Wrote binding expression parser by hand.

Sprache couldn't cope with it as it requires a left-recursive grammar.

src/Markup/Perspex.Markup/Binding/ExpressionNode.cs

@@ -14,12 +14,7 @@ namespace Perspex.Markup.Binding
 
         private ExpressionValue _value = ExpressionValue.None;
 
-        public ExpressionNode(ExpressionNode next)
-        {
-            Next = next;
-        }
-
-        public ExpressionNode Next { get; }
+        public ExpressionNode Next { get; set; }
 
         public object Target
         {

src/Markup/Perspex.Markup/Binding/ExpressionNodeBuilder.cs

@@ -2,12 +2,11 @@
 // Licensed under the MIT license. See licence.md file in the project root for full license information.
 
 using System;
-using System.Collections.Generic;
-using Perspex.Markup.Parsers.CSharp;
+using Perspex.Markup.Binding.Parsers;
 
 namespace Perspex.Markup.Binding
 {
-    internal class ExpressionNodeBuilder
+    internal static class ExpressionNodeBuilder
     {
         public static ExpressionNode Build(string expression)
         {
@@ -16,85 +15,15 @@ namespace Perspex.Markup.Binding
                 throw new ArgumentException("'expression' may not be empty.");
             }
 
-            var syntax = CSharpSyntaxTree.ParseExpression(expression);
+            var reader = new Reader(expression);
+            var node = ExpressionParser.Parse(reader);
 
-            if (syntax != null)
+            if (!reader.End)
             {
-                return Build(expression, syntax, null);
+                throw new ExpressionParseException(reader, "Expected end of expression.");
             }
-            else
-            {
-                throw new Exception($"Invalid expression: {expression}");
-            }
-        }
-
-        private static ExpressionNode Build(string expression, SyntaxNode syntax, ExpressionNode next)
-        {
-            var expressionStatement = syntax as ExpressionStatementSyntax;
-            var identifier = syntax as IdentifierSyntax;
-            var memberAccess = syntax as MemberAccessExpressionSyntax;
-            var unaryExpression = syntax as PrefixUnaryExpressionSyntax;
-            var elementAccess = syntax as ElementAccessExpressionSyntax;
 
-            if (expressionStatement != null)
-            {
-                return Build(expression, expressionStatement.Expression, next);
-            }
-            else if (identifier != null)
-            {
-                next = new PropertyAccessorNode(next, identifier.Name);
-            }
-            else if (memberAccess != null)
-            {
-                next = Build(expression, memberAccess.Expression, next);
-                next = new PropertyAccessorNode(next, memberAccess.Member.Name);
-            }
-            else if (unaryExpression != null && unaryExpression.Kind() == SyntaxKind.LogicalNotExpression)
-            {
-                next = Build(expression, unaryExpression.Operand, next);
-                next = new LogicalNotNode(next);
-            }
-            else if (elementAccess != null)
-            {
-                next = Build(expression, elementAccess, next);
-                next = Build(expression, elementAccess.Expression, next);
-            }
-            else
-            {
-                throw new Exception($"Invalid expression: {expression}");
-            }
-
-            return next;
-        }
-
-        private static ExpressionNode Build(string expression, ElementAccessExpressionSyntax syntax, ExpressionNode next)
-        {
-            var argList = syntax.ArgumentList as BracketedArgumentListSyntax;
-
-            if (argList != null)
-            {
-                var args = new List<object>();
-
-                foreach (var arg in argList.Arguments)
-                {
-                    var literal = arg as LiteralExpressionSyntax;
-
-                    if (literal != null)
-                    {
-                        args.Add(literal.Value);
-                    }
-                    else
-                    {
-                        throw new Exception($"Invalid expression: {expression}");
-                    }
-                }
-
-                return new ElementAccessorNode(next, args);
-            }
-            else
-            {
-                throw new Exception($"Invalid expression: {expression}");
-            }
+            return node;
         }
     }
 }

src/Markup/Perspex.Markup/Binding/ExpressionParseException.cs

@@ -0,0 +1,24 @@
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System;
+using Perspex.Markup.Binding.Parsers;
+
+namespace Perspex.Markup.Binding
+{
+    public class ExpressionParseException : Exception
+    {
+        internal ExpressionParseException(int column, string message)
+            : base(message)
+        {
+            Column = column;
+        }
+
+        internal ExpressionParseException(Reader r, string message)
+            : this(r.Position, message)
+        {
+        }
+
+        public int Column { get; }
+    }
+}

src/Markup/Perspex.Markup/Binding/ElementAccessorNode.cs → src/Markup/Perspex.Markup/Binding/IndexerNode.cs

