public static bool TryBind(SyntaxTreeNode node, BindingContext bindingContext, TypeDescription expectedType, out Expression boundExpression, out Exception bindingError)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
if (expectedType == null)
{
throw new ArgumentNullException("expectedType");
}
if (TryBindMethodCall(node, bindingContext, expectedType, out boundExpression, out bindingError))
{
return(true);
}
var targetNode = node.GetExpression(throwOnError: true);
var arguments = node.GetArguments(throwOnError: false);
var target = default(Expression);
if (AnyBinder.TryBind(targetNode, bindingContext, TypeDescription.ObjectType, out target, out bindingError) == false)
{
return(false);
}
Debug.Assert(target != null, "target != null");
var typeDescription = TypeDescription.GetTypeDescription(target.Type);
if (typeDescription.IsDelegate == false)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOINVOKENONDELEG, target.Type), node);
return(false);
}
var methodDescription = typeDescription.GetMembers(Constants.DELEGATE_INVOKE_NAME).FirstOrDefault(m => m.IsMethod && !m.IsStatic);
if (methodDescription == null)
{
throw new MissingMethodException(string.Format(Properties.Resources.EXCEPTION_BIND_MISSINGMETHOD, target.Type.FullName, Constants.DELEGATE_INVOKE_NAME));
}
var expressionQuality = 0.0f;
if (methodDescription.TryMakeCall(target, arguments, bindingContext, out boundExpression, out expressionQuality) == false)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOBINDDELEG, target.Type, methodDescription), node);
return(false);
}
return(true);
}
public static bool TryBind(SyntaxTreeNode node, BindingContext bindingContext, TypeDescription expectedType, out Expression boundExpression, out Exception bindingError)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
if (expectedType == null)
{
throw new ArgumentNullException("expectedType");
}
boundExpression = null;
bindingError = null;
var newNode = node.GetNewExpression(throwOnError: true);
var newExpression = default(Expression);
if (AnyBinder.TryBind(newNode, bindingContext, TypeDescription.ObjectType, out newExpression, out bindingError) == false ||
newExpression is NewExpression == false)
{
if (bindingError == null)
{
bindingError = new ExpressionParserException(Properties.Resources.EXCEPTION_BIND_FAILEDTOBINDNEWEXPRESSION, node);
}
return(false);
}
var initializers = default(ElementInit[]);
if (TryGetListInitializers(node, bindingContext, out initializers, out bindingError) == false)
{
if (bindingError == null)
{
bindingError = new ExpressionParserException(Properties.Resources.EXCEPTION_BIND_FAILEDTOBINDLISTINITIALIZERS, node);
}
return(false);
}
boundExpression = Expression.ListInit((NewExpression)newExpression, initializers);
return(true);
}
public static bool TryBind(SyntaxTreeNode node, BindingContext bindingContext, TypeDescription expectedType, out Expression boundExpression, out Exception bindingError)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
if (expectedType == null)
{
throw new ArgumentNullException("expectedType");
}
boundExpression = null;
bindingError = null;
var target = default(Expression);
var targetNode = node.GetExpression(throwOnError: false);
var propertyOrFieldName = node.GetPropertyOrFieldName(throwOnError: true);
var useNullPropagation = node.GetUseNullPropagation(throwOnError: false);
var targetType = default(Type);
var isStatic = false;
if (bindingContext.TryResolveType(targetNode, out targetType))
{
target = null;
isStatic = true;
}
else if (targetNode == null)
{
target = bindingContext.Global;
targetType = target != null ? target.Type : null;
isStatic = false;
switch (propertyOrFieldName)
{
case Constants.VALUE_NULL_STRING:
boundExpression = ExpressionUtils.NullConstant;
return(true);
case Constants.VALUE_TRUE_STRING:
boundExpression = ExpressionUtils.TrueConstant;
return(true);
case Constants.VALUE_FALSE_STRING:
boundExpression = ExpressionUtils.TrueConstant;
return(false);
default:
