#1922: Refactor PrimitiveExpression to store the literal format in the AST

ICSharpCode.Decompiler/CSharp/OutputVisitor/CSharpOutputVisitor.cs

@@ -992,7 +992,7 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 		public virtual void VisitPrimitiveExpression(PrimitiveExpression primitiveExpression)
 		{
 			StartNode(primitiveExpression);
-			writer.WritePrimitiveValue(primitiveExpression.Value, primitiveExpression.UnsafeLiteralValue);
+			writer.WritePrimitiveValue(primitiveExpression.Value, primitiveExpression.Format);
 			isAfterSpace = false;
 			EndNode(primitiveExpression);
 		}
@@ -1019,7 +1019,7 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			interpolation.Expression.AcceptVisitor(this);
 			if (interpolation.Suffix != null) {
 				writer.WriteToken(Roles.Colon, ":");
-				writer.WritePrimitiveValue("", interpolation.Suffix);
+				writer.WriteInterpolatedText(interpolation.Suffix);
 			}
 			writer.WriteToken(Interpolation.RBrace, "}");
 
@@ -1029,7 +1029,7 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 		public virtual void VisitInterpolatedStringText(InterpolatedStringText interpolatedStringText)
 		{
 			StartNode(interpolatedStringText);
-			writer.WritePrimitiveValue("", TextWriterTokenWriter.ConvertString(interpolatedStringText.Text));
+			writer.WriteInterpolatedText(interpolatedStringText.Text);
 			EndNode(interpolatedStringText);
 		}
 		#endregion

ICSharpCode.Decompiler/CSharp/OutputVisitor/ITokenWriter.cs

@@ -45,10 +45,15 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 		/// <summary>
 		/// Writes a primitive/literal value
 		/// </summary>
-		public abstract void WritePrimitiveValue(object value, string literalValue = null);
+		public abstract void WritePrimitiveValue(object value, LiteralFormat format = LiteralFormat.None);
 
 		public abstract void WritePrimitiveType(string type);
 
+		/// <summary>
+		/// Write a piece of text in an interpolated string literal.
+		/// </summary>
+		public abstract void WriteInterpolatedText(string text);
+
 		public abstract void Space();
 		public abstract void Indent();
 		public abstract void Unindent();
@@ -123,9 +128,9 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			decoratedWriter.WriteToken(role, token);
 		}
 
-		public override void WritePrimitiveValue(object value, string literalValue = null)
+		public override void WritePrimitiveValue(object value, LiteralFormat format = LiteralFormat.None)
 		{
-			decoratedWriter.WritePrimitiveValue(value, literalValue);
+			decoratedWriter.WritePrimitiveValue(value, format);
 		}
 
 		public override void WritePrimitiveType(string type)
@@ -133,6 +138,11 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			decoratedWriter.WritePrimitiveType(type);
 		}
 
+		public override void WriteInterpolatedText(string text)
+		{
+			decoratedWriter.WriteInterpolatedText(text);
+		}
+
 		public override void Space()
 		{
 			decoratedWriter.Space();

ICSharpCode.Decompiler/CSharp/OutputVisitor/InsertMissingTokensDecorator.cs

@@ -116,11 +116,11 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			base.WriteIdentifier(identifier);
 		}
 		
-		public override void WritePrimitiveValue(object value, string literalValue = null)
+		public override void WritePrimitiveValue(object value, LiteralFormat format = LiteralFormat.None)
 		{
 			Expression node = nodes.Peek().LastOrDefault() as Expression;
 			var startLocation = locationProvider.Location;
-			base.WritePrimitiveValue(value, literalValue);
+			base.WritePrimitiveValue(value, format);
 			if (node is PrimitiveExpression) {
 				((PrimitiveExpression)node).SetLocation(startLocation, locationProvider.Location);
 			}
@@ -128,7 +128,7 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 				((NullReferenceExpression)node).SetStartLocation(startLocation);
 			}
 		}
-		
+
 		public override void WritePrimitiveType(string type)
 		{
 			PrimitiveType node = nodes.Peek().LastOrDefault() as PrimitiveType;

ICSharpCode.Decompiler/CSharp/OutputVisitor/InsertRequiredSpacesDecorator.cs

@@ -129,12 +129,12 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			lastWritten = LastWritten.Whitespace;
 		}
 		
-		public override void WritePrimitiveValue(object value, string literalValue = null)
+		public override void WritePrimitiveValue(object value, LiteralFormat format = LiteralFormat.None)
 		{
 			if (lastWritten == LastWritten.KeywordOrIdentifier) {
 				Space();
 			}
-			base.WritePrimitiveValue(value, literalValue);
+			base.WritePrimitiveValue(value, format);
 			if (value == null || value is bool)
 				return;
 			if (value is string) {

ICSharpCode.Decompiler/CSharp/OutputVisitor/TextWriterTokenWriter.cs

@@ -224,16 +224,9 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			tokenWriter.WritePrimitiveValue(value);
 			return writer.ToString();
 		}
-
-		public override void WritePrimitiveValue(object value, string literalValue = null)
+		
+		public override void WritePrimitiveValue(object value, LiteralFormat format = LiteralFormat.None)
 		{
-			if (literalValue != null) {
-				textWriter.Write(literalValue);
-				column += literalValue.Length;
-				Length += literalValue.Length;
-				return;
-			}
-
 			if (value == null) {
 				// usually NullReferenceExpression should be used for this, but we'll handle it anyways
 				textWriter.Write("null");
@@ -346,12 +339,12 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 				Length += number.Length;
 			} else if (value is IFormattable) {
 				StringBuilder b = new StringBuilder();
-				//				if (primitiveExpression.LiteralFormat == LiteralFormat.HexadecimalNumber) {
-				//					b.Append("0x");
-				//					b.Append(((IFormattable)val).ToString("x", NumberFormatInfo.InvariantInfo));
-				//				} else {
-				b.Append(((IFormattable)value).ToString(null, NumberFormatInfo.InvariantInfo));
-				//				}
+				if (format == LiteralFormat.HexadecimalNumber) {
+					b.Append("0x");
+					b.Append(((IFormattable)value).ToString("X", NumberFormatInfo.InvariantInfo));
+				} else {
+					b.Append(((IFormattable)value).ToString(null, NumberFormatInfo.InvariantInfo));
+				}
 				if (value is uint || value is ulong) {
 					b.Append("u");
 				}
@@ -369,6 +362,11 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 			}
 		}
 
+		public override void WriteInterpolatedText(string text)
+		{
+			textWriter.Write(ConvertString(text));
+		}
+
 		/// <summary>
 		/// Gets the escape sequence for the specified character within a char literal.
 		/// Does not include the single quotes surrounding the char literal.

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

@@ -29,6 +29,20 @@ using ICSharpCode.Decompiler.Util;
 
 namespace ICSharpCode.Decompiler.CSharp.Syntax
 {
+	/// <summary>
+	/// Form of a C# literal.
+	/// </summary>
+	public enum LiteralFormat : byte
+	{
+		None,
+		DecimalNumber,
+		HexadecimalNumber,
+		BinaryNumber,
+		StringLiteral,
+		VerbatimStringLiteral,
+		CharLiteral,
+	}
+
 	/// <summary>
 	/// Represents a literal value.
 	/// </summary>
@@ -63,26 +77,16 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 		}
 		
 		object value;
-		
+		LiteralFormat format;
+
 		public object Value {
 			get { return this.value; }
 			set {
 				ThrowIfFrozen();
 				this.value = value;
-				literalValue = null;
 			}
 		}
 		
-		/// <remarks>Never returns null.</remarks>
-		public string LiteralValue {
-			get { return literalValue ?? ""; }
-		}
-		
-		/// <remarks>Can be null.</remarks>
-		public string UnsafeLiteralValue {
-			get { return literalValue; }
-		}
-		
 		public void SetValue(object value, string literalValue)
 		{
 			if (value == null)
@@ -91,24 +95,24 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			this.value = value;
 			this.literalValue = literalValue;
 		}
-		
-		public PrimitiveExpression (object value)
-		{
-			this.Value = value;
-			this.literalValue = null;
+
+		public LiteralFormat Format {
+			get {  return format;}
+			set {
+				ThrowIfFrozen();
+				format = value;
+			}
 		}
-		
-		public PrimitiveExpression (object value, string literalValue)
+
+		public PrimitiveExpression (object value)
 		{
 			this.Value = value;
-			this.literalValue = literalValue;
 		}
 		
-		public PrimitiveExpression (object value, TextLocation startLocation, string literalValue)
+		public PrimitiveExpression (object value, LiteralFormat format)
 		{
 			this.Value = value;
-			this.startLocation = startLocation;
-			this.literalValue = literalValue;
+			this.format = format;
 		}
 		
 		public override void AcceptVisitor (IAstVisitor visitor)

ICSharpCode.Decompiler/CSharp/Syntax/TypeSystemAstBuilder.cs

@@ -784,17 +784,11 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 					constantValue = CSharpPrimitiveCast.Cast(TypeCode.Int32, constantValue, false);
 					literalType = type.GetDefinition().Compilation.FindType(KnownTypeCode.Int32);
 				}
-				string literalValue = null;
+				LiteralFormat format = LiteralFormat.None;
 				if (PrintIntegralValuesAsHex) {
-					literalValue = $"0x{constantValue:X}";
-					if (constantValue is uint || constantValue is ulong) {
-						literalValue += "u";
-					}
-					if (constantValue is long || constantValue is ulong) {
-						literalValue += "L";
-					}
+					format = LiteralFormat.HexadecimalNumber;
 				}
-				expr = new PrimitiveExpression(constantValue, literalValue);
+				expr = new PrimitiveExpression(constantValue, format);
 				if (AddResolveResultAnnotations)
 					expr.AddAnnotation(new ConstantResolveResult(literalType, constantValue));
 				if (smallInteger && !type.Equals(expectedType)) {

ICSharpCode.Decompiler/Output/TextTokenWriter.cs

@@ -322,11 +322,16 @@ namespace ICSharpCode.Decompiler
 			output.WriteLine();
 		}
 		
-		public override void WritePrimitiveValue(object value, string literalValue = null)
+		public override void WritePrimitiveValue(object value, LiteralFormat format = LiteralFormat.None)
 		{
-			new TextWriterTokenWriter(new TextOutputWriter(output)).WritePrimitiveValue(value, literalValue);
+			new TextWriterTokenWriter(new TextOutputWriter(output)).WritePrimitiveValue(value, format);
 		}
-		
+
+		public override void WriteInterpolatedText(string text)
+		{
+			output.Write(TextWriterTokenWriter.ConvertString(text));
+		}
+
 		public override void WritePrimitiveType(string type)
 		{
 			switch (type) {

ILSpy/Languages/CSharpHighlightingTokenWriter.cs

@@ -392,7 +392,7 @@ namespace ICSharpCode.ILSpy
 			}
 		}
 
-		public override void WritePrimitiveValue(object value, string literalValue = null)
+		public override void WritePrimitiveValue(object value, Decompiler.CSharp.Syntax.LiteralFormat format)
 		{
 			HighlightingColor color = null;
 			if (value is null) {
@@ -404,7 +404,7 @@ namespace ICSharpCode.ILSpy
 			if (color != null) {
 				BeginSpan(color);
 			}
-			base.WritePrimitiveValue(value, literalValue);
+			base.WritePrimitiveValue(value, format);
 			if (color != null) {
 				EndSpan();
 			}

ILSpy/Languages/CSharpLexer.cs

@@ -9,7 +9,7 @@ using System.Text;
 
 namespace ICSharpCode.ILSpy
 {
-	public class LATextReader : TextReader
+	class LATextReader : TextReader
 	{
 		List<int> buffer;
 		TextReader reader;
@@ -52,7 +52,7 @@ namespace ICSharpCode.ILSpy
 		}
 	}
 
-	public enum LiteralFormat : byte
+	enum LiteralFormat : byte
 	{
 		None,
 		DecimalNumber,
@@ -64,7 +64,7 @@ namespace ICSharpCode.ILSpy
 		DateTimeLiteral
 	}
 
-	public class Literal
+	class Literal
 	{
 		internal readonly LiteralFormat literalFormat;
 		internal readonly object literalValue;