From ed964292c7e11d86f4163ff201a594dfc0427e73 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Tue, 16 Apr 2019 10:36:07 +0200
Subject: [PATCH] quantity_cast() made constexpr

---
 src/include/units/quantity.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/include/units/quantity.h b/src/include/units/quantity.h
index ff1bafa0..34d3ac45 100644
--- a/src/include/units/quantity.h
+++ b/src/include/units/quantity.h
@@ -97,7 +97,7 @@ namespace units {
 
   template<Quantity To, Dimension D, Unit U, Number Rep>
       requires std::experimental::ranges::Same<typename To::dimension, D> constexpr
-  To quantity_cast(const quantity<D, U, Rep>& q)
+  constexpr To quantity_cast(const quantity<D, U, Rep>& q)
   {
     using c_ratio = std::ratio_divide<typename U::ratio, typename To::unit::ratio>;
     using c_rep = std::common_type_t<typename To::rep, Rep, intmax_t>;