/// <summary>
/// Returns syntax for initializing a new instance of the provided type.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>Syntax for initializing a new instance of the provided type.</returns>
private static ExpressionSyntax GetObjectCreationExpressionSyntax(Type type)
{
ExpressionSyntax result;
var typeInfo = type.GetTypeInfo();
if (typeInfo.IsValueType)
{
// Use the default value.
result = SF.DefaultExpression(typeInfo.AsType().GetTypeSyntax());
}
else if (GetEmptyConstructor(typeInfo) != null)
{
// Use the default constructor.
result = SF.ObjectCreationExpression(typeInfo.AsType().GetTypeSyntax()).AddArgumentListArguments();
}
else
{
// Create an unformatted object.
Expression <Func <object> > getUninitializedObject =
() => FormatterServices.GetUninitializedObject(default(Type));
result = SF.CastExpression(
type.GetTypeSyntax(),
getUninitializedObject.Invoke()
.AddArgumentListArguments(
SF.Argument(SF.TypeOfExpression(typeInfo.AsType().GetTypeSyntax()))));
}
return(result);
}
public ExpressionSyntax GetGetter(ExpressionSyntax instance, bool forceAvoidCopy = false)
{
Expression <Action> fieldGetter = () => this.FieldInfo.GetValue(default(object));
var getFieldExpression =
fieldGetter.Invoke(this.FieldInfoExpression).AddArgumentListArguments(SF.Argument(instance));
// If the field is the backing field for an auto-property, try to use the property directly.
var propertyName = Regex.Match(this.FieldInfo.Name, "^<([^>]+)>.*$");
if (propertyName.Success && this.FieldInfo.DeclaringType != null)
{
var name = propertyName.Groups[1].Value;
var property = this.FieldInfo.DeclaringType.GetProperty(name, BindingFlags.Instance | BindingFlags.Public);
if (property != null && property.GetGetMethod() != null)
{
return(instance.Member(property.Name));
}
}
if (forceAvoidCopy || this.FieldInfo.FieldType.IsOrleansShallowCopyable())
{
// Shallow-copy the field.
return(getFieldExpression);
}
// Deep-copy the field.
Expression <Action> deepCopyInner = () => SerializationManager.DeepCopyInner(default(object));
return(SF.CastExpression(
this.FieldInfo.FieldType.GetTypeSyntax(),
deepCopyInner.Invoke().AddArgumentListArguments(SF.Argument(getFieldExpression))));
}
/// <summary>
/// Generates syntax to invoke a method on a grain.
/// </summary>
/// <param name="grainType">
/// The grain type.
/// </param>
/// <param name="grain">
/// The grain instance expression.
/// </param>
/// <param name="method">
/// The method.
/// </param>
/// <param name="arguments">
/// The arguments expression.
/// </param>
/// <returns>
/// Syntax to invoke a method on a grain.
/// </returns>
private static StatementSyntax[] GenerateInvokeForMethod(
Type grainType,
IdentifierNameSyntax grain,
MethodInfo method,
ExpressionSyntax arguments)
{
var castGrain = SF.ParenthesizedExpression(SF.CastExpression(grainType.GetTypeSyntax(), grain));
// Construct expressions to retrieve each of the method's parameters.
var parameters = new List <ExpressionSyntax>();
var methodParameters = method.GetParameters().ToList();
for (var i = 0; i < methodParameters.Count; i++)
{
var parameter = methodParameters[i];
var parameterType = parameter.ParameterType.GetTypeSyntax();
var indexArg = SF.Argument(SF.LiteralExpression(SyntaxKind.NumericLiteralExpression, SF.Literal(i)));
var arg = SF.CastExpression(
parameterType,
SF.ElementAccessExpression(arguments).AddArgumentListArguments(indexArg));
parameters.Add(arg);
}
// Invoke the method.
var grainMethodCall =
SF.InvocationExpression(castGrain.Member(method.Name))
.AddArgumentListArguments(parameters.Select(SF.Argument).ToArray());
if (method.ReturnType == typeof(void))
{
var completed = (Expression <Func <Task <object> > >)(() => TaskUtility.Completed());
return(new StatementSyntax[]
{
SF.ExpressionStatement(grainMethodCall), SF.ReturnStatement(completed.Invoke())
});
}
//// Generate a Task wrapper for a query method
//if (GrainInterfaceUtils.IsQueryType(method.ReturnType))
//{
// var TaskFromResult = SF.InvocationExpression(
// SF.MemberAccessExpression(
// SyntaxKind.SimpleMemberAccessExpression,
// SF.IdentifierName("global::System.Threading.Tasks.Task"),
// SF.IdentifierName("FromResult")),
// SF.ArgumentList(SF.SeparatedList(new[] { SF.Argument(grainMethodCall) })));
// return new StatementSyntax[]
//{
// SF.ReturnStatement(SF.InvocationExpression(TaskFromResult.Member((Task _) => _.Box())))
//};
//}
// The invoke method expects a Task<object>, so we need to upcast the returned value.
// For methods which do not return a value, the Box extension method returns a meaningless value.
return(new StatementSyntax[]
{
SF.ReturnStatement(SF.InvocationExpression(grainMethodCall.Member((Task _) => _.Box())))
});
}
/// <summary>
/// Returns syntax for retrieving the value of this field, deep copying it if necessary.
