Deduced units symbols refactoring started

test/unit_test/runtime/digital_information_test.cpp

@@ -38,9 +38,9 @@ namespace data {
   struct kibi : units::prefix<kibi, data_prefix, units::ratio<    1'024>, "Ki"> {};
   struct mebi : units::prefix<mebi, data_prefix, units::ratio<1'048'576>, "Mi"> {};
 
-  struct bit : units::coherent_derived_unit<bit, "b", digital_information, data_prefix> {};
+  struct bit : units::named_coherent_derived_unit<bit, "b", digital_information, data_prefix> {};
   struct kilobit : units::prefixed_derived_unit<kilobit, kibi, bit> {};
-  struct byte : units::derived_unit<byte, "B", digital_information, units::ratio<8>> {};
+  struct byte : units::named_derived_unit<byte, "B", digital_information, units::ratio<8>> {};
   struct kilobyte : units::prefixed_derived_unit<kilobyte, kibi, byte> {};
 
   inline namespace literals {

test/unit_test/runtime/text_test.cpp

@@ -46,15 +46,51 @@ TEST_CASE("operator<< on a quantity", "[text][ostream]")
 
     SECTION("floating-point representation")
     {
-      stream << 72.5kJ;
-      REQUIRE(stream.str() == "72.5 kJ");
+      stream << 1023.5Pa;
+      REQUIRE(stream.str() == "1023.5 Pa");
     }
+  }
 
-    SECTION("unit with a prefix")
+  SECTION("quantity with a predefined unit + prefix")
+  {
+    SECTION("in terms of base units")
     {
       stream << 125us;
       REQUIRE(stream.str() == "125 µs");
     }
+
+    SECTION("in terms of derived units")
+    {
+      stream << 60kJ;
+      REQUIRE(stream.str() == "60 kJ");
+    }
+  }
+
+  SECTION("quantity with a deduced unit")
+  {
+    SECTION("coherent derived unit")
+    {
+      SECTION("acceleration")
+      {
+        stream << 20.m / 2s / 1s;
+        REQUIRE(stream.str() == "10 m/s²");
+      }
+
+      SECTION("volume")
+      {
+        stream << 2m * 1m * 1m;
+        REQUIRE(stream.str() == "2 m³");
+      }
+    }
+
+    SECTION("deduced derived unit")
+    {
+      SECTION("velocity")
+      {
+        stream << 20.km / 2h;
+        REQUIRE(stream.str() == "10 km/h");
+      }
+    }
   }
 
   SECTION("quantity with a predefined dimension but unknown unit")
@@ -68,7 +104,7 @@ TEST_CASE("operator<< on a quantity", "[text][ostream]")
     SECTION("unit::ratio for a dimension without a special symbol")
     {
       stream << 2.cm * 2m * 2m;
-      REQUIRE(stream.str() == "8 [1/100]m^3");
+      REQUIRE(stream.str() == "8 [1/100]m³");
     }
 
     SECTION("unit::ratio::num != 1 && unit::ratio::den == 1")
@@ -131,19 +167,19 @@ TEST_CASE("operator<< on a quantity", "[text][ostream]")
     SECTION("exp::num == 2 && exp::den == 1 for positive exponent")
     {
       stream << 4m * 2s * 2s;
-      REQUIRE(stream.str() == "16 m⋅s^2");
+      REQUIRE(stream.str() == "16 m⋅s²");
     }
 
     SECTION("exp::num == 2 && exp::den == 1 for negative exponent (first dimension)")
     {
       stream << 8.s / 2m / 2m;
-      REQUIRE(stream.str() == "2 1/m^2⋅s");
+      REQUIRE(stream.str() == "2 1/m²⋅s");
     }
 
     SECTION("exp::num == 2 && exp::den == 1 for negative exponent (not first dimension)")
     {
       stream << 8.m / 2kg / 2kg;
-      REQUIRE(stream.str() == "2 m/kg^2");
+      REQUIRE(stream.str() == "2 m/kg²");
     }
 
     SECTION("fractional positive exponent")