From b7b8a0bf936b0601edb50227836cc6affe1abfc4 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Wed, 20 Oct 2021 18:52:13 +0200
Subject: [PATCH] fix: CTAD for aliases fixed

---
 src/core/include/units/quantity.h       | 3 +++
 test/unit_test/static/quantity_test.cpp | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/core/include/units/quantity.h b/src/core/include/units/quantity.h
index 3d47d440..a5ebf3ce 100644
--- a/src/core/include/units/quantity.h
+++ b/src/core/include/units/quantity.h
@@ -383,6 +383,9 @@ public:
 };
 
 // CTAD
+template<typename D, typename U, typename Rep>
+explicit(false) quantity(Rep&&) -> quantity<D, U, Rep>;
+
 template<Representation Rep>
 explicit(false) quantity(Rep) -> quantity<dim_one, one, Rep>;
 
diff --git a/test/unit_test/static/quantity_test.cpp b/test/unit_test/static/quantity_test.cpp
index 12567ba7..d00d03d2 100644
--- a/test/unit_test/static/quantity_test.cpp
+++ b/test/unit_test/static/quantity_test.cpp
@@ -273,6 +273,9 @@ static_assert(get_length_derived_quantity() == 1_q_m);
 // CTAD
 /////////
 
+static_assert(std::is_same_v<decltype(units::aliases::isq::si::m(123))::rep, int>);
+static_assert(std::is_same_v<decltype(units::aliases::isq::si::m(123.))::rep, double>);
+
 static_assert(is_same_v<decltype(quantity{length<metre, int>(123)}), length<metre, int>>);
 static_assert(is_same_v<decltype(quantity{speed<metre_per_second>(123)}), speed<metre_per_second>>);
 // static_assert(is_same_v<decltype(length{length<metre, int>(123)}), length<metre, int>>);   // TODO gcc ICE