yuriy Skalko wrote:
>> And here are new refactoring patches.
> The headers are good to go, for const changes I did not followed
> much the previous discussion, i.e. not sure whether changes
> 'int const & p' should not become 'int cost p'
> instead of  'int p' (but I don't care much about these to be honest).

It is probalby worth retaining the 'const' for passing by value. It'd be 
meaningless for return values.

Riki