/// </summary>
/// <param name="instance">The instance of the containing type.</param>
/// <param name="serializationContextExpression">The expression used to retrieve the serialization context.</param>
/// <param name="forceAvoidCopy">Whether or not to ensure that no copy of the field is made.</param>
/// <returns>Syntax for retrieving the value of this field.</returns>
public ExpressionSyntax GetGetter(ExpressionSyntax instance, ExpressionSyntax serializationContextExpression = null, bool forceAvoidCopy = false)
{
// Retrieve the value of the field.
var getValueExpression = this.GetValueExpression(instance);
// Avoid deep-copying the field if possible.
if (forceAvoidCopy || this.FieldInfo.FieldType.IsOrleansShallowCopyable())
{
// Return the value without deep-copying it.
return(getValueExpression);
}
// Addressable arguments must be converted to references before passing.
// IGrainObserver instances cannot be directly converted to references, therefore they are not included.
ExpressionSyntax deepCopyValueExpression;
if (typeof(IAddressable).IsAssignableFrom(this.FieldInfo.FieldType) &&
this.FieldInfo.FieldType.GetTypeInfo().IsInterface &&
!typeof(IGrainObserver).IsAssignableFrom(this.FieldInfo.FieldType))
{
var getAsReference = getValueExpression.Member(
(IAddressable grain) => grain.AsReference <IGrain>(),
this.FieldInfo.FieldType);
// If the value is not a GrainReference, convert it to a strongly-typed GrainReference.
// C#: (value == null || value is GrainReference) ? value : value.AsReference<TInterface>()
deepCopyValueExpression =
SF.ConditionalExpression(
SF.ParenthesizedExpression(
SF.BinaryExpression(
SyntaxKind.LogicalOrExpression,
SF.BinaryExpression(
SyntaxKind.EqualsExpression,
getValueExpression,
SF.LiteralExpression(SyntaxKind.NullLiteralExpression)),
SF.BinaryExpression(
SyntaxKind.IsExpression,
getValueExpression,
typeof(GrainReference).GetTypeSyntax()))),
getValueExpression,
SF.InvocationExpression(getAsReference));
}
else
{
deepCopyValueExpression = getValueExpression;
}
// Deep-copy the value.
Expression <Action> deepCopyInner = () => SerializationManager.DeepCopyInner(default(object), default(ICopyContext));
var typeSyntax = this.FieldInfo.FieldType.GetTypeSyntax();
return(SF.CastExpression(
typeSyntax,
deepCopyInner.Invoke()
.AddArgumentListArguments(
SF.Argument(deepCopyValueExpression),
SF.Argument(serializationContextExpression))));
}
/// <summary>
/// Returns syntax for the deserializer method.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="fields">The fields.</param>
/// <returns>Syntax for the deserializer method.</returns>
private static MemberDeclarationSyntax GenerateDeserializerMethod(Type type, List <FieldInfoMember> fields)
{
Expression <Action> deserializeInner =
() => SerializationManager.DeserializeInner(default(Type), default(IDeserializationContext));
var contextParameter = SF.IdentifierName("context");
var resultDeclaration =
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("result")
.WithInitializer(SF.EqualsValueClause(GetObjectCreationExpressionSyntax(type)))));
var resultVariable = SF.IdentifierName("result");
var body = new List <StatementSyntax> {
resultDeclaration
};
// Value types cannot be referenced, only copied, so there is no need to box & record instances of value types.
if (!type.GetTypeInfo().IsValueType)
{
// Record the result for cyclic deserialization.
Expression <Action <IDeserializationContext> > recordObject = ctx => ctx.RecordObject(default(object));
var currentSerializationContext = contextParameter;
body.Add(
SF.ExpressionStatement(
recordObject.Invoke(currentSerializationContext)
.AddArgumentListArguments(SF.Argument(resultVariable))));
}
// Deserialize all fields.
foreach (var field in fields)
{
var deserialized =
deserializeInner.Invoke()
.AddArgumentListArguments(
SF.Argument(SF.TypeOfExpression(field.Type)),
SF.Argument(contextParameter));
body.Add(
SF.ExpressionStatement(
field.GetSetter(
resultVariable,
SF.CastExpression(field.Type, deserialized))));
}
body.Add(SF.ReturnStatement(SF.CastExpression(type.GetTypeSyntax(), resultVariable)));
return
(SF.MethodDeclaration(typeof(object).GetTypeSyntax(), "Deserializer")
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword), SF.Token(SyntaxKind.StaticKeyword))
.AddParameterListParameters(
SF.Parameter(SF.Identifier("expected")).WithType(typeof(Type).GetTypeSyntax()),
SF.Parameter(SF.Identifier("context")).WithType(typeof(IDeserializationContext).GetTypeSyntax()))
.AddBodyStatements(body.ToArray())
.AddAttributeLists(
SF.AttributeList()
.AddAttributes(SF.Attribute(typeof(DeserializerMethodAttribute).GetNameSyntax()))));
}
private static MemberDeclarationSyntax GenerateDeserializerMethod(Type type, List <FieldInfoMember> fields)
{
Expression <Action> deserializeInner =
() => SerializationManager.DeserializeInner(default(Type), default(BinaryTokenStreamReader));
var streamParameter = SF.IdentifierName("stream");
var resultDeclaration =
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("result")
.WithInitializer(SF.EqualsValueClause(GetObjectCreationExpressionSyntax(type)))));
var resultVariable = SF.IdentifierName("result");
var boxedResultVariable = resultVariable;
var body = new List <StatementSyntax> {
resultDeclaration
};
if (type.IsValueType)
{
// For value types, we need to box the result for reflection-based setters to work.
