From 74ce228b1e3e756174c2e75579bfe500701ee570 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 20 Jun 2019 18:44:26 +0200
Subject: compat: sprinkle constexpr

---
 compat/enum-operators.hpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/compat/enum-operators.hpp b/compat/enum-operators.hpp
index 188a081d..e4f81a39 100644
--- a/compat/enum-operators.hpp
+++ b/compat/enum-operators.hpp
@@ -3,7 +3,7 @@
 #include <type_traits>
 
 #define OTR_FLAGS_OP2(type, op)                                         \
-    inline type operator op (type a, type b)                            \
+    constexpr inline type operator op (type a, type b)                  \
     {                                                                   \
         using t_ = std::underlying_type_t<type>;                        \
         return type(t_((a)) op t_((b)));                                \
@@ -14,14 +14,14 @@
     type operator op (type, u) = delete // end
 
 #define OTR_FLAGS_OP1(type, op)                                         \
-    inline type operator op (type x)                                    \
+    constexpr inline type operator op (type x)                          \
     {                                                                   \
         using t_ = std::underlying_type_t<type>;                        \
         return type(op t_((x)));                                        \
     } // end
 
 #define OTR_FLAGS_ASSIGN_OP(type, op)                                   \
-    inline type& operator op ## = (type& lhs, type rhs)                 \
+    constexpr inline type& operator op ## = (type& lhs, type rhs)       \
     {                                                                   \
         using t_ = std::underlying_type_t<decltype(rhs)>;               \
         lhs = type(t_((lhs)) op t_((rhs)));                             \
-- 
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