private ExpressionNode ParseMemberExpression()
{
ExpressionNode leftSide = ParsePrimaryExpression();
while (_token.Id == TokenId.Dot)
{
NextToken();
_rangeRecorder.Begin();
Identifier memberName = ParseIdentifier();
SourceRange memberNameSourceRange = _rangeRecorder.End();
if (_token.Id != TokenId.LeftParentheses)
{
PropertyAccessExpression result = new PropertyAccessExpression();
result.Target = leftSide;
result.Name = memberName;
result.NameSourceRange = memberNameSourceRange;
leftSide = result;
}
else
{
ExpressionNode[] arguments = ParseExpressionList();
MethodInvocationExpression result = new MethodInvocationExpression();
result.Target = leftSide;
result.Name = memberName;
result.NameSourceRange = memberNameSourceRange;
result.Arguments = arguments;
leftSide = result;
}
}
return(leftSide);
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
VisitExpression(expression.Target);
_writer.Write(".");
_writer.WriteIdentifier(expression.Name);
return(expression);
}
public override AstElement Clone(Dictionary<AstElement, AstElement> alreadyClonedElements)
{
PropertyAccessExpression result = new PropertyAccessExpression();
result.Target = (ExpressionNode)_target.Clone(alreadyClonedElements);
result.Name = _name;
result.NameSourceRange = _nameSourceRange;
result.Property = _property;
return result;
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
ReflectionPropertyBinding reflectionPropertyBinding = expression.Property as ReflectionPropertyBinding;
ReflectionFieldBinding reflectionFieldBinding = expression.Property as ReflectionFieldBinding;
if (reflectionPropertyBinding != null)
{
EmitCall(reflectionPropertyBinding.PropertyInfo.GetGetMethod(), expression.Target);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Call, _unifyNullsMethod, null);
}
else if (reflectionFieldBinding != null)
{
Label finishLabel = _ilEmitContext.ILGenerator.DefineLabel();
Label loadNullLabel = _ilEmitContext.ILGenerator.DefineLabel();
int instanceIndex = DeclareLocal();
Visit(expression.Target);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, instanceIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, instanceIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Brfalse, loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, instanceIndex);
EmitThisArgumentPointer(expression.Target.ExpressionType);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldfld, reflectionFieldBinding.FieldInfo);
_ilEmitContext.ILGenerator.Emit(OpCodes.Br, finishLabel);
_ilEmitContext.ILGenerator.MarkLabel(loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldnull);
_ilEmitContext.ILGenerator.MarkLabel(finishLabel);
}
else
{
Label finishLabel = _ilEmitContext.ILGenerator.DefineLabel();
Label loadNullLabel = _ilEmitContext.ILGenerator.DefineLabel();
int argIndex = DeclareLocal();
Visit(expression.Target);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, argIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Brfalse, loadNullLabel);
ILParameterDeclaration customPropertyBinding = _ilEmitContext.GetParameters(expression)[0];
EmitLoadParameter(customPropertyBinding);
EmitThisArgumentPointer(typeof(PropertyBinding));
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argIndex);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Callvirt, _propertyBindingGetValueMethod, null);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Call, _unifyNullsMethod, null);
_ilEmitContext.ILGenerator.Emit(OpCodes.Br, finishLabel);
_ilEmitContext.ILGenerator.MarkLabel(loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldnull);
_ilEmitContext.ILGenerator.MarkLabel(finishLabel);
}
return(expression);
}
public override AstElement Clone(Dictionary <AstElement, AstElement> alreadyClonedElements)
{
PropertyAccessExpression result = new PropertyAccessExpression();
result.Target = (ExpressionNode)_target.Clone(alreadyClonedElements);
result.Name = _name;
result.NameSourceRange = _nameSourceRange;
result.Property = _property;
return(result);
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
base.VisitPropertyAccessExpression(expression);
bool isReflectionBinding = expression.Property is ReflectionPropertyBinding ||
expression.Property is ReflectionFieldBinding;
if (!isReflectionBinding)
_ilEmitContext.AddParameter(expression, expression.Property, typeof(PropertyBinding));
return expression;
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
_xmlWriter.WriteStartElement("propertyExpression");
_xmlWriter.WriteAttributeString("identifier", expression.Name.ToSource());
WriteTypeAttribute(expression.ExpressionType);
WriteAstNode("target", expression.Target);
_xmlWriter.WriteEndElement();
return(expression);
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
base.VisitPropertyAccessExpression(expression);