body.Add(SF.LocalDeclarationStatement(
SF.VariableDeclaration(typeof(object).GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("boxedResult").WithInitializer(SF.EqualsValueClause(resultVariable)))));
boxedResultVariable = SF.IdentifierName("boxedResult");
}
// Deserialize all fields.
foreach (var field in fields)
{
var deserialized =
deserializeInner.Invoke()
.AddArgumentListArguments(
SF.Argument(SF.TypeOfExpression(field.Type)),
SF.Argument(streamParameter));
body.Add(
SF.ExpressionStatement(
field.GetSetter(
resultVariable,
SF.CastExpression(field.Type, deserialized),
boxedResultVariable)));
}
body.Add(SF.ReturnStatement(SF.CastExpression(type.GetTypeSyntax(), boxedResultVariable)));
return
(SF.MethodDeclaration(typeof(object).GetTypeSyntax(), "Deserializer")
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword), SF.Token(SyntaxKind.StaticKeyword))
.AddParameterListParameters(
SF.Parameter(SF.Identifier("expected")).WithType(typeof(Type).GetTypeSyntax()),
SF.Parameter(SF.Identifier("stream")).WithType(typeof(BinaryTokenStreamReader).GetTypeSyntax()))
.AddBodyStatements(body.ToArray())
.AddAttributeLists(
SF.AttributeList()
.AddAttributes(SF.Attribute(typeof(DeserializerMethodAttribute).GetNameSyntax()))));
}
/// <summary>
/// Generates syntax to invoke a method on a grain.
/// </summary>
/// <param name="grainType">
/// The grain type.
/// </param>
/// <param name="grain">
/// The grain instance expression.
/// </param>
/// <param name="method">
/// The method.
/// </param>
/// <param name="arguments">
/// The arguments expression.
/// </param>
/// <returns>
/// Syntax to invoke a method on a grain.
/// </returns>
private static StatementSyntax[] GenerateInvokeForMethod(
Type grainType,
IdentifierNameSyntax grain,
MethodInfo method,
ExpressionSyntax arguments)
{
var castGrain = SF.ParenthesizedExpression(SF.CastExpression(grainType.GetTypeSyntax(), grain));
// Construct expressions to retrieve each of the method's parameters.
var parameters = new List <ExpressionSyntax>();
var methodParameters = method.GetParameters().ToList();
for (var i = 0; i < methodParameters.Count; i++)
{
var parameter = methodParameters[i];
var parameterType = parameter.ParameterType.GetTypeSyntax();
var indexArg = SF.Argument(SF.LiteralExpression(SyntaxKind.NumericLiteralExpression, SF.Literal(i)));
var arg = SF.CastExpression(
parameterType,
SF.ElementAccessExpression(arguments).AddArgumentListArguments(indexArg));
parameters.Add(arg);
}
// Invoke the method.
var grainMethodCall =
SF.InvocationExpression(castGrain.Member(method.Name))
.AddArgumentListArguments(parameters.Select(SF.Argument).ToArray());
// For void methods, invoke the method and return a completed task.
if (method.ReturnType == typeof(void))
{
var completed = (Expression <Func <Task <object> > >)(() => TaskUtility.Completed());
return(new StatementSyntax[]
{
SF.ExpressionStatement(grainMethodCall), SF.ReturnStatement(completed.Invoke())
});
}
// For methods which return the expected type, Task<object>, simply return that.
if (method.ReturnType == typeof(Task <object>))
{
return(new StatementSyntax[] { SF.ReturnStatement(grainMethodCall) });
}
// The invoke method expects a Task<object>, so we need to upcast the returned value.
// For methods which do not return a value, the Box extension method returns a meaningless value.
return(new StatementSyntax[]
{
SF.ReturnStatement(SF.InvocationExpression(grainMethodCall.Member((Task _) => _.Box())))
});
}
private static MemberDeclarationSyntax GenerateSerializerMethod(Type type, List <FieldInfoMember> fields)
{
Expression <Action> serializeInner =
() =>
SerializationManager.SerializeInner(default(object), default(ISerializationContext), default(Type));
var contextParameter = SF.IdentifierName("context");
var body = new List <StatementSyntax>
{
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("input")
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(type.GetTypeSyntax(), SF.IdentifierName("untypedInput"))))))
};
var inputExpression = SF.IdentifierName("input");
// Serialize all members.
foreach (var field in fields)
{
body.Add(
SF.ExpressionStatement(
serializeInner.Invoke()
.AddArgumentListArguments(
SF.Argument(field.GetGetter(inputExpression, forceAvoidCopy: true)),
SF.Argument(contextParameter),
SF.Argument(SF.TypeOfExpression(field.FieldInfo.FieldType.GetTypeSyntax())))));
}
return
(SF.MethodDeclaration(typeof(void).GetTypeSyntax(), "Serializer")
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword), SF.Token(SyntaxKind.StaticKeyword))
.AddParameterListParameters(
SF.Parameter(SF.Identifier("untypedInput")).WithType(typeof(object).GetTypeSyntax()),
SF.Parameter(SF.Identifier("context")).WithType(typeof(ISerializationContext).GetTypeSyntax()),
SF.Parameter(SF.Identifier("expected")).WithType(typeof(Type).GetTypeSyntax()))
.AddBodyStatements(body.ToArray())
.AddAttributeLists(
SF.AttributeList()
.AddAttributes(SF.Attribute(typeof(SerializerMethodAttribute).GetNameSyntax()))));
}
/// <summary>
/// Generates a method.
