From 93ddf85a7b8f77215dda84ad83f60cb3f56b9552 Mon Sep 17 00:00:00 2001
From: Zhihao Yuan <lichray@gmail.com>
Date: Sun, 17 Nov 2019 20:05:25 -0600
Subject: [PATCH] Factor out any_cast_container

---
 include/argparse.hpp | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/include/argparse.hpp b/include/argparse.hpp
index fe23527..9321a93 100644
--- a/include/argparse.hpp
+++ b/include/argparse.hpp
@@ -341,12 +341,7 @@ private:
   template <typename CONTAINER>
   details::enable_if_container<CONTAINER> get() const {
     if (!mValues.empty()) {
-      using ValueType = typename CONTAINER::value_type;
-      CONTAINER tResult;
-      std::transform(
-          std::begin(mValues), std::end(mValues), std::back_inserter(tResult),
-          [](const auto &value) { return std::any_cast<ValueType>(value); });
-      return tResult;
+      return any_cast_container<CONTAINER>(mValues);
     }
     if (mDefaultValue.has_value()) {
       return std::any_cast<CONTAINER>(mDefaultValue);
@@ -354,6 +349,17 @@ private:
     throw std::logic_error("No value provided");
   }
 
+  template <typename T>
+  static auto any_cast_container(const std::vector<std::any> &aOperand) -> T {
+    using ValueType = typename T::value_type;
+
+    T tResult;
+    std::transform(
+        begin(aOperand), end(aOperand), std::back_inserter(tResult),
+        [](const auto &value) { return std::any_cast<ValueType>(value); });
+    return tResult;
+  }
+
   std::vector<std::string> mNames;
   std::string mUsedName;
   std::string mHelp;