U++ forum: Welcome to the forum

Search on this site

Search in forums

Home » Extra libraries, Code snippets, applications etc. » C++ language problems and code snippets » overloading operators rules

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

overloading operators rules [message #19431]

Wed, 03 December 2008 13:31

amando1957
Messages: 57
Registered: November 2007
Location: Wien/Vienna/Viden

Member

Hi to all.

There are rules for overloading operators in C++ I'm not sure i got them all. I do not ask for a syntax tutor, its meant so "what makes sense".

- keep track of semantics, so that the operator performs it is assumed to do: the op+ should add anything.
- avoid a given overload provided by the lang: "int % int" is here already.

Anyone can tell me some further rules recommended?
Thank you for any reply.

Martin

Report message to a moderator

Re: overloading operators rules [message #19432 is a reply to message #19431]

Wed, 03 December 2008 14:45

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

amando1957 wrote on Wed, 03 December 2008 07:31

Or, at least, keep the new semantics consistent Smile

Mirek

Report message to a moderator

Re: overloading operators rules [message #19438 is a reply to message #19432]

Wed, 03 December 2008 23:05

captainc
Messages: 278
Registered: December 2006
Location: New Jersey, USA

Experienced Member

This is more of an 'agreement' that is kept for a project team. I think we should make a Topic++ doc page about it so that we keep all U++ code consistent. Some sort of developer guidelines for contributing would be good.

Report message to a moderator

Re: overloading operators rules [message #21284 is a reply to message #19431]

Mon, 11 May 2009 16:47

piotr5
Messages: 107
Registered: November 2005

Experienced Member

I think a third rule would be to watch out for operator-priority-list. it wouldn't make much sense to define an operator which in combination with other operators needs to be put into brackets all the time. for example in boolean logic "*" is used for and, "+" is used for or, even though the two could be used the other way around, simply because it is more convenient to have a tighter binding between 2 things which live in an and-condition. (for example (a&b)|(c&d) is more natural for us to understand than (a|b)&(c|d)...)

another interesting rule which stl seems to obey is that some operators must have symmetric parameters-types. some algoritms of stl are only defined when both parameters of the operator are of the same type. I don't remember where I had this problem though, but I think it had something to do with the "<" operator...

Report message to a moderator

Previous Topic:	I don't get some aspects of STL ... [pointless rant]
Next Topic:	Basic library interface and separation problem

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Tue Apr 29 14:01:08 CEST 2025

Total time taken to generate the page: 0.00495 seconds