[Minor] Add utility to split strings on some character

diff --git a/src/libutil/cxx/util.hxx b/src/libutil/cxx/util.hxx
index 6faba92778bbaf4feea0940827a2ed87a86750d0..b852b38d580ba31000c8ecf0a9b7c4226bcd4d1c 100644 (file)
--- a/src/libutil/cxx/util.hxx
+++ b/src/libutil/cxx/util.hxx
@@ -94,6 +94,24 @@ inline auto string_foreach_line(const S &input, const F &functor)
        }
 }
 
+template<class S, typename std::enable_if_t<std::is_constructible_v<std::string_view, S>, bool> = true>
+inline auto string_split_on(const S &input, std::string_view::value_type chr) -> std::pair<std::string_view, std::string_view>
+{
+       auto pos = std::find(std::begin(input), std::end(input), chr);
+
+       if (pos != input.end()) {
+               auto first = std::string_view{std::begin(input), pos};
+               while (*pos == chr && pos != input.end()) {
+                       ++pos;
+               }
+               auto last = std::string_view{pos, std::end(input)};
+
+               return {first, last};
+       }
+
+       return {std::string_view{input}, std::string_view{}};
+}
+
 /**
  * Enumerate for range loop
  */