Working on better error reporting in Plato code viewer, and Unity mesh updates.

Author: cdiggins

Parakeet/ILocation.cs

@@ -1,4 +1,6 @@
-namespace Ara3D.Parakeet
+using Ara3D.Utils;
+
+namespace Ara3D.Parakeet
 {
     /// <summary>
     /// An abstract notion of location.
@@ -13,4 +15,13 @@ public class Location : ILocation
     {
         public ParserRange GetRange() => null;
     }
+
+    public static class LocationExtensions
+    {
+        public static FileAndRange ToFileAndRange(this ILocation location)
+            => location.GetRange().ToFileAndRange();
+
+        public static FileAndRange ToFileAndRange(this ParserRange range)
+            => new FileAndRange(range.FilePath, range.BeginPosition, range.EndPosition);
+    }
 }

Parakeet/ParserRange.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.CompilerServices;
+using Ara3D.Utils;
 
 namespace Ara3D.Parakeet
 {
@@ -47,5 +47,11 @@ public override string ToString()
 
         public static ParserRange Create(ParserState begin, ParserState end)
             => new ParserRange(begin, end);
+
+        public ParserInput Input 
+            => End.Input;
+
+        public FilePath FilePath
+            => Input?.File;
     }
 }