/// </summary>
/// <param name="methodDescription">
/// The method description.
/// </param>
/// <returns>
/// The generated method.
/// </returns>
/// <exception cref="ArgumentException">
/// The return type of the provided method is not supported.
/// </exception>
private static MethodDeclarationSyntax GenerateMethod(ActorMethodDescription methodDescription)
{
// Types
var method = methodDescription.MethodInfo;
Type asyncReturnType;
if (!method.ReturnType.IsGenericType && (method.ReturnType == typeof(Task)))
{
asyncReturnType = typeof(void);
}
else if (method.ReturnType.GetGenericTypeDefinition() == typeof(Task <>))
{
asyncReturnType = method.ReturnType.GenericTypeArguments[0];
}
else
{
throw new ArgumentException("Method return type is not Task or Task<T>.");
}
// Body statements
var parameterReferences =
method.GetParameters()
.Select(
p => SF.Argument(SF.CastExpression(typeof(object).GetTypeSyntax(), SF.IdentifierName(p.Name))))
.ToArray();
var writeEventMethod = SF.ThisExpression().Member((EventProducerBase <object> _) => _.WriteEvent(default(string), default(object), default(object)));
var writeEvent =
SF.ExpressionStatement(
SF.AwaitExpression(
SF.InvocationExpression(writeEventMethod)
.AddArgumentListArguments(SF.Argument(methodDescription.Name.GetLiteralExpression()))
.AddArgumentListArguments(parameterReferences)));
var returnValue = asyncReturnType == typeof(void) ? null : SF.DefaultExpression(asyncReturnType.GetTypeSyntax());
// Build and return the method.
return
(SF.MethodDeclaration(method.ReturnType.GetTypeSyntax(), methodDescription.MethodInfo.Name)
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword), SF.Token(SyntaxKind.AsyncKeyword))
.AddParameterListParameters(method.GetParameterListSyntax())
.AddBodyStatements(writeEvent, SF.ReturnStatement(returnValue)));
}
/// <summary>
/// Returns syntax for retrieving the value of this field, deep copying it if neccessary.
/// </summary>
/// <param name="instance">The instance of the containing type.</param>
/// <param name="forceAvoidCopy">Whether or not to ensure that no copy of the field is made.</param>
/// <returns>Syntax for retrieving the value of this field.</returns>
public ExpressionSyntax GetGetter(ExpressionSyntax instance, bool forceAvoidCopy = false)
{
// Retrieve the value of the field.
var getValueExpression = this.GetValueExpression(instance);
// Avoid deep-copying the field if possible.
if (forceAvoidCopy || this.FieldInfo.FieldType.IsOrleansShallowCopyable())
{
// Return the value without deep-copying it.
return getValueExpression;
}
// Deep-copy the value.
Expression<Action> deepCopyInner = () => SerializationManager.DeepCopyInner(default(object));
var typeSyntax = this.FieldInfo.FieldType.GetTypeSyntax();
return SF.CastExpression(
typeSyntax,
deepCopyInner.Invoke().AddArgumentListArguments(SF.Argument(getValueExpression)));
}
private MemberDeclarationSyntax MockProviderMethod()
{
var m = F.MethodDeclaration(MockMemberType, F.Identifier(MemberMockName)).WithTypeParameterList(TypeParameterList());
m = m.WithModifiers(F.TokenList(F.Token(SyntaxKind.PublicKeyword)));
var keyCreation = F.LocalDeclarationStatement(F.VariableDeclaration(F.IdentifierName("var")).WithVariables(F.SingletonSeparatedList(F
.VariableDeclarator(F.Identifier("key")).WithInitializer(F.EqualsValueClause(TypesOfTypeParameters())))));
var mockCreation = F.SimpleLambdaExpression(F.Parameter(F.Identifier("keyString")), F.ObjectCreationExpression(MockMemberType)
.WithExpressionsAsArgumentList(
F.ThisExpression(),
F.LiteralExpression(SyntaxKind.StringLiteralExpression, F.Literal(ClassSymbol.Name)),
F.LiteralExpression(SyntaxKind.StringLiteralExpression, F.Literal(InterfaceSymbol.Name)),
F.BinaryExpression(SyntaxKind.AddExpression, F.LiteralExpression(SyntaxKind.StringLiteralExpression, F.Literal(Symbol.Name)),
F.IdentifierName("keyString")),
F.BinaryExpression(SyntaxKind.AddExpression,
F.BinaryExpression(SyntaxKind.AddExpression,
F.LiteralExpression(SyntaxKind.StringLiteralExpression, F.Literal(MemberMockName)), F.IdentifierName("keyString")),
F.LiteralExpression(
SyntaxKind.StringLiteralExpression,
F.Literal("()"))),
StrictnessExpression()
));
var returnStatement = F.ReturnStatement(F.CastExpression(MockMemberType, F.InvocationExpression(
F.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression, F.IdentifierName(MockProviderName),
F.IdentifierName("GetOrAdd")))
.WithArgumentList(
F.ArgumentList(F.SeparatedList(new[] { F.Argument(F.IdentifierName("key")), F.Argument(mockCreation) })))));
