C#: Implemented Observer.ToString().

Author: cosinekitty

Diff for: generate/dotnet/csharp_test/csharp_test.cs

@@ -4516,12 +4516,32 @@ static int StateVectorStringTest()
             return 0;
         }
 
+        static int ObserverStringCase(double latitude, double longitude, double height, string correct)
+        {
+            var observer = new Observer(latitude, longitude, height);
+            var text = observer.ToString();
+            if (text != correct)
+                return Fail($"{nameof(ObserverStringCase)}: expected [{correct}] but generated [{text}]");
+            return 0;
+        }
+
+        static int ObserverStringTest()
+        {
+            return (
+                0 == ObserverStringCase(+26.728965,  -93.157562, 1234.567, "(N 26.728965, W 093.157562, 1234.567 m)") &&
+                0 == ObserverStringCase(-26.728965,  -93.157562, 1234.567, "(S 26.728965, W 093.157562, 1234.567 m)") &&
+                0 == ObserverStringCase(+26.728965,  +93.157562, 1234.567, "(N 26.728965, E 093.157562, 1234.567 m)") &&
+                0 == ObserverStringCase(+26.728965, +171.157562,    0.0,   "(N 26.728965, E 171.157562, 0.000 m)")
+            ) ? 0 : 1;
+        }
+
         static int StringsTest()
         {
             return (
                 0 == TimeStringTest() &&
                 0 == VectorStringTest() &&
-                0 == StateVectorStringTest()
+                0 == StateVectorStringTest() &&
+                0 == ObserverStringTest()
             ) ? Pass(nameof(StringsTest)) : 1;
         }
 

Diff for: generate/template/astronomy.cs

@@ -29,6 +29,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
+using System.Text;
 using System.Text.RegularExpressions;
 
 namespace CosineKitty
@@ -1004,6 +1005,24 @@ public Observer(double latitude, double longitude, double height)
             this.longitude = longitude;
             this.height = height;
         }
+
+        /// <summary>
+        /// Converts an `Observer` to a string representation like `(N 26.728965, W 093.157562, 1234.567 m)`.
+        /// </summary>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("(");
+            sb.Append(latitude < 0.0 ? "S " : "N ");
+            sb.Append(Math.Abs(latitude).ToString("00.000000"));
+            sb.Append(", ");
+            sb.Append(longitude < 0.0 ? "W " : "E ");
+            sb.Append(Math.Abs(longitude).ToString("000.000000"));
+            sb.Append(", ");
+            sb.Append(height.ToString("0.000"));
+            sb.Append(" m)");
+            return sb.ToString();
+        }
     }
 
     /// <summary>

Diff for: source/csharp/README.md

@@ -3396,6 +3396,13 @@ from a particular place on the Earth.
 | `double` | `longitude` | Geographic longitude in degrees east (positive) or west (negative) of the prime meridian at Greenwich, England. |
 | `double` | `height` | The height above (positive) or below (negative) sea level, expressed in meters. |
 
+### member functions
+
+<a name="Observer.ToString"></a>
+### Observer.ToString() &#8658; `string`
+
+**Converts an `Observer` to a string representation like `(N 26.728965, W 093.157562, 1234.567 m)`.**
+
 ---
 
 <a name="Refraction"></a>

Diff for: source/csharp/astronomy.cs

@@ -29,6 +29,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
+using System.Text;
 using System.Text.RegularExpressions;
 
 namespace CosineKitty
@@ -1004,6 +1005,24 @@ public Observer(double latitude, double longitude, double height)
             this.longitude = longitude;
             this.height = height;
         }
+
+        /// <summary>
+        /// Converts an `Observer` to a string representation like `(N 26.728965, W 093.157562, 1234.567 m)`.
+        /// </summary>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("(");
+            sb.Append(latitude < 0.0 ? "S " : "N ");
+            sb.Append(Math.Abs(latitude).ToString("00.000000"));
+            sb.Append(", ");
+            sb.Append(longitude < 0.0 ? "W " : "E ");
+            sb.Append(Math.Abs(longitude).ToString("000.000000"));
+            sb.Append(", ");
+            sb.Append(height.ToString("0.000"));
+            sb.Append(" m)");
+            return sb.ToString();
+        }
     }
 
     /// <summary>