On 14 January 2011 17:05, Jonathan Wakely wrote:
> On 14 January 2011 16:59, Tom Browder wrote:
>>
>> Two questions:
>>
>> 1. does it take any significant time difference to check for a 0
>> versus throw an exception (one argument against)?
>
> You have to check for 0 to decide whether to throw an exception or not.
> (The alternative is to not check, and segfault, which was the old
> behaviour in libstdc++)
>
> I couldn't care less about how slow the function is in the case of a
> precondition violation (null string, the exceptional path). We do care
> about the performance of the correct case (non-null string.)
>
>> 2. Isn't a '\0' an empty string in the string context?
>
> std::string("") is an empty string. std::string('\0') is not.
... std::string("\0") is also empty.
But passing '\0' to the string constructor creates a string containing a '\0'
