From 5761deb1ba178f9c88589a4184c5d4d00168603b Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Thu, 20 Jun 2024 08:52:33 +0200
Subject: [PATCH] refactor: `ice_point` and `zeroth_degree_Fahrenheit` now use
 `absolute` reference specifier

---
 src/systems/include/mp-units/systems/si/units.h | 2 +-
 src/systems/include/mp-units/systems/usc.h      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/systems/include/mp-units/systems/si/units.h b/src/systems/include/mp-units/systems/si/units.h
index 21813bb0..2730ab32 100644
--- a/src/systems/include/mp-units/systems/si/units.h
+++ b/src/systems/include/mp-units/systems/si/units.h
@@ -77,7 +77,7 @@ inline constexpr struct weber final : named_unit<"Wb", volt * second> {} weber;
 inline constexpr struct tesla final : named_unit<"T", weber / square(metre)> {} tesla;
 inline constexpr struct henry final : named_unit<"H", weber / ampere> {} henry;
 
-inline constexpr struct ice_point final : relative_point_origin<quantity_point{273'150 * delta(milli<kelvin>)}> {} ice_point;
+inline constexpr struct ice_point final : relative_point_origin<273'150 * absolute(milli<kelvin>)> {} ice_point;
 inline constexpr auto zeroth_degree_Celsius = ice_point;
 inline constexpr struct degree_Celsius final : named_unit<symbol_text{u8"°C", "`C"}, kelvin, zeroth_degree_Celsius> {} degree_Celsius;
 
diff --git a/src/systems/include/mp-units/systems/usc.h b/src/systems/include/mp-units/systems/usc.h
index 691f18d4..f9c1b3ba 100644
--- a/src/systems/include/mp-units/systems/usc.h
+++ b/src/systems/include/mp-units/systems/usc.h
@@ -118,7 +118,7 @@ inline constexpr struct troy_pound final : named_unit<"lb t", mag<12> * troy_onc
 inline constexpr struct inch_of_mercury final : named_unit<"inHg", mag_ratio<3'386'389, 1'000> * si::pascal> {} inch_of_mercury;
 
 // https://en.wikipedia.org/wiki/United_States_customary_units#Temperature
-inline constexpr struct zeroth_degree_Fahrenheit final : relative_point_origin<quantity_point{-32 * delta(mag_ratio<5, 9> * si::degree_Celsius)}> {} zeroth_degree_Fahrenheit;
+inline constexpr struct zeroth_degree_Fahrenheit final : relative_point_origin<-32 * absolute(mag_ratio<5, 9> * si::degree_Celsius)> {} zeroth_degree_Fahrenheit;
 inline constexpr struct degree_Fahrenheit final : named_unit<symbol_text{u8"°F", "`F"}, mag_ratio<5, 9> * si::degree_Celsius, zeroth_degree_Fahrenheit> {} degree_Fahrenheit;
 
 // clang-format on