if (bindingContext.TryGetParameter(propertyOrFieldName, out boundExpression))
{
return(true);
}
break;
}
}
else if (AnyBinder.TryBind(targetNode, bindingContext, TypeDescription.ObjectType, out target, out bindingError))
{
Debug.Assert(target != null, "target != null");
targetType = target.Type;
isStatic = false;
}
else
{
target = null;
targetType = null;
}
if (target == null && targetType == null)
{
if (bindingError == null)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVENAME, propertyOrFieldName), node);
}
return(false);
}
Debug.Assert(targetType != null, "type != null");
var targetTypeDescription = TypeDescription.GetTypeDescription(targetType);
if (isStatic && targetTypeDescription.IsEnum)
{
var fieldMemberDescription = targetTypeDescription.GetMembers(propertyOrFieldName).FirstOrDefault(m => m.IsStatic);
if (fieldMemberDescription == null)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVEMEMBERONTYPE, propertyOrFieldName, targetType), node);
return(false);
}
boundExpression = fieldMemberDescription.ConstantValueExpression;
}
else
{
foreach (var member in targetTypeDescription.GetMembers(propertyOrFieldName))
{
if (member.IsStatic != isStatic || member.IsPropertyOrField == false)
{
continue;
}
if (member.TryMakeAccessor(target, out boundExpression))
{
break;
}
}
}
if (boundExpression == null)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVEMEMBERONTYPE, propertyOrFieldName, targetType), node);
return(false);
}
if (useNullPropagation && isStatic)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOAPPLYNULLCONDITIONALOPERATORONTYPEREF, targetType));
return(false);
}
if (useNullPropagation && targetTypeDescription.CanBeNull)
{
bindingContext.RegisterNullPropagationTarget(target);
}
return(true);
}
public static bool TryBind(SyntaxTreeNode node, BindingContext bindingContext, TypeDescription expectedType, out Expression boundExpression, out Exception bindingError)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
if (expectedType == null)
{
throw new ArgumentNullException("expectedType");
}
boundExpression = null;
bindingError = null;
var target = default(Expression);
var arguments = node.GetArguments(throwOnError: false);
var methodName = node.GetMethodName(throwOnError: true);
var useNullPropagation = node.GetUseNullPropagation(throwOnError: false);
var methodMember = default(MemberDescription);
if (bindingContext.TryResolveMember(methodName, out methodMember))
{
if (methodMember.IsMethod == false)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_CALLMEMBERISNOTMETHOD, methodMember.Name, methodMember.DeclaringType), node);
return(false);
}
var targetNode = node.GetExpression(throwOnError: true);
if (AnyBinder.TryBind(targetNode, bindingContext, TypeDescription.ObjectType, out target, out bindingError) == false)
{
return(false);
}
float methodQuality;
if (methodMember.TryMakeCall(target, arguments, bindingContext, out boundExpression, out methodQuality) == false)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOBINDMETHOD, methodMember.Name, target.Type, arguments.Count), node);
return(false);
}
return(true);
}
var methodRef = default(TypeReference);
if (BindingContext.TryGetMethodReference(methodName, out methodRef) == false)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVENAME, methodName), node);
return(false);
}
var targetType = default(Type);
if (TryBindTarget(node, bindingContext, out target, out targetType, out bindingError) == false)
{
return(false);
}
var isStatic = target == null;
var selectedMethodQuality = MemberDescription.QUALITY_INCOMPATIBLE;
var hasGenericParameters = methodRef.IsGenericType;
var genericArguments = default(Type[]);
if (hasGenericParameters)
{
genericArguments = new Type[methodRef.TypeArguments.Count];
for (var i = 0; i < genericArguments.Length; i++)
{
var typeArgument = methodRef.TypeArguments[i];
if (bindingContext.TryResolveType(typeArgument, out genericArguments[i]) == false)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVETYPE, typeArgument), node);