m = m.WithBody(F.Block(keyCreation, returnStatement));
var constraints = TypesForSymbols.AsConstraintClauses(Symbol.TypeParameters);
if (constraints.Any())
{
m = m.AddConstraintClauses(constraints);
}
return(m);
}
public ExpressionSyntax VisitExpression(ExpressionSyntax node)
{
if (node is BinaryExpressionSyntax binaryExpression)
{
var left = VisitExpression(binaryExpression.Left);
var right = VisitExpression(binaryExpression.Right);
return(SF.BinaryExpression(node.Kind(), left, right));
}
if (node is IdentifierNameSyntax identifierName)
{
return(SMS.Variables[identifierName.Identifier.Text]);
}
if (node is CastExpressionSyntax castExpression)
{
return(SF.CastExpression(castExpression.Type, VisitExpression(castExpression.Expression)));
}
if (node is InvocationExpressionSyntax invocationExpression)
{
var arguments = SF.ArgumentList();
foreach (var a in invocationExpression.ArgumentList.Arguments)
{
arguments = arguments.AddArguments(VisitArgument(a));
}
return(SF.InvocationExpression(invocationExpression.Expression, arguments));
}
if (node is PrefixUnaryExpressionSyntax prefixUnaryExpression)
{
return(SF.PrefixUnaryExpression(node.Kind(), VisitExpression(prefixUnaryExpression.Operand)));
}
if (node is ParenthesizedExpressionSyntax parenthesizedExpressionSyntax)
{
return(SF.ParenthesizedExpression(VisitExpression(parenthesizedExpressionSyntax.Expression)));
}
if (node is LiteralExpressionSyntax ||
node is MemberAccessExpressionSyntax)
{
return(node);
}
throw new NotImplementedException(node.GetType().Name);
}
public override SyntaxList <StatementSyntax> VisitAssignmentStatement(VBSyntax.AssignmentStatementSyntax node)
{
var lhs = (ExpressionSyntax)node.Left.Accept(_nodesVisitor);
var rhs = (ExpressionSyntax)node.Right.Accept(_nodesVisitor);
// e.g. VB DivideAssignmentExpression "/=" is always on doubles unless you use the "\=" IntegerDivideAssignmentExpression, so need to cast in C#
// Need the unconverted type, since the whole point is that it gets converted to a double by the operator
if (node.IsKind(VBasic.SyntaxKind.DivideAssignmentStatement) && !node.HasOperandOfUnconvertedType("System.Double", _semanticModel))
{
var doubleType = SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.DoubleKeyword));
rhs = SyntaxFactory.CastExpression(doubleType, rhs);
}
if (node.IsKind(VBasic.SyntaxKind.ExponentiateAssignmentStatement))
{
rhs = SyntaxFactory.InvocationExpression(
SyntaxFactory.ParseExpression($"{nameof(Math)}.{nameof(Math.Pow)}"),
ExpressionSyntaxExtensions.CreateArgList(lhs, rhs));
}
var kind = node.Kind().ConvertToken(TokenContext.Local);
return(SingleStatement(SyntaxFactory.AssignmentExpression(kind, lhs, rhs)));
}
/// <summary>
/// Returns syntax for the static fields of the serializer class.
/// </summary>
/// <param name="fields">The fields.</param>
/// <returns>Syntax for the static fields of the serializer class.</returns>
private static MemberDeclarationSyntax[] GenerateStaticFields(List <FieldInfoMember> fields)
{
var result = new List <MemberDeclarationSyntax>();
// ReSharper disable once ReturnValueOfPureMethodIsNotUsed
Expression <Action <TypeInfo> > getField = _ => _.GetField(string.Empty, BindingFlags.Default);
Expression <Action <Type> > getTypeInfo = _ => _.GetTypeInfo();
Expression <Action> getGetter = () => SerializationManager.GetGetter(default(FieldInfo));
Expression <Action> getReferenceSetter = () => SerializationManager.GetReferenceSetter(default(FieldInfo));
Expression <Action> getValueSetter = () => SerializationManager.GetValueSetter(default(FieldInfo));
// Expressions for specifying binding flags.
var bindingFlags = SyntaxFactoryExtensions.GetBindingFlagsParenthesizedExpressionSyntax(
SyntaxKind.BitwiseOrExpression,
BindingFlags.Instance,
BindingFlags.NonPublic,
BindingFlags.Public);
// Add each field and initialize it.
foreach (var field in fields)
{
var fieldInfo =
getField.Invoke(getTypeInfo.Invoke(SF.TypeOfExpression(field.FieldInfo.DeclaringType.GetTypeSyntax())))
.AddArgumentListArguments(
SF.Argument(field.FieldInfo.Name.GetLiteralExpression()),
SF.Argument(bindingFlags));
var fieldInfoVariable =
SF.VariableDeclarator(field.InfoFieldName).WithInitializer(SF.EqualsValueClause(fieldInfo));
var fieldInfoField = SF.IdentifierName(field.InfoFieldName);
if (!field.IsGettableProperty || !field.IsSettableProperty)
{
result.Add(
SF.FieldDeclaration(
SF.VariableDeclaration(typeof(FieldInfo).GetTypeSyntax()).AddVariables(fieldInfoVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
// Declare the getter for this field.