@@ -10,12 +10,11 @@ using System.Reflection;
 
 namespace Perspex.Markup.Binding
 {
-    internal class ElementAccessorNode : ExpressionNode
+    internal class IndexerNode : ExpressionNode
     {
         private int[] _intArgs;
 
-        public ElementAccessorNode(ExpressionNode next, IList<object> arguments)
-            : base(next)
+        public IndexerNode(IList<object> arguments)
         {
             Arguments = arguments;
 

src/Markup/Perspex.Markup/Binding/LogicalNotNode.cs

@@ -9,11 +9,6 @@ namespace Perspex.Markup.Binding
 {
     internal class LogicalNotNode : ExpressionNode
     {
-        public LogicalNotNode(ExpressionNode next)
-            : base(next)
-        {
-        }
-
         public override bool SetValue(object value)
         {
             throw new NotSupportedException("Cannot set a negated binding.");

src/Markup/Perspex.Markup/Binding/Parsers/ArgumentListParser.cs

@@ -0,0 +1,63 @@
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System;
+using System.Collections.Generic;
+
+namespace Perspex.Markup.Binding.Parsers
+{
+    internal static class ArgumentListParser
+    {
+        public static IList<object> Parse(Reader r, char open, char close)
+        {
+            if (r.Peek == open)
+            {
+                var result = new List<object>();
+
+                r.Take();
+
+                while (!r.End && r.Peek != close)
+                {
+                    var literal = LiteralParser.Parse(r);
+
+                    if (literal != null)
+                    {
+                        result.Add(literal);
+                    }
+                    else
+                    {
+                        throw new ExpressionParseException(r, "Expected integer.");
+                    }
+
+                    r.SkipWhitespace();
+
+                    if (r.End)
+                    {
+                        throw new ExpressionParseException(r, "Expected ','.");
+                    }
+                    if (r.Peek != close)
+                    {
+                        if (r.Take() != ',')
+                        {
+                            throw new ExpressionParseException(r, "Expected ','.");
+                        }
+
+                        r.SkipWhitespace();
+                    }
+                }
+
+                if (!r.End)
+                {
+                    r.Take();
+                    return result;
+                }
+                else
+                {
+                    throw new ExpressionParseException(r, "Expected ']'.");
+                }
+            }
+
+            return null;
+        }
+    }
+}

src/Markup/Perspex.Markup/Binding/Parsers/ExpressionParser.cs

@@ -0,0 +1,152 @@
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System;
+using System.Collections.Generic;
+
+namespace Perspex.Markup.Binding.Parsers
+{
+    internal static class ExpressionParser
+    {
+        public static ExpressionNode Parse(Reader r)
+        {
+            var nodes = new List<ExpressionNode>();
+            var state = State.Start;
+
+            while (!r.End && state != State.End)
+            {
+                switch (state)
+                {
+                    case State.Start:
+                        state = ParseStart(r, nodes);
+                        break;
+
+                    case State.AfterMember:
+                        state = ParseAfterMember(r, nodes);
+                        break;
+
+                    case State.BeforeMember:
+                        state = ParseBeforeMember(r, nodes);
+                        break;
+
+                    default:
+                        state = State.End;
+                        break;
+                }
+            }
+
+            for (int n = 0; n < nodes.Count - 1; ++n)
+            {
+                nodes[n].Next = nodes[n + 1];
+            }
+
+            return nodes[0];
+        }
+
+        private static State ParseStart(Reader r, IList<ExpressionNode> nodes)
+        {
+            if (ParseNot(r))
+            {
+                nodes.Add(new LogicalNotNode());
+                return State.Start;
+            }
+            else
+            {
+                var identifier = IdentifierParser.Parse(r);
+
+                if (identifier != null)
+                {
+                    nodes.Add(new PropertyAccessorNode(identifier));
+                    return State.AfterMember;
+                }
+            }
+
+            return State.End;
+        }
+
+        private static State ParseAfterMember(Reader r, IList<ExpressionNode> nodes)
+        {
+            if (ParseMemberAccessor(r))
+            {
+                return State.BeforeMember;
+            }
+            else
+            {
+                var args = ArgumentListParser.Parse(r, '[', ']');
+
+                if (args != null)
+                {
+                    if (args.Count == 0)
+                    {
+                        throw new ExpressionParseException(r, "Indexer may not be empty.");
+                    }
+
+                    nodes.Add(new IndexerNode(args));
+                    return State.AfterMember;
+                }
+            }
+
+            return State.End;
+        }
+
+        private static State ParseBeforeMember(Reader r, IList<ExpressionNode> nodes)
+        {
+            var identifier = IdentifierParser.Parse(r);
+
+            if (identifier != null)
+            {
+                nodes.Add(new PropertyAccessorNode(identifier));
+                return State.AfterMember;
+            }
+
+            return State.End;
+        }
+
+        private static bool ParseNot(Reader r)
+        {
+            if (!r.End && r.Peek == '!')
+            {
+                r.Take();
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        private static bool ParseMemberAccessor(Reader r)
+        {
+            if (!r.End && r.Peek == '.')
+            {
+                r.Take();
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        private static bool ParseIndexer(Reader r)
+        {
+            if (!r.End && r.Peek == '[')
+            {
+                r.Take();
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        private enum State
+        {
+            Start,
+            AfterMember,
+            BeforeMember,
+            End,
+        }
+    }
+}

