From e13d3fdf4d4754c85e7e05e98592afb71d22be3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?louiz=E2=80=99?= <louiz@louiz.org>
Date: Mon, 22 Aug 2016 21:29:22 +0200
Subject: Move get_first_non_empty to louloulibs/utils

---
 louloulibs/utils/get_first_non_empty.cpp | 11 +++++++++++
 louloulibs/utils/get_first_non_empty.hpp | 20 ++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 louloulibs/utils/get_first_non_empty.cpp
 create mode 100644 louloulibs/utils/get_first_non_empty.hpp

(limited to 'louloulibs')

diff --git a/louloulibs/utils/get_first_non_empty.cpp b/louloulibs/utils/get_first_non_empty.cpp
new file mode 100644
index 0000000..5b3bedb
--- /dev/null
+++ b/louloulibs/utils/get_first_non_empty.cpp
@@ -0,0 +1,11 @@
+#include <utils/get_first_non_empty.hpp>
+
+bool is_empty(const std::string& val)
+{
+  return val.empty();
+}
+
+bool is_empty(const int& val)
+{
+  return val == 0;
+}
diff --git a/louloulibs/utils/get_first_non_empty.hpp b/louloulibs/utils/get_first_non_empty.hpp
new file mode 100644
index 0000000..a38f5fb
--- /dev/null
+++ b/louloulibs/utils/get_first_non_empty.hpp
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <string>
+
+bool is_empty(const std::string& val);
+bool is_empty(const int& val);
+
+template <typename T>
+T get_first_non_empty(T&& last)
+{
+  return last;
+}
+
+template <typename T, typename... Args>
+T get_first_non_empty(T&& first, Args&&... args)
+{
+  if (!is_empty(first))
+    return first;
+  return get_first_non_empty(std::forward<Args>(args)...);
+}
-- 
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