bool isReflectionBinding = expression.Property is ReflectionPropertyBinding ||
expression.Property is ReflectionFieldBinding;
if (!isReflectionBinding)
{
_ilEmitContext.AddParameter(expression, expression.Property, typeof(PropertyBinding));
}
return(expression);
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
base.VisitPropertyAccessExpression(expression);
if (expression.Target is ConstantExpression)
{
try
{
return(LiteralExpression.FromTypedValue(expression.GetValue(), expression.ExpressionType));
}
catch (RuntimeException ex)
{
_errorReporter.CannotFoldConstants(ex);
}
}
return(expression);
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
_xmlWriter.WriteStartElement("propertyExpression");
_xmlWriter.WriteAttributeString("identifier", expression.Name.ToSource());
WriteTypeAttribute(expression.ExpressionType);
WriteAstNode("target", expression.Target);
_xmlWriter.WriteEndElement();
return expression;
}
private static bool VisitPropertyAccessExpression(PropertyAccessExpression node1, PropertyAccessExpression node2)
{
return node2 != null &&
node1.Name == node2.Name &&
Visit(node1.Target, node2.Target);
}
private static bool VisitPropertyAccessExpression(PropertyAccessExpression node1, PropertyAccessExpression node2)
{
return(node2 != null &&
node1.Name == node2.Name &&
Visit(node1.Target, node2.Target));
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
VisitExpression(expression.Target);
_writer.Write(".");
_writer.WriteIdentifier(expression.Name);
return expression;
}
private ExpressionNode ParseMemberExpression()
{
ExpressionNode leftSide = ParsePrimaryExpression();
while (_token.Id == TokenId.Dot)
{
NextToken();
_rangeRecorder.Begin();
Identifier memberName = ParseIdentifier();
SourceRange memberNameSourceRange = _rangeRecorder.End();
if (_token.Id != TokenId.LeftParentheses)
{
PropertyAccessExpression result = new PropertyAccessExpression();
result.Target = leftSide;
result.Name = memberName;
result.NameSourceRange = memberNameSourceRange;
leftSide = result;
}
else
{
ExpressionNode[] arguments = ParseExpressionList();
MethodInvocationExpression result = new MethodInvocationExpression();
result.Target = leftSide;
result.Name = memberName;
result.NameSourceRange = memberNameSourceRange;
result.Arguments = arguments;
leftSide = result;
}
}
return leftSide;
}
public virtual ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
expression.Target = VisitExpression(expression.Target);
return(expression);
}
public virtual ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
expression.Target = VisitExpression(expression.Target);
return expression;
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
base.VisitPropertyAccessExpression(expression);
if (expression.Target is ConstantExpression)
{
try
{
return LiteralExpression.FromTypedValue(expression.GetValue(), expression.ExpressionType);
}
catch (RuntimeException ex)
{
_errorReporter.CannotFoldConstants(ex);
}
}
return expression;
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
// Resolve column
// -- or --
// Resolve property
NameExpression targetAsNameExpression = expression.Target as NameExpression;
if (targetAsNameExpression != null)
{
// Ok, the target is a name expression. Lets see whether it refers to a table
// or constant.
TableRefBinding tableRefBinding = ResolveTableRef(targetAsNameExpression.NameSourceRange, targetAsNameExpression.Name);
ConstantBinding constantBinding = ResolveConstant(targetAsNameExpression.NameSourceRange, targetAsNameExpression.Name);
if (tableRefBinding != null)
{
if (constantBinding != null)
{
// It can both refer to a constant and a table. We cannot resolve
// the ambiguity so we report an error and do nothing.
ErrorReporter.AmbiguousReference(expression.NameSourceRange, expression.Name, new Binding[] { constantBinding, tableRefBinding });
return expression;
}
// The target only refers to table. Resolve the column or method on the row type.
ColumnRefBinding columnRefBinding = ResolveColumnRef(tableRefBinding, expression.NameSourceRange, expression.Name);
if (columnRefBinding != null)
return new ColumnExpression(columnRefBinding);
if (!(tableRefBinding.TableBinding is DerivedTableBinding) && !(tableRefBinding.TableBinding is CommonTableBinding))
{
// Check if there is any method with this name declared. This helps to give a better
// error message.
MethodBinding[] methodBindings = _scope.DataContext.MetadataContext.FindMethod(tableRefBinding.TableBinding.RowType, expression.Name);
if (methodBindings != null && methodBindings.Length > 0)
{
// Report that methods calls require parentheses
ErrorReporter.InvocationRequiresParentheses(expression.NameSourceRange, methodBindings);
return expression;
}
}
// Report that no column with this name exists.