if (!field.IsGettableProperty)
{
var getterType =
typeof(Func <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var fieldGetterVariable =
SF.VariableDeclarator(field.GetterFieldName)
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(
getterType,
getGetter.Invoke().AddArgumentListArguments(SF.Argument(fieldInfoField)))));
result.Add(
SF.FieldDeclaration(SF.VariableDeclaration(getterType).AddVariables(fieldGetterVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
if (!field.IsSettableProperty)
{
if (field.FieldInfo.DeclaringType != null && field.FieldInfo.DeclaringType.IsValueType)
{
var setterType =
typeof(SerializationManager.ValueTypeSetter <,>).MakeGenericType(
field.FieldInfo.DeclaringType,
field.FieldInfo.FieldType).GetTypeSyntax();
var fieldSetterVariable =
SF.VariableDeclarator(field.SetterFieldName)
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(
setterType,
getValueSetter.Invoke()
.AddArgumentListArguments(SF.Argument(fieldInfoField)))));
result.Add(
SF.FieldDeclaration(SF.VariableDeclaration(setterType).AddVariables(fieldSetterVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
else
{
var setterType =
typeof(Action <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var fieldSetterVariable =
SF.VariableDeclarator(field.SetterFieldName)
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(
setterType,
getReferenceSetter.Invoke()
.AddArgumentListArguments(SF.Argument(fieldInfoField)))));
result.Add(
SF.FieldDeclaration(SF.VariableDeclaration(setterType).AddVariables(fieldSetterVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
}
}
return(result.ToArray());
}
/// <summary>
/// Returns syntax for the deep copier method.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="fields">The fields.</param>
/// <returns>Syntax for the deep copier method.</returns>
private static MemberDeclarationSyntax GenerateDeepCopierMethod(Type type, List <FieldInfoMember> fields)
{
var originalVariable = SF.IdentifierName("original");
var inputVariable = SF.IdentifierName("input");
var resultVariable = SF.IdentifierName("result");
var body = new List <StatementSyntax>();
if (type.GetCustomAttribute <ImmutableAttribute>() != null)
{
// Immutable types do not require copying.
body.Add(SF.ReturnStatement(originalVariable));
}
else
{
body.Add(
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("input")
.WithInitializer(
SF.EqualsValueClause(
SF.ParenthesizedExpression(
SF.CastExpression(type.GetTypeSyntax(), originalVariable)))))));
body.Add(
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("result")
.WithInitializer(SF.EqualsValueClause(GetObjectCreationExpressionSyntax(type))))));
// Copy all members from the input to the result.
foreach (var field in fields)
{
body.Add(SF.ExpressionStatement(field.GetSetter(resultVariable, field.GetGetter(inputVariable))));
}
// Record this serialization.
Expression <Action> recordObject =
() => SerializationContext.Current.RecordObject(default(object), default(object));
var currentSerializationContext =
SyntaxFactory.AliasQualifiedName(
SF.IdentifierName(SF.Token(SyntaxKind.GlobalKeyword)),
SF.IdentifierName("Orleans"))
.Qualify("Serialization")
.Qualify("SerializationContext")
.Qualify("Current");
body.Add(
SF.ExpressionStatement(
recordObject.Invoke(currentSerializationContext)
.AddArgumentListArguments(SF.Argument(originalVariable), SF.Argument(resultVariable))));
body.Add(SF.ReturnStatement(resultVariable));
}
return
(SF.MethodDeclaration(typeof(object).GetTypeSyntax(), "DeepCopier")
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword), SF.Token(SyntaxKind.StaticKeyword))
.AddParameterListParameters(
SF.Parameter(SF.Identifier("original")).WithType(typeof(object).GetTypeSyntax()))
.AddBodyStatements(body.ToArray())
.AddAttributeLists(
SF.AttributeList().AddAttributes(SF.Attribute(typeof(CopierMethodAttribute).GetNameSyntax()))));
}
/// <summary>
/// Returns syntax for initializing a new instance of the provided type.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>Syntax for initializing a new instance of the provided type.</returns>
private static ExpressionSyntax GetObjectCreationExpressionSyntax(Type type)
{
ExpressionSyntax result;
var typeInfo = type.GetTypeInfo();
if (typeInfo.IsValueType)
{
// Use the default value.
result = SF.DefaultExpression(typeInfo.GetTypeSyntax());
}
else if (type.GetConstructor(Type.EmptyTypes) != null)
{
// Use the default constructor.
result = SF.ObjectCreationExpression(typeInfo.GetTypeSyntax()).AddArgumentListArguments();
}
else
{
// Create an unformatted object.