return(false);
}
}
}
var targetTypeDescription = TypeDescription.GetTypeDescription(targetType);
var foundMethod = default(MethodInfo);
foreach (var memberDescription in targetTypeDescription.GetMembers(methodRef.Name))
{
if (memberDescription.IsMethod == false)
{
continue;
}
var methodDescription = memberDescription;
var method = (MethodInfo)memberDescription;
foundMethod = foundMethod ?? method;
if (method.IsStatic != isStatic || method.IsGenericMethod != hasGenericParameters)
{
continue;
}
if (hasGenericParameters && memberDescription.GenericArgumentsCount != methodRef.TypeArguments.Count)
{
continue;
}
if (hasGenericParameters)
{
try
{
methodDescription = methodDescription.MakeGenericMethod(genericArguments);
method = methodDescription;
}
catch (ArgumentException exception)
{
bindingError = exception;
continue; /* An element of typeArguments does not satisfy the constraints specified for the corresponding type parameter of the current generic method definition. */
}
}
var methodQuality = 0.0f;
var methodCallExpression = default(Expression);
if (methodDescription.TryMakeCall(target, arguments, bindingContext, out methodCallExpression, out methodQuality) == false)
{
continue;
}
if (float.IsNaN(methodQuality) || methodQuality <= selectedMethodQuality)
{
continue;
}
boundExpression = methodCallExpression;
selectedMethodQuality = methodQuality;
if (Math.Abs(methodQuality - MemberDescription.QUALITY_EXACT_MATCH) < float.Epsilon)
{
break; // best match
}
}
if (bindingError != null)
{
return(false);
}
if (boundExpression == null)
{
if (foundMethod != null)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOBINDMETHOD, methodRef.Name, targetType, arguments.Count), node);
}
else
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOBINDCALL, methodRef.Name, targetType, arguments.Count), node);
}
return(false);
}
if (useNullPropagation && target == null)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETOAPPLYNULLCONDITIONALOPERATORONTYPEREF, targetType));
return(false);
}
if (useNullPropagation && targetTypeDescription.CanBeNull)
{
bindingContext.RegisterNullPropagationTarget(target);
}
if (targetTypeDescription.IsAssignableFrom(typeof(Type)) &&
bindingContext.IsKnownType(typeof(Type)) == false &&
(bindingContext.IsKnownType(targetType) == false || methodRef.Name.Equals("InvokeMember", StringComparison.Ordinal)))
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_RESTRICTED_MEMBER_INVOCATION, methodName, targetType, typeof(ITypeResolver)), node);
return(false);
}
return(true);
}
public static bool TryBind(SyntaxTreeNode node, BindingContext bindingContext, TypeDescription expectedType, out Expression boundExpression, out Exception bindingError)
{
boundExpression = null;
bindingError = null;
var useNullPropagation = node.GetUseNullPropagation(throwOnError: false);
var arguments = node.GetArguments(throwOnError: true);
var targetNode = node.GetExpression(throwOnError: true);
var target = default(Expression);
if (AnyBinder.TryBind(targetNode, bindingContext, TypeDescription.ObjectType, out target, out bindingError) == false)
{
return(false);
}
Debug.Assert(target != null, "target != null");
var targetTypeDescription = TypeDescription.GetTypeDescription(target.Type);
if (target.Type.IsArray)
{
var indexType = TypeDescription.Int32Type;
var indexingExpressions = new Expression[arguments.Count];
for (var i = 0; i < indexingExpressions.Length; i++)
{
var argument = default(SyntaxTreeNode);
if (arguments.TryGetValue(i, out argument) == false)
{
bindingError = new ExpressionParserException(string.Format(Resources.EXCEPTION_BIND_MISSINGMETHODPARAMETER, i), node);
return(false);
}
if (AnyBinder.TryBindInNewScope(argument, bindingContext, indexType, out indexingExpressions[i], out bindingError) == false)
{
return(false);
}
Debug.Assert(indexingExpressions[i] != null, "indexingExpressions[i] != null");
}
try
{
if (indexingExpressions.Length == 1)
{