ErrorReporter.UndeclaredColumn(expression.NameSourceRange, tableRefBinding, expression.Name);
return expression;
}
// NOTE: If name does not refer to a table but to constant
// we fall through. The name node is resolved below
// (actually it is replaced in VisitNameExpression)
}
// Ok, it is not a table. Try to resolve a property.
expression.Target = VisitExpression(expression.Target);
if (expression.Target.ExpressionType == null)
return expression;
// To support custom properties we check if the target is a named constant or a parameter.
NamedConstantExpression namedConstantExpression = expression.Target as NamedConstantExpression;
ParameterExpression parameterExpression = expression.Target as ParameterExpression;
if (namedConstantExpression == null && parameterExpression == null)
{
// We cannot use custom properties in this case. Therfore
// we resolve the property using type specific properties.
expression.Property = ResolveTypeProperty(expression.Target.ExpressionType, expression.NameSourceRange, expression.Name);
}
else
{
// We can use custom properties. Get that value and the dataype.
IList<PropertyBinding> customProperties;
if (namedConstantExpression != null)
customProperties = namedConstantExpression.Constant.CustomProperties;
else
customProperties = parameterExpression.Parameter.CustomProperties;
if (customProperties != null)
{
// Resolve instance property.
expression.Property = ResolveCustomProperty(customProperties, expression.NameSourceRange, expression.Name);
}
else
{
// The constant or parameter did not have custom properties.
expression.Property = ResolveTypeProperty(expression.Target.ExpressionType, expression.NameSourceRange, expression.Name);
}
}
if (expression.Property == null)
{
// Check if there is any method with this name declared. This helps to give a better
// error message.
MethodBinding[] methodBindings = _scope.DataContext.MetadataContext.FindMethod(expression.Target.ExpressionType, expression.Name);
if (methodBindings != null && methodBindings.Length > 0)
{
// Report that methods calls require parentheses
ErrorReporter.InvocationRequiresParentheses(expression.NameSourceRange, methodBindings);
}
else
{
// Report that no property with this name exists.
ErrorReporter.UndeclaredProperty(expression.NameSourceRange, expression.Target.ExpressionType, expression.Name);
}
}
return expression;
}
public override ExpressionNode VisitPropertyAccessExpression(PropertyAccessExpression expression)
{
ReflectionPropertyBinding reflectionPropertyBinding = expression.Property as ReflectionPropertyBinding;
ReflectionFieldBinding reflectionFieldBinding = expression.Property as ReflectionFieldBinding;
if (reflectionPropertyBinding != null)
{
EmitCall(reflectionPropertyBinding.PropertyInfo.GetGetMethod(), expression.Target);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Call, _unifyNullsMethod, null);
}
else if (reflectionFieldBinding != null)
{
Label finishLabel = _ilEmitContext.ILGenerator.DefineLabel();
Label loadNullLabel = _ilEmitContext.ILGenerator.DefineLabel();
int instanceIndex = DeclareLocal();
Visit(expression.Target);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, instanceIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, instanceIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Brfalse, loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, instanceIndex);
EmitThisArgumentPointer(expression.Target.ExpressionType);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldfld, reflectionFieldBinding.FieldInfo);
_ilEmitContext.ILGenerator.Emit(OpCodes.Br, finishLabel);
_ilEmitContext.ILGenerator.MarkLabel(loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldnull);
_ilEmitContext.ILGenerator.MarkLabel(finishLabel);
}
else
{
Label finishLabel = _ilEmitContext.ILGenerator.DefineLabel();
Label loadNullLabel = _ilEmitContext.ILGenerator.DefineLabel();
int argIndex = DeclareLocal();
Visit(expression.Target);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, argIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Brfalse, loadNullLabel);
ILParameterDeclaration customPropertyBinding = _ilEmitContext.GetParameters(expression)[0];
EmitLoadParameter(customPropertyBinding);
EmitThisArgumentPointer(typeof(PropertyBinding));
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argIndex);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Callvirt, _propertyBindingGetValueMethod, null);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Call, _unifyNullsMethod, null);
_ilEmitContext.ILGenerator.Emit(OpCodes.Br, finishLabel);
_ilEmitContext.ILGenerator.MarkLabel(loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldnull);
_ilEmitContext.ILGenerator.MarkLabel(finishLabel);
}
return expression;
}
