Fix hexadecimal format of flags enum member initializers.

ICSharpCode.Decompiler/CSharp/CSharpDecompiler.cs

@@ -1422,7 +1422,7 @@ namespace ICSharpCode.Decompiler.CSharp
 						if (enumDec.Initializer is PrimitiveExpression primitive
 							&& initValue >= 0 && (decompilationContext.CurrentTypeDefinition.HasAttribute(KnownAttribute.Flags)
 								|| (initValue > 9 && (unchecked(initValue & (initValue - 1)) == 0 || unchecked(initValue & (initValue + 1)) == 0)))) {
-							primitive.SetValue(initValue, $"0x{initValue:X}");
+							primitive.Format = LiteralFormat.HexadecimalNumber;
 						}
 					}
 					enumDec.Attributes.AddRange(field.GetAttributes().Select(a => new AttributeSection(typeSystemAstBuilder.ConvertAttribute(a))));

ICSharpCode.Decompiler/CSharp/Syntax/Expressions/PrimitiveExpression.cs

@@ -51,11 +51,9 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 		public static readonly object AnyValue = new object();
 		
 		TextLocation startLocation;
-		public override TextLocation StartLocation {
+		TextLocation endLocation;
-			get {
+		public override TextLocation StartLocation  => startLocation;
-				return startLocation;
+		public override TextLocation EndLocation  => endLocation;
-			}
-		}
 		
 		internal void SetLocation(TextLocation startLocation, TextLocation endLocation)
 		{
@@ -64,18 +62,6 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			this.endLocation = endLocation;
 		}
 		
-		string literalValue;
-		TextLocation? endLocation;
-		public override TextLocation EndLocation {
-			get {
-				if (!endLocation.HasValue) {
-					endLocation = value is string ? AdvanceLocation (StartLocation, literalValue ?? "") :
-						new TextLocation (StartLocation.Line, StartLocation.Column + (literalValue ?? "").Length);
-				}
-				return endLocation.Value;
-			}
-		}
-		
 		object value;
 		LiteralFormat format;
 
@@ -87,14 +73,6 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			}
 		}
 		
-		public void SetValue(object value, string literalValue)
-		{
-			if (value == null)
-				throw new ArgumentNullException();
-			ThrowIfFrozen();
-			this.value = value;
-			this.literalValue = literalValue;
-		}
 
 		public LiteralFormat Format {
 			get {  return format;}