boundExpression = Expression.ArrayIndex(target, indexingExpressions[0]);
}
else
{
boundExpression = Expression.ArrayIndex(target, indexingExpressions);
}
}
catch (Exception exception)
{
bindingError = new ExpressionParserException(exception.Message, exception, node);
return(false);
}
}
else
{
var selectedIndexerQuality = MemberDescription.QUALITY_INCOMPATIBLE;
foreach (var indexer in targetTypeDescription.Indexers)
{
var indexerQuality = MemberDescription.QUALITY_INCOMPATIBLE;
var indexerCall = default(Expression);
if (indexer.TryMakeCall(target, arguments, bindingContext, out indexerCall, out indexerQuality) == false)
{
continue;
}
if (indexerQuality <= selectedIndexerQuality)
{
continue;
}
boundExpression = indexerCall;
selectedIndexerQuality = indexerQuality;
}
}
if (boundExpression == null)
{
bindingError = new ExpressionParserException(string.Format(Resources.EXCEPTION_BIND_UNABLETOBINDINDEXER, target.Type), node);
return(false);
}
if (useNullPropagation && targetTypeDescription.CanBeNull)
{
bindingContext.RegisterNullPropagationTarget(target);
}
return(true);
}
public static bool TryBindMethodCall(SyntaxTreeNode node, BindingContext bindingContext, TypeDescription expectedType, out Expression boundExpression, out Exception bindingError)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
if (expectedType == null)
{
throw new ArgumentNullException("expectedType");
}
// bindingError could return null from this method
bindingError = null;
boundExpression = null;
var methodNameNode = node.GetExpression(throwOnError: true);
var methodNameNodeType = methodNameNode.GetExpressionType(throwOnError: true);
if (methodNameNodeType != Constants.EXPRESSION_TYPE_PROPERTY_OR_FIELD &&
methodNameNodeType != Constants.EXPRESSION_TYPE_MEMBER_RESOLVE)
{
return(false);
}
var methodTargetNode = methodNameNode.GetExpression(throwOnError: false);
var methodTarget = default(Expression);
var type = default(Type);
var typeReference = default(TypeReference);
var isStatic = false;
if (methodTargetNode == null && bindingContext.Global != null)
{
methodTarget = bindingContext.Global;
type = methodTarget.Type;
isStatic = false;
}
else if (methodTargetNode == null)
{
var methodName = methodNameNode.GetMemberName(throwOnError: false);
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVENAME, methodName ?? "<unknown>"), node);
return(false);
}
else if (BindingContext.TryGetTypeReference(methodTargetNode, out typeReference) && bindingContext.TryResolveType(typeReference, out type))
{
isStatic = true;
}
else if (AnyBinder.TryBind(methodTargetNode, bindingContext, TypeDescription.ObjectType, out methodTarget, out bindingError))
{
Debug.Assert(methodTarget != null, "methodTarget != null");
isStatic = false;
type = methodTarget.Type;
}
else
{
if (typeReference != null && bindingError == null)
{
bindingError = new ExpressionParserException(string.Format(Properties.Resources.EXCEPTION_BIND_UNABLETORESOLVETYPE, typeReference), node);
}
return(false);
}
var methodRef = default(TypeReference);
if (type == null || BindingContext.TryGetMethodReference(methodNameNode, out methodRef) == false)
{
return(false);
}
var typeDescription = TypeDescription.GetTypeDescription(type);
foreach (var member in typeDescription.GetMembers(methodRef.Name))
{
if (member.IsMethod == false || member.IsStatic != isStatic)
{
continue;
}
var callNode = new SyntaxTreeNode(new Dictionary <string, object>
{
{ Constants.EXPRESSION_ATTRIBUTE, methodTarget ?? (object)type },
{ Constants.ARGUMENTS_ATTRIBUTE, node.GetValueOrDefault(Constants.ARGUMENTS_ATTRIBUTE, default(object)) },
{ Constants.METHOD_ATTRIBUTE, methodRef },
{ Constants.USE_NULL_PROPAGATION_ATTRIBUTE, methodNameNode.GetValueOrDefault(Constants.USE_NULL_PROPAGATION_ATTRIBUTE, default(object)) },
{ Constants.EXPRESSION_POSITION, methodNameNode.GetPosition(throwOnError: false) }
});
return(CallBinder.TryBind(callNode, bindingContext, expectedType, out boundExpression, out bindingError));
}
return(false);
}
