view: add split_on overload for array delimiters

view.hpp

@@ -793,9 +793,9 @@ namespace cruft {
         auto const pos = std::find (std::begin (buffer), std::end (buffer), value);
         if (pos == std::end (buffer))
             return {
-            buffer,
+                buffer,
-            {std::end (buffer), std::end (buffer)}
+                {std::end (buffer), std::end (buffer)}
-        };
+            };
 
         return {
             { buffer.begin (), pos, },
@@ -804,6 +804,37 @@ namespace cruft {
     }
 
 
+    ///////////////////////////////////////////////////////////////////////////
+    /// Split a view at the first occurrence of the sub-string `value`.
+    ///
+    /// If no occurrence was found the returned pair will be the original view
+    /// and an empty view.
+    template <typename IteratorT, std::size_t N>
+    std::pair<view<IteratorT>, view<IteratorT>>
+    split_on (
+        view<IteratorT> const buffer,
+        typename std::iterator_traits<IteratorT>::value_type (&value)[N]
+    ) {
+        auto const pos = std::search (
+            std::begin (buffer),
+            std::end   (buffer),
+            std::begin (value),
+            std::end   (value)
+        );
+
+        if (pos == std::end (buffer))
+            return {
+                buffer,
+                {std::end (buffer), std::end (buffer)}
+            };
+
+        return {
+            { buffer.begin (), pos, },
+            { pos + N, buffer.end () }
+        };
+    }
+
+
     ///////////////////////////////////////////////////////////////////////////
     /// Returns a reference to a value of the designated type at the front of
     /// the word-view. if there is insufficient data for the extraction an