feat: dimension text output added

Resolves #421

test/static/CMakeLists.txt

@@ -38,6 +38,7 @@ add_library(
     # custom_rep_test_min_expl.cpp
     custom_rep_test_min_impl.cpp
     dimension_test.cpp
+    dimension_symbol_test.cpp
     fixed_string_test.cpp
     fractional_exponent_quantity.cpp
     hep_test.cpp

test/static/dimension_symbol_test.cpp

@@ -0,0 +1,52 @@
+// 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.
+
+#include <mp-units/systems/isq/isq.h>
+
+namespace {
+
+using namespace mp_units;
+
+using enum text_encoding;
+
+static_assert(dimension_symbol(dimension_one) == "1");
+
+// base dimensions
+static_assert(dimension_symbol(isq::dim_length) == "L");
+static_assert(dimension_symbol(isq::dim_thermodynamic_temperature) == "Θ");
+static_assert(dimension_symbol<dimension_symbol_formatting{.encoding = ascii}>(isq::dim_thermodynamic_temperature) ==
+              "O");
+
+// derived dimensions
+static_assert(dimension_symbol(isq::speed.dimension) == "LT⁻¹");
+static_assert(dimension_symbol<dimension_symbol_formatting{.encoding = ascii}>(isq::speed.dimension) == "LT^-1");
+static_assert(dimension_symbol(isq::power.dimension) == "L²MT⁻³");
+static_assert(dimension_symbol<dimension_symbol_formatting{.encoding = ascii}>(isq::power.dimension) == "L^2MT^-3");
+
+static_assert(dimension_symbol(pow<123>(isq::dim_length)) == "L¹²³");
+static_assert(dimension_symbol(pow<1, 2>(isq::dim_length)) == "L^(1/2)");
+static_assert(dimension_symbol(pow<3, 5>(isq::dim_length)) == "L^(3/5)");
+static_assert(dimension_symbol(pow<123>(isq::speed.dimension)) == "L¹²³T⁻¹²³");
+static_assert(dimension_symbol(pow<1, 2>(isq::speed.dimension)) == "L^(1/2)T^-(1/2)");
+static_assert(dimension_symbol(pow<3, 5>(isq::speed.dimension)) == "L^(3/5)T^-(3/5)");
+
+}  // namespace

test/static/unit_symbol_test.cpp

@@ -30,8 +30,6 @@ using namespace mp_units;
 using namespace mp_units::si;
 using namespace mp_units::iec80000;
 
-#if __cpp_lib_constexpr_string && (!defined MP_UNITS_COMP_GCC || MP_UNITS_COMP_GCC > 11)
-
 using enum text_encoding;
 using enum unit_symbol_solidus;
 using enum unit_symbol_separator;
@@ -178,6 +176,7 @@ static_assert(unit_symbol(pow<123>(metre)) == "m¹²³");
 static_assert(unit_symbol(pow<1, 2>(metre)) == "m^(1/2)");
 static_assert(unit_symbol(pow<3, 5>(metre)) == "m^(3/5)");
 static_assert(unit_symbol(pow<1, 2>(metre / second)) == "m^(1/2)/s^(1/2)");
+static_assert(unit_symbol<unit_symbol_formatting{.solidus = never}>(pow<1, 2>(metre / second)) == "m^(1/2) s^-(1/2)");
 
 // dimensionless unit
 static_assert(unit_symbol(radian) == "rad");
@@ -188,6 +187,4 @@ static_assert(unit_symbol(gram * standard_gravity * si2019::speed_of_light_in_va
 static_assert(unit_symbol(gram / standard_gravity) == "g/g₀");
 static_assert(unit_symbol(kilo<metre> / second / mega<iau::parsec>) == "km Mpc⁻¹ s⁻¹");
 
-#endif  // __cpp_lib_constexpr_string
-
 }  // namespace