#if DNXCORE50
var bindingFlags = SyntaxFactoryExtensions.GetBindingFlagsParenthesizedExpressionSyntax(
SyntaxKind.BitwiseOrExpression,
BindingFlags.Instance,
BindingFlags.NonPublic,
BindingFlags.Public);
var nullLiteralExpressionArgument = SF.Argument(SF.LiteralExpression(SyntaxKind.NullLiteralExpression));
var typeArg = SF.Argument(SF.TypeOfExpression(typeInfo.GetTypeSyntax()));
var bindingFlagsArg = SF.Argument(bindingFlags);
var binderArg = nullLiteralExpressionArgument;
ArgumentSyntax ctorArgumentsArg;
var cons = typeInfo.GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
.OrderBy(p => p.GetParameters().Count()).FirstOrDefault();
var consParameters = cons != null?cons.GetParameters().Select(p => p.ParameterType).ToArray() : null;
if (consParameters != null && consParameters.Length > 0)
{
var separatedSyntaxList = new SeparatedSyntaxList <ExpressionSyntax>();
separatedSyntaxList = consParameters
.Aggregate(separatedSyntaxList, (current, t) => current.Add(SF.DefaultExpression(t.GetTypeInfo().GetTypeSyntax())));
ctorArgumentsArg = SF.Argument(separatedSyntaxList.GetArrayCreationWithInitializerSyntax(
SF.PredefinedType(SF.Token(SyntaxKind.ObjectKeyword))));
}
else
{
ctorArgumentsArg = nullLiteralExpressionArgument;
}
var cultureInfoArg = SF.Argument(
SF.IdentifierName("System").Member("Globalization").Member("CultureInfo").Member("InvariantCulture"));
var createInstanceArguments = new []
{
typeArg,
bindingFlagsArg,
binderArg,
ctorArgumentsArg,
cultureInfoArg
};
Expression <Func <object> > getUninitializedObject = () => Activator.CreateInstance(
default(Type),
BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public,
null,
null,
System.Globalization.CultureInfo.InvariantCulture);
result = SF.CastExpression(
type.GetTypeSyntax(),
getUninitializedObject.Invoke()
.AddArgumentListArguments(createInstanceArguments));
#else
Expression <Func <object> > getUninitializedObject =
() => FormatterServices.GetUninitializedObject(default(Type));
result = SF.CastExpression(
type.GetTypeSyntax(),
getUninitializedObject.Invoke()
.AddArgumentListArguments(
SF.Argument(SF.TypeOfExpression(typeInfo.GetTypeSyntax()))));
#endif
}
return(result);
}
/// <summary>
/// Generates syntax to invoke a method on a grain.
/// </summary>
/// <param name="grainType">
/// The grain type.
/// </param>
/// <param name="grain">
/// The grain instance expression.
/// </param>
/// <param name="method">
/// The method.
/// </param>
/// <param name="arguments">
/// The arguments expression.
/// </param>
/// <returns>
/// Syntax to invoke a method on a grain.
/// </returns>
private static StatementSyntax[] GenerateInvokeForMethod(
Type grainType,
IdentifierNameSyntax grain,
MethodInfo method,
ExpressionSyntax arguments)
{
var castGrain = SF.ParenthesizedExpression(SF.CastExpression(grainType.GetTypeSyntax(), grain));
// Construct expressions to retrieve each of the method's parameters.
var parameters = new List <ExpressionSyntax>();
var methodParameters = method.GetParameters().ToList();
for (var i = 0; i < methodParameters.Count; i++)
{
var parameter = methodParameters[i];
var parameterType = parameter.ParameterType.GetTypeSyntax();
var indexArg = SF.Argument(SF.LiteralExpression(SyntaxKind.NumericLiteralExpression, SF.Literal(i)));
var arg = SF.CastExpression(
parameterType,
SF.ElementAccessExpression(arguments).AddArgumentListArguments(indexArg));
parameters.Add(arg);
}
// If the method is a generic method definition, use the generic method invoker field to invoke the method.
if (method.IsGenericMethodDefinition)
{
var invokerFieldName = GetGenericMethodInvokerFieldName(method);
var invokerCall = SF.InvocationExpression(
SF.IdentifierName(invokerFieldName)
.Member((GenericMethodInvoker invoker) => invoker.Invoke(null, null)))
.AddArgumentListArguments(SF.Argument(grain), SF.Argument(arguments));
return(new StatementSyntax[] { SF.ReturnStatement(SF.AwaitExpression(invokerCall)) });
}
// Invoke the method.
var grainMethodCall =
SF.InvocationExpression(castGrain.Member(method.Name))
.AddArgumentListArguments(parameters.Select(SF.Argument).ToArray());
// For void methods, invoke the method and return null.
if (method.ReturnType == typeof(void))
{
return(new StatementSyntax[]
{
SF.ExpressionStatement(grainMethodCall),
SF.ReturnStatement(SF.LiteralExpression(SyntaxKind.NullLiteralExpression))
});
}
// For methods which return non-generic Task, await the method and return null.
if (method.ReturnType == typeof(Task))
{
return(new StatementSyntax[]
{
SF.ExpressionStatement(SF.AwaitExpression(grainMethodCall)),
SF.ReturnStatement(SF.LiteralExpression(SyntaxKind.NullLiteralExpression))
});
}
return(new StatementSyntax[]
{
SF.ReturnStatement(SF.AwaitExpression(grainMethodCall))
});
}
/// <summary>
/// Returns syntax for the deep copier method.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="fields">The fields.</param>
/// <returns>Syntax for the deep copier method.</returns>
private static MemberDeclarationSyntax GenerateDeepCopierMethod(Type type, List <FieldInfoMember> fields)
{
var originalVariable = SF.IdentifierName("original");
var inputVariable = SF.IdentifierName("input");
var resultVariable = SF.IdentifierName("result");
var body = new List <StatementSyntax>();
if (type.GetTypeInfo().GetCustomAttribute <ImmutableAttribute>() != null)
{
// Immutable types do not require copying.
