Wrong code gen / missing warning / my mistake?

[Benjamin Thaut]

Am 10.09.2012 19:58, schrieb Rainer Schuetze:
> On 10.09.2012 19:08, Benjamin Thaut wrote:
>  > The following code
>  >
>  >
>  > bool endsWith(string str, string end)
>  > {
>  >      size_t to = str.length - end.length;
>  >      for(sizediff_t i = str.length - 1; i >= to; --i)
>
> Unfortunately, unsigned takes precedence over signed in any calculation,
> so "i >= to" is an unsigned comparison, where i is converted to unsigned
> first.
>
> A lot of calculation that involve size_t and implicite conversions or
> substractions are pretty error-prone.

If they are that error prone, shouldn't there be some kind of compiler 
warning?

Kind Regards
Benjamin Thaut