Re: [boost] cstring_view

On 13.05.22 20:39, Marshall Clow via Boost wrote:

On May 13, 2022, at 11:18 AM, Peter Dimov via Boost wrote:

...

In what scenarios will it not give you a null-terminated string?

char arr[6] = “hello"; cstring_view csv(arr); assert(strlen(csv.data())) == 5); arr[5] = ‘!’; assert(strlen(csv.data())) == 5); // boom

— Marshall

PS. It promises to give you a null-terminated string, but has no way to actually guarantee that.

That's an issue with views in general, not just cstring_view. std::string s = "hello"; string_view sv = s; assert(sv.size() == 5); s += "!"; assert(sv.size() == 5); // boom It is the responsibility of the creator of a view to ensure that the object being viewed does not change in a way that breaks the invariants of the view while the view is in use. -- Rainer Deyke (rainerd@eldwood.com)