BloombergLP::bdlb::StringRefUtil::strrstrCaseless

Return a bslstl::StringRef object referring to the last occurrence in (the referent data of) the specified string at which (the referent data of) the specified subString is found using case-insensitive comparisons, or bslstl::StringRef() if there is no such occurrence. See {Caseless Comparisons}. If subString has zero length then a zero-length reference to the end of string is returned (i.e., bslstl::StringRef(string.end(), 0));