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From: David Abrahams (dave_at_[hidden])
Date: 2003-10-30 14:22:06

"Thorsten Ottosen" <nesotto_at_[hidden]> writes:

> "David Abrahams" <dave_at_[hidden]> wrote in message
>> "Thorsten Ottosen" <nesotto_at_[hidden]> writes:
>> >>what it wrong with this and why do you want to use int instead?
>> >
>> > Basically I want to use int whereever posisble so I don't have to
>> > worry about signed to unsiged conversions. The fact that the standard
>> > library does so/allows just makes programming harder that it has to
>> > be.
>> A tendency to use ints everywhere makes that a self-fulfilling
>> prophecy. You can turn on warnings to catch the problems. If you're
>> consistent about using unsigned for unsigned numbers, as with const,
>> you'll find that the actual cases where signed/unsigned conversions
>> need to be performed a much fewer.
> so where should I use unsigned?

It's somewhat of a religious issue, but I use unsigned integers
wherever I am representing a number that only makes sense when
positive, as in an index into an array, a size of a datatype, etc.
This is basically the same convention used by the standard libraries,
except where "old-fashioned" interfaces like getc() and string::npos
are concerned.

Dave Abrahams
Boost Consulting

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