On Thu, Oct 19, 2023 at 7:13 PM Yexuan Xiao via Std-Proposals
<std-proposals@lists.isocpp.org> wrote:
>
> I propose to add a new set of find functions for basic_string and basic_string_view, which take and return iterators instead of indices. These functions will have the same name as the existing ones, but with an “x” prefix.
>
> Before:
>
> if (auto start = s.find(c); start != std::string::npos)
> {
>   std::transform(s.begin() + start, s.begin() + start + c.size(), s.begin() + start, [](unsigned char c) { return std::toupper(c); });
> }
>
> After:
>
> if (auto start = s.xfind(c); start != s.end()) {
>   std::transform(start, start + c.size(), start, [](unsigned char c){ return std::toupper(c); });
> }
>
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As it currently stands, the `basic_string` API is pretty clear. Member
functions use *indicies*; if you want to do some operation on the
string using iterators, we have standard algorithms for those
operations.

We shouldn't treat algorithms like a last resort; they're a first
class feature of all ranges.
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