From 8c483aa805eb3da25be685ee875555662cab1038 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?louiz=E2=80=99?= <louiz@louiz.org>
Date: Sat, 17 Mar 2018 17:33:29 +0100
Subject: Re-apply "Use if constexpr to make things a lot more readable"

This reverts commit d0e3c71b91f1a1c1780158789fd42b8ac7209495.
---
 src/database/index.hpp | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

(limited to 'src/database/index.hpp')

diff --git a/src/database/index.hpp b/src/database/index.hpp
index 30766ab..094a36a 100644
--- a/src/database/index.hpp
+++ b/src/database/index.hpp
@@ -8,19 +8,16 @@
 namespace
 {
 template <std::size_t N=0, typename... T>
-typename std::enable_if<N == sizeof...(T), void>::type
-add_column_name(std::string&)
-{ }
-
-template <std::size_t N=0, typename... T>
-typename std::enable_if<N < sizeof...(T), void>::type
-add_column_name(std::string& out)
+void add_column_name(std::string& out)
 {
-  using ColumnType = typename std::remove_reference<decltype(std::get<N>(std::declval<std::tuple<T...>>()))>::type;
-  out += ColumnType::name;
-  if (N != sizeof...(T) - 1)
-    out += ",";
-  add_column_name<N+1, T...>(out);
+  if constexpr(N < sizeof...(T))
+    {
+      using ColumnType = typename std::remove_reference<decltype(std::get<N>(std::declval<std::tuple<T...>>()))>::type;
+      out += ColumnType::name;
+      if (N != sizeof...(T) - 1)
+        out += ",";
+      add_column_name<N + 1, T...>(out);
+    }
 }
 }
 
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