var typeName = type.GetParseableName(new TypeFormattingOptions(includeGlobal: false));
var comment = SF.Comment($"// No deep copy required since {typeName} is marked with the [Immutable] attribute.");
body.Add(SF.ReturnStatement(originalVariable).WithLeadingTrivia(comment));
}
else
{
body.Add(
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("input")
.WithInitializer(
SF.EqualsValueClause(
SF.ParenthesizedExpression(
SF.CastExpression(type.GetTypeSyntax(), originalVariable)))))));
body.Add(
SF.LocalDeclarationStatement(
SF.VariableDeclaration(type.GetTypeSyntax())
.AddVariables(
SF.VariableDeclarator("result")
.WithInitializer(SF.EqualsValueClause(GetObjectCreationExpressionSyntax(type))))));
// Record this serialization.
Expression <Action <ICopyContext> > recordObject =
ctx => ctx.RecordCopy(default(object), default(object));
var context = SF.IdentifierName("context");
body.Add(
SF.ExpressionStatement(
recordObject.Invoke(context)
.AddArgumentListArguments(SF.Argument(originalVariable), SF.Argument(resultVariable))));
// Copy all members from the input to the result.
foreach (var field in fields)
{
body.Add(SF.ExpressionStatement(field.GetSetter(resultVariable, field.GetGetter(inputVariable, context))));
}
body.Add(SF.ReturnStatement(resultVariable));
}
return
(SF.MethodDeclaration(typeof(object).GetTypeSyntax(), "DeepCopier")
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword), SF.Token(SyntaxKind.StaticKeyword))
.AddParameterListParameters(
SF.Parameter(SF.Identifier("original")).WithType(typeof(object).GetTypeSyntax()),
SF.Parameter(SF.Identifier("context")).WithType(typeof(ICopyContext).GetTypeSyntax()))
.AddBodyStatements(body.ToArray())
.AddAttributeLists(
SF.AttributeList().AddAttributes(SF.Attribute(typeof(CopierMethodAttribute).GetNameSyntax()))));
}
private static MemberDeclarationSyntax GenerateConstructor(string className, List <FieldInfoMember> fields)
{
var body = new List <StatementSyntax>();
Expression <Action <TypeInfo> > getField = _ => _.GetField(string.Empty, BindingFlags.Default);
Expression <Action <Type> > getTypeInfo = _ => _.GetTypeInfo();
Expression <Action <IFieldUtils> > getGetter = _ => _.GetGetter(default(FieldInfo));
Expression <Action <IFieldUtils> > getReferenceSetter = _ => _.GetReferenceSetter(default(FieldInfo));
Expression <Action <IFieldUtils> > getValueSetter = _ => _.GetValueSetter(default(FieldInfo));
// Expressions for specifying binding flags.
var bindingFlags = SyntaxFactoryExtensions.GetBindingFlagsParenthesizedExpressionSyntax(
SyntaxKind.BitwiseOrExpression,
BindingFlags.Instance,
BindingFlags.NonPublic,
BindingFlags.Public);
var fieldUtils = SF.IdentifierName("fieldUtils");
foreach (var field in fields)
{
// Get the field
var fieldInfoField = SF.IdentifierName(field.InfoFieldName);
var fieldInfo =
getField.Invoke(getTypeInfo.Invoke(SF.TypeOfExpression(field.FieldInfo.DeclaringType.GetTypeSyntax())))
.AddArgumentListArguments(
SF.Argument(field.FieldInfo.Name.GetLiteralExpression()),
SF.Argument(bindingFlags));
var fieldInfoVariable =
SF.VariableDeclarator(field.InfoFieldName).WithInitializer(SF.EqualsValueClause(fieldInfo));
if (!field.IsGettableProperty || !field.IsSettableProperty)
{
body.Add(SF.LocalDeclarationStatement(
SF.VariableDeclaration(typeof(FieldInfo).GetTypeSyntax()).AddVariables(fieldInfoVariable)));
}
// Set the getter/setter of the field
if (!field.IsGettableProperty)
{
var getterType =
typeof(Func <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var getterInvoke = SF.CastExpression(
getterType,
getGetter.Invoke(fieldUtils).AddArgumentListArguments(SF.Argument(fieldInfoField)));
body.Add(SF.ExpressionStatement(
SF.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SF.IdentifierName(field.GetterFieldName), getterInvoke)));
}
if (!field.IsSettableProperty)
{
if (field.FieldInfo.DeclaringType != null && field.FieldInfo.DeclaringType.GetTypeInfo().IsValueType)
{
var setterType =
typeof(ValueTypeSetter <,>).MakeGenericType(
field.FieldInfo.DeclaringType,
field.FieldInfo.FieldType).GetTypeSyntax();
var getValueSetterInvoke = SF.CastExpression(
setterType,
getValueSetter.Invoke(fieldUtils)
.AddArgumentListArguments(SF.Argument(fieldInfoField)));
body.Add(SF.ExpressionStatement(
SF.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SF.IdentifierName(field.SetterFieldName), getValueSetterInvoke)));
}
else
{
var setterType =
typeof(Action <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var getReferenceSetterInvoke = SF.CastExpression(
setterType,
getReferenceSetter.Invoke(fieