From dd9f1b20cb7e1a3889256c9473af3c79700bf7a2 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Tue, 9 Apr 2019 17:22:15 +0200
Subject: [PATCH] literals namespace made inline

---
 src/include/units/si/frequency.h | 4 +---
 src/include/units/si/length.h    | 2 +-
 src/include/units/si/time.h      | 4 +---
 src/include/units/si/velocity.h  | 4 +---
 test/test_quantity.cpp           | 2 --
 test/test_units.cpp              | 2 +-
 6 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/src/include/units/si/frequency.h b/src/include/units/si/frequency.h
index d54f0ac8..319a0a05 100644
--- a/src/include/units/si/frequency.h
+++ b/src/include/units/si/frequency.h
@@ -54,9 +54,7 @@ namespace units {
   template<typename T>
   concept bool Frequency =  Quantity<T> && std::experimental::ranges::Same<typename T::dimension, dimension_frequency>;
 
-  // ...
-
-  namespace literals {
+  inline namespace literals {
 
     // mHz
     constexpr auto operator""_mHz(unsigned long long l) { return frequency<millihertz, std::int64_t>(l); }
diff --git a/src/include/units/si/length.h b/src/include/units/si/length.h
index 9381110f..48766f21 100644
--- a/src/include/units/si/length.h
+++ b/src/include/units/si/length.h
@@ -64,7 +64,7 @@ namespace units {
   template<typename T>
   concept bool Length = Quantity<T> && std::experimental::ranges::Same<typename T::dimension, dimension_length>;
 
-  namespace literals {
+  inline namespace literals {
 
     // mm
     constexpr auto operator""_mm(unsigned long long l) { return length<millimeter, std::int64_t>(l); }
diff --git a/src/include/units/si/time.h b/src/include/units/si/time.h
index 3d412cd6..02e65bac 100644
--- a/src/include/units/si/time.h
+++ b/src/include/units/si/time.h
@@ -55,9 +55,7 @@ namespace units {
   template<typename T>
   concept bool Time = Quantity<T> && std::experimental::ranges::Same<typename T::dimension, dimension_time>;
 
-  // ...
-
-  namespace literals {
+  inline namespace literals {
 
     // ns
     constexpr auto operator""_ns(unsigned long long l) { return time<nanosecond, std::int64_t>(l); }
diff --git a/src/include/units/si/velocity.h b/src/include/units/si/velocity.h
index 8233bc8e..379bfcc2 100644
--- a/src/include/units/si/velocity.h
+++ b/src/include/units/si/velocity.h
@@ -46,9 +46,7 @@ namespace units {
   template<typename T>
   concept bool Velocity = Quantity<T> && std::experimental::ranges::Same<typename T::dimension, dimension_velocity>;
 
-  // ...
-
-  namespace literals {
+  inline namespace literals {
 
     // mps
     constexpr auto operator""_mps(unsigned long long l) { return velocity<meter_per_second, std::int64_t>(l); }
diff --git a/test/test_quantity.cpp b/test/test_quantity.cpp
index 00aebc3a..9bb00ed9 100644
--- a/test/test_quantity.cpp
+++ b/test/test_quantity.cpp
@@ -26,7 +26,6 @@
 #include <chrono>
 
 using namespace units;
-using namespace units::literals;
 
 namespace {
 
@@ -76,7 +75,6 @@ namespace std {
 namespace {
 
   using namespace units;
-  using namespace units::literals;
 
   // class invariants
 
diff --git a/test/test_units.cpp b/test/test_units.cpp
index 5f089570..9900a73f 100644
--- a/test/test_units.cpp
+++ b/test/test_units.cpp
@@ -27,8 +27,8 @@
 #include <utility>
 
 namespace {
+
   using namespace units;
-  using namespace units::literals;
 
   // frequency