From 95afbe5174be402b681cd98ea83cc063cd23f5c0 Mon Sep 17 00:00:00 2001
From: Federico Igne <undyamon@disroot.org>
Date: Wed, 20 Dec 2023 00:54:49 +0100
Subject: aoc(2319): Aplenty

---
 2023/include/util.h | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

(limited to '2023/include')

diff --git a/2023/include/util.h b/2023/include/util.h
index 3152719..100c9ed 100644
--- a/2023/include/util.h
+++ b/2023/include/util.h
@@ -7,6 +7,7 @@
 #include <string>
 #include <string_view>
 #include <type_traits>
+#include <vector>
 
 namespace util
 {
@@ -49,7 +50,7 @@ inline void trim(std::string_view& view)
  * @param the callable object.
  */
 template<const char* delim, typename Accumulate>
-void accumulate(std::string_view& view, Accumulate acc)
+void accumulate(std::string_view view, Accumulate acc)
 {
     size_t from{}, to;
     std::string elem;
@@ -68,6 +69,25 @@ void accumulate(std::string_view& view, Accumulate acc)
     }
 }
 
+/** @brief Split a string view according to a delimiter.
+ *
+ * Specialized version of `util::accumulate` collecting the split
+ * `std::string_view` in a `std::vector`.
+ *
+ * @tparam delim the delimiter to split the string view.
+ * @param view the string view.
+ *
+ * @see util::accumulate;
+ */
+template<const char* delim>
+std::vector<std::string_view> split(std::string_view view)
+{
+    std::vector<std::string_view> v;
+    auto callback = [&v](const std::string_view& s) { v.push_back(s); };
+    accumulate<delim>(view, callback);
+    return v;
+}
+
 /** @brief Discard element from stream by type.
  *
  * @tparam T the type of the element to discard.
-- 
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