From 2340206b34a3a80eeb9ad0e4052b3b00ffb4e6ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Janiszewski?=
 <janisozaur@users.noreply.github.com>
Date: Thu, 6 Feb 2020 08:50:10 +0100
Subject: [PATCH] Place constexpr functions in anonymous namespace (#10651)

---
 src/openrct2/common.h | 37 ++++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 17 deletions(-)

diff --git a/src/openrct2/common.h b/src/openrct2/common.h
index 71e0267300..1933e861cd 100644
--- a/src/openrct2/common.h
+++ b/src/openrct2/common.h
@@ -51,26 +51,29 @@ const constexpr auto ror32 = ror<uint32_t>;
 const constexpr auto rol64 = rol<uint64_t>;
 const constexpr auto ror64 = ror<uint64_t>;
 
-constexpr bool is_power_of_2(int v)
+namespace
 {
-    return v && ((v & (v - 1)) == 0);
-}
+    [[maybe_unused]] constexpr bool is_power_of_2(int v)
+    {
+        return v && ((v & (v - 1)) == 0);
+    }
 
-// Rounds an integer down to the given power of 2. y must be a power of 2.
-constexpr int floor2(const int x, const int y)
-{
-    if (!is_power_of_2(y))
-        throw std::logic_error("floor2 should only operate on power of 2");
-    return x & ~(y - 1);
-}
+    // Rounds an integer down to the given power of 2. y must be a power of 2.
+    [[maybe_unused]] constexpr int floor2(const int x, const int y)
+    {
+        if (!is_power_of_2(y))
+            throw std::logic_error("floor2 should only operate on power of 2");
+        return x & ~(y - 1);
+    }
 
-// Rounds an integer up to the given power of 2. y must be a power of 2.
-constexpr int ceil2(const int x, const int y)
-{
-    if (!is_power_of_2(y))
-        throw std::logic_error("ceil2 should only operate on power of 2");
-    return (x + y - 1) & ~(y - 1);
-}
+    // Rounds an integer up to the given power of 2. y must be a power of 2.
+    [[maybe_unused]] constexpr int ceil2(const int x, const int y)
+    {
+        if (!is_power_of_2(y))
+            throw std::logic_error("ceil2 should only operate on power of 2");
+        return (x + y - 1) & ~(y - 1);
+    }
+} // namespace
 
 // Gets the name of a symbol as a C string
 #define nameof(symbol) #symbol