Added inductance

src/include/units/physical/dimensions.h

@@ -116,6 +116,9 @@ struct dim_magnetic_induction : derived_dimension<Child, U, exp<V, 1>, exp<T, 1>
 template<typename Child, Unit U, DimensionOf<dim_magnetic_induction> B, DimensionOf<dim_area> A>
 struct dim_magnetic_flux : derived_dimension<Child, U, exp<B, 1>, exp<A, 1>> {};
 
+template<typename Child, Unit U, DimensionOf<dim_magnetic_flux> F, DimensionOf<dim_electric_current> I>
+struct dim_inductance : derived_dimension<Child, U, exp<F, 1>, exp<I, -1>> {};
+
 }  // namespace physical
 
 template<typename T>
@@ -187,4 +190,7 @@ concept MagneticInduction = physical::QuantityOf<T, physical::dim_magnetic_induc
 template <typename T>
 concept MagneticFlux = physical::QuantityOf<T, physical::dim_magnetic_flux>;
 
+template <typename T>
+concept Inductance = physical::QuantityOf<T, physical::dim_inductance>;
+
 }  // namespace units

src/include/units/physical/si/inductance.h

@@ -0,0 +1,68 @@
+// The MIT License (MIT)
+//
+// Copyright (c) 2018 Mateusz Pusz
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#pragma once
+
+#include <units/physical/dimensions.h>
+#include <units/physical/si/magnetic_flux.h>
+#include <units/physical/si/current.h>
+#include <units/quantity.h>
+
+namespace units::si {
+
+struct henry : named_unit<henry, "H", prefix> {};
+
+struct millihenry : prefixed_unit<millihenry, milli, henry> {};
+struct microhenry : prefixed_unit<microhenry, micro, henry> {};
+struct nanohenry : prefixed_unit<nanohenry, nano, henry> {};
+struct picohenry : prefixed_unit<picohenry, pico, henry> {};
+
+struct dim_inductance : physical::dim_inductance<dim_inductance, henry, dim_magnetic_flux, dim_electric_current> {};
+
+template<Unit U, Scalar Rep = double>
+using inductance = quantity<dim_inductance, U, Rep>;
+
+inline namespace literals {
+
+// H
+constexpr auto operator"" q_H(unsigned long long l) { return inductance<henry, std::int64_t>(l); }
+constexpr auto operator"" q_H(long double l) { return inductance<henry, long double>(l); }
+
+// mH
+constexpr auto operator"" q_mH(unsigned long long l) { return inductance<millihenry, std::int64_t>(l); }
+constexpr auto operator"" q_mH(long double l) { return inductance<millihenry, long double>(l); }
+
+// µH
+constexpr auto operator"" q_uH(unsigned long long l) { return inductance<microhenry, std::int64_t>(l); }
+constexpr auto operator"" q_uH(long double l) { return inductance<microhenry, long double>(l); }
+
+// nH
+constexpr auto operator"" q_nH(unsigned long long l) { return inductance<nanohenry, std::int64_t>(l); }
+constexpr auto operator"" q_nH(long double l) { return inductance<nanohenry, long double>(l); }
+
+// pH
+constexpr auto operator"" q_pH(unsigned long long l) { return inductance<picohenry, std::int64_t>(l); }
+constexpr auto operator"" q_pH(long double l) { return inductance<picohenry, long double>(l); }
+
+}  // namespace literals
+
+}  // namespace units::si

test/unit_test/runtime/fmt_units_test.cpp

@@ -41,6 +41,7 @@
 #include "units/physical/si/voltage.h"
 #include "units/physical/si/magnetic_induction.h"
 #include "units/physical/si/magnetic_flux.h"
+#include "units/physical/si/inductance.h"
 #include "units/format.h"
 #include <catch2/catch.hpp>
 
@@ -212,6 +213,13 @@ TEST_CASE("fmt::format on synthesized unit symbols", "[text][fmt]")
   SECTION("magnetic flux")
   {
     CHECK(fmt::format("{}", 1q_Wb) == "1 Wb");
+    CHECK(fmt::format("{}", 1q_G) == "1 G");
+  }
+
+  SECTION("inductance")
+  {
+    CHECK(fmt::format("{}", 1q_H) == "1 H");
+    CHECK(fmt::format("{}", 1q_mH) == "1 mH");
   }
 
   SECTION("addition with common ratio")

test/unit_test/static/si_test.cpp

@@ -42,6 +42,7 @@
 #include <units/physical/si/volume.h>
 #include <units/physical/si/magnetic_induction.h>
 #include <units/physical/si/magnetic_flux.h>
+#include <units/physical/si/inductance.h>
 #include <utility>
 
 namespace {
@@ -213,6 +214,17 @@ static_assert(microweber::symbol == basic_symbol_text("µWb", "uWb"));
 static_assert(nanoweber::symbol == "nWb");
 static_assert(picoweber::symbol == "pWb");
 
+// inductance
+
+static_assert(1q_H == 1q_Wb / 1q_A);
+static_assert(1q_V == 1q_H * 1q_A / 1q_s);
+static_assert(1q_J == 1q_H * 1q_A * 1q_A);
+
+static_assert(millihenry::symbol == "mH");
+static_assert(microhenry::symbol == basic_symbol_text("µH", "uH"));
+static_assert(nanohenry::symbol == "nH");
+static_assert(picohenry::symbol == "pH");
+
 /* ************** DERIVED DIMENSIONS IN TERMS OF BASE UNITS **************** */
 
 // velocity