src/Markup/Perspex.Markup/Binding/Parsers/IdentifierParser.cs

@@ -0,0 +1,51 @@
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System.Globalization;
+using System.Text;
+
+namespace Perspex.Markup.Binding.Parsers
+{
+    internal static class IdentifierParser
+    {
+        public static string Parse(Reader r)
+        {
+            if (IsValidIdentifierStart(r.Peek))
+            {
+                var result = new StringBuilder();
+
+                while (!r.End && IsValidIdentifierChar(r.Peek))
+                {
+                    result.Append(r.Take());
+                }
+
+                return result.ToString();
+            }
+            else
+            {
+                return null;
+            }
+        }
+
+        private static bool IsValidIdentifierStart(char c)
+        {
+            return char.IsLetter(c) || c == '_';
+        }
+
+        private static bool IsValidIdentifierChar(char c)
+        {
+            if (IsValidIdentifierStart(c))
+            {
+                return true;
+            }
+            else
+            {
+                var cat = CharUnicodeInfo.GetUnicodeCategory(c);
+                return cat == UnicodeCategory.NonSpacingMark ||
+                       cat == UnicodeCategory.SpacingCombiningMark ||
+                       cat == UnicodeCategory.ConnectorPunctuation ||
+                       cat == UnicodeCategory.Format;
+            }
+        }
+    }
+}

src/Markup/Perspex.Markup/Binding/Parsers/LiteralParser.cs

@@ -0,0 +1,34 @@
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System.Text;
+
+namespace Perspex.Markup.Binding.Parsers
+{
+    internal static class LiteralParser
+    {
+        public static object Parse(Reader r)
+        {
+            if (char.IsDigit(r.Peek))
+            {
+                StringBuilder result = new StringBuilder();
+
+                while (!r.End)
+                {
+                    if (char.IsDigit(r.Peek))
+                    {
+                        result.Append(r.Take());
+                    }
+                    else
+                    {
+                        break;
+                    }
+                }
+
+                return int.Parse(result.ToString());
+            }
+
+            return null;
+        }
+    }
+}

src/Markup/Perspex.Markup/Binding/Parsers/Reader.cs

@@ -0,0 +1,31 @@
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System;
+
+namespace Perspex.Markup.Binding.Parsers
+{
+    internal class Reader
+    {
+        private string _s;
+        private int _i;
+
+        public Reader(string s)
+        {
+            _s = s;
+        }
+
+        public bool End => _i == _s.Length;
+        public char Peek => _s[_i];
+        public int Position => _i;
+        public char Take() => _s[_i++];
+
+        public void SkipWhitespace()
+        {
+            while (!End && char.IsWhiteSpace(Peek))
+            {
+                Take();
+            }
+        }
+    }
+}

src/Markup/Perspex.Markup/Binding/PropertyAccessorNode.cs

@@ -11,8 +11,7 @@ namespace Perspex.Markup.Binding
     {
         private PropertyInfo _propertyInfo;
 
-        public PropertyAccessorNode(ExpressionNode next, string propertyName)
-            : base(next)
+        public PropertyAccessorNode(string propertyName)
         {
             PropertyName = propertyName;
         }

src/Markup/Perspex.Markup/Parsers/CSharp/BracketedArgumentListSyntax.cs

@@ -1,18 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-using System.Collections.Generic;
-using System.Linq;
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class BracketedArgumentListSyntax
-    {
-        public BracketedArgumentListSyntax(IEnumerable<ExpressionSyntax> arguments)
-        {
-            Arguments = arguments.ToList();
-        }
-
-        public IList<ExpressionSyntax> Arguments { get; }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/CSharpSyntaxTree.cs

@@ -1,17 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-using System;
-using Perspex.Markup.Parsers.CSharp.Grammar;
-using Sprache;
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    public class CSharpSyntaxTree
-    {
-        internal static ExpressionStatementSyntax ParseExpression(string expression)
-        {
-            return ExpressionGrammar.ExpressionStatement().Parse(expression);
-        }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/ElementAccessExpressionSyntax.cs

@@ -1,19 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class ElementAccessExpressionSyntax : ExpressionSyntax
-    {
-        public ElementAccessExpressionSyntax(
-            ExpressionSyntax expression, 
-            BracketedArgumentListSyntax argumentList)
-        {
-            Expression = expression;
-            ArgumentList = argumentList;
-        }
-
-        public ExpressionSyntax Expression { get; }
-        public BracketedArgumentListSyntax ArgumentList { get; }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/ExpressionStatementSyntax.cs

@@ -1,15 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class ExpressionStatementSyntax : SyntaxNode
-    {
-        public ExpressionStatementSyntax(ExpressionSyntax expression)
-        {
-            Expression = expression;
-        }
-
-        public ExpressionSyntax Expression { get; }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/ExpressionSyntax.cs

@@ -1,9 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class ExpressionSyntax : SyntaxNode
-    {
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/Grammar/ExpressionGrammar.cs

@@ -1,64 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-using System.Collections.Generic;
-using System.Linq;
-using Sprache;
-
-namespace Perspex.Markup.Parsers.CSharp.Grammar
-{
-    internal class ExpressionGrammar
-    {
-        public static Parser<ExpressionStatementSyntax> ExpressionStatement()
-        {
-            return from expression in Expression().End()
-                   select new ExpressionStatementSyntax(expression);
-        }
-
-        public static Parser<ExpressionSyntax> Expression()
-        {
-            return LiteralGrammar.Literal()
-                .Or<ExpressionSyntax>(PrefixUnary())
-                .Or<ExpressionSyntax>(MemberAccess())
-                .Or<ExpressionSyntax>(ElementAccess())
-                .Or<ExpressionSyntax>(IdentifierGrammar.Identifier());
-        }
-
-        public static Parser<MemberAccessExpressionSyntax> MemberAccess()
-        {
-            return from identifier in IdentifierGrammar.Identifier()
-                   from dot in Parse.Char('.')
-                   from expression in Expression()
-                   select new MemberAccessExpressionSyntax(expression, identifier);
-        }
-
-        public static Parser<ElementAccessExpressionSyntax> ElementAccess()
-        {
-            return from expression in IdentifierGrammar.Identifier()
-                   from arguments in BracketedArgumentList('[', ']')
-                   select new ElementAccessExpressionSyntax(expression, arguments);
-        }
-
-        public static Parser<BracketedArgumentListSyntax> BracketedArgumentList(
-            char openBracket, 
-            char closeBracket)
-        {
-            return from open in Parse.Char(openBracket)
-                   from arguments in Arguments()
-                   from close in Parse.Char(closeBracket)
-                   select new BracketedArgumentListSyntax(arguments);
-        }
-
-        public static Parser<IEnumerable<ExpressionSyntax>> Arguments()
-        {
-            return Expression().DelimitedBy(Parse.Char(',').Token());
-        }
-
-        public static Parser<PrefixUnaryExpressionSyntax> PrefixUnary()
-        {
-            return from bang in Parse.Char('!')
-                   from operand in Expression()
-                   select new PrefixUnaryExpressionSyntax(operand, SyntaxKind.LogicalNotExpression);
-        }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/Grammar/IdentifierGrammar.cs

@@ -1,41 +0,0 @@
-using System.Globalization;
-using System.Linq;
-using Sprache;
-
-namespace Perspex.Markup.Parsers.CSharp.Grammar
-{
-    internal class IdentifierGrammar
-    {
-        private static readonly Parser<char> CombiningCharacter = Parse.Char(
-            c =>
-            {
-                var cat = CharUnicodeInfo.GetUnicodeCategory(c);
-                return cat == UnicodeCategory.NonSpacingMark ||
-                       cat == UnicodeCategory.SpacingCombiningMark;
-            },
-            "Connecting Character");
-
-        private static readonly Parser<char> ConnectingCharacter = Parse.Char(
-            c => CharUnicodeInfo.GetUnicodeCategory(c) == UnicodeCategory.ConnectorPunctuation,
-            "Connecting Character");
-
-        private static readonly Parser<char> FormattingCharacter = Parse.Char(
-            c => CharUnicodeInfo.GetUnicodeCategory(c) == UnicodeCategory.Format,
-            "Connecting Character");
-
-        private static readonly Parser<char> IdentifierStart = Parse.Letter.Or(Parse.Char('_'));
-
-        private static readonly Parser<char> IdentifierChar = Parse
-            .LetterOrDigit
-            .Or(ConnectingCharacter)
-            .Or(CombiningCharacter)
-            .Or(FormattingCharacter);
-
-        public static Parser<IdentifierSyntax> Identifier()
-        {
-            return from start in IdentifierStart.Once().Text()
-                   from @char in IdentifierChar.Many().Text()
-                   select new IdentifierSyntax(start + @char);
-        }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/Grammar/LiteralGrammar.cs

@@ -1,20 +0,0 @@
-using System.Globalization;
-using System.Linq;
-using Sprache;
-
-namespace Perspex.Markup.Parsers.CSharp.Grammar
-{
-    internal class LiteralGrammar
-    {
-        public static Parser<LiteralExpressionSyntax> Literal()
-        {
-            return Integer();
-        }
-
-        public static Parser<LiteralExpressionSyntax> Integer()
-        {
-            return from number in Parse.Number
-                   select new LiteralExpressionSyntax(int.Parse(number), number);
-        }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/IdentifierSyntax.cs

@@ -1,17 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-using System;
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class IdentifierSyntax : ExpressionSyntax
-    {
-        public IdentifierSyntax(string name)
-        {
-            Name = name;
-        }
-
-        public String Name { get; }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/LiteralExpressionSyntax.cs

@@ -1,17 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class LiteralExpressionSyntax : ExpressionSyntax
-    {
-        public LiteralExpressionSyntax(object value, string valueText)
-        {
-            Value = value;
-            ValueText = valueText;
-        }
-
-        public object Value { get; }
-        public string ValueText { get; }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/MemberAccessExpressionSyntax.cs

@@ -1,17 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class MemberAccessExpressionSyntax : ExpressionSyntax
-    {
-        public MemberAccessExpressionSyntax(ExpressionSyntax expression, IdentifierSyntax member)
-        {
-            Expression = expression;
-            Member = member;
-        }
-
-        public ExpressionSyntax Expression { get; }
-        public IdentifierSyntax Member { get; }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/PrefixUnaryExpressionSyntax.cs

@@ -1,23 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class PrefixUnaryExpressionSyntax : ExpressionSyntax
-    {
-        private SyntaxKind _kind;
-
-        public PrefixUnaryExpressionSyntax(ExpressionSyntax operand, SyntaxKind kind)
-        {
-            Operand = operand;
-            _kind = kind;
-        }
-
-        public ExpressionSyntax Operand { get; }
-
-        public SyntaxKind Kind()
-        {
-            return _kind;
-        }
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/SyntaxKind.cs

@@ -1,10 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal enum SyntaxKind
-    {
-        LogicalNotExpression,
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/SyntaxNode.cs

@@ -1,9 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class SyntaxNode
-    {
-    }
-}

src/Markup/Perspex.Markup/Parsers/CSharp/SyntaxToken.cs

@@ -1,15 +0,0 @@
-// Copyright (c) The Perspex Project. All rights reserved.
-// Licensed under the MIT license. See licence.md file in the project root for full license information.
-
-namespace Perspex.Markup.Parsers.CSharp
-{
-    internal class SyntaxToken
-    {
-        public SyntaxToken(string valueText)
-        {
-            ValueText = valueText;
-        }
-
-        public string ValueText { get; }
-    }
-}

src/Markup/Perspex.Markup/Perspex.Markup.csproj

@@ -35,34 +35,21 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Binding\ExpressionNodeBuilder.cs" />
+    <Compile Include="Binding\ExpressionParseException.cs" />
     <Compile Include="Binding\ExpressionValue.cs" />
     <Compile Include="Binding\LogicalNotNode.cs" />
-    <Compile Include="Binding\ElementAccessorNode.cs" />
+    <Compile Include="Binding\IndexerNode.cs" />
+    <Compile Include="Binding\Parsers\ArgumentListParser.cs" />
+    <Compile Include="Binding\Parsers\LiteralParser.cs" />
+    <Compile Include="Binding\Parsers\IdentifierParser.cs" />
+    <Compile Include="Binding\Parsers\ExpressionParser.cs" />
+    <Compile Include="Binding\Parsers\Reader.cs" />
     <Compile Include="Binding\PropertyAccessorNode.cs" />
     <Compile Include="Binding\ExpressionNode.cs" />
     <Compile Include="Binding\ExpressionObserver.cs" />
-    <Compile Include="Parsers\CSharp\BracketedArgumentListSyntax.cs" />
-    <Compile Include="Parsers\CSharp\CSharpSyntaxTree.cs" />
-    <Compile Include="Parsers\CSharp\ElementAccessExpressionSyntax.cs" />
-    <Compile Include="Parsers\CSharp\ExpressionSyntax.cs" />
-    <Compile Include="Parsers\CSharp\ExpressionStatementSyntax.cs" />
-    <Compile Include="Parsers\CSharp\Grammar\ExpressionGrammar.cs" />
-    <Compile Include="Parsers\CSharp\Grammar\IdentifierGrammar.cs" />
-    <Compile Include="Parsers\CSharp\Grammar\LiteralGrammar.cs" />
-    <Compile Include="Parsers\CSharp\IdentifierSyntax.cs" />
-    <Compile Include="Parsers\CSharp\LiteralExpressionSyntax.cs" />
-    <Compile Include="Parsers\CSharp\MemberAccessExpressionSyntax.cs" />
-    <Compile Include="Parsers\CSharp\PrefixUnaryExpressionSyntax.cs" />
-    <Compile Include="Parsers\CSharp\SyntaxKind.cs" />
-    <Compile Include="Parsers\CSharp\SyntaxToken.cs" />
-    <Compile Include="Parsers\CSharp\SyntaxNode.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="Sprache, Version=2.0.0.47, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\..\..\packages\Sprache.2.0.0.47\lib\portable-net4+netcore45+win8+wp8+sl5+MonoAndroid1+MonoTouch1\Sprache.dll</HintPath>
-      <Private>True</Private>
-    </Reference>
     <Reference Include="System.Reactive.Core, Version=2.2.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\..\..\packages\Rx-Core.2.2.5\lib\portable-windows8+net45+wp8\System.Reactive.Core.dll</HintPath>
       <Private>True</Private>

src/Markup/Perspex.Markup/packages.config

@@ -5,5 +5,4 @@
   <package id="Rx-Linq" version="2.2.5" targetFramework="portable45-net45+win8" />
   <package id="Rx-Main" version="2.2.5" targetFramework="portable45-net45+win8" />
   <package id="Rx-PlatformServices" version="2.2.5" targetFramework="portable45-net45+win8" />
-  <package id="Sprache" version="2.0.0.47" targetFramework="portable45-net45+win8" />
 </packages>

tests/Perspex.Markup.UnitTests/Binding/ExpressionNodeBuilderTests.cs

@@ -63,6 +63,7 @@ namespace Perspex.Markup.UnitTests.Binding
             Assert.Equal(2, result.Count);
             AssertIsProperty(result[0], "Foo");
             AssertIsIndexer(result[1], 15);
+            Assert.IsType<IndexerNode>(result[1]);
         }
 
         [Fact]
@@ -90,7 +91,7 @@ namespace Perspex.Markup.UnitTests.Binding
         {
             var result = ToList(ExpressionNodeBuilder.Build("Foo[15][16]"));
 
-            Assert.Equal(2, result.Count);
+            Assert.Equal(3, result.Count);
             AssertIsProperty(result[0], "Foo");
             AssertIsIndexer(result[1], 15);
             AssertIsIndexer(result[2], 16);
@@ -118,9 +119,9 @@ namespace Perspex.Markup.UnitTests.Binding
 
         private void AssertIsIndexer(ExpressionNode node, params object[] args)
         {
-            Assert.IsType<ElementAccessorNode>(node);
+            Assert.IsType<IndexerNode>(node);
 
-            var e = (ElementAccessorNode)node;
+            var e = (IndexerNode)node;
             Assert.Equal(e.Arguments.ToArray(), args.ToArray());
         }