From 03efa074ab4ab9c43562a27c920d766d404d0b57 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 20 Oct 2015 16:52:39 +1100
Subject: [PATCH] maths: make limit constexpr

---
 maths.hpp | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/maths.hpp b/maths.hpp
index 27d12a72..287d328b 100644
--- a/maths.hpp
+++ b/maths.hpp
@@ -350,13 +350,10 @@ namespace util {
 
 // min/max clamping
 template <typename T, typename U, typename V>
-T
+constexpr T
 limit [[gnu::pure]] (const T val, const U lo, const V hi)
 {
-    CHECK_LE(
-        decltype (lo+hi) (lo),
-        decltype (hi+lo) (hi)
-    );
+    CHECK_LE (lo, hi);
 
     return val > hi ? hi:
            val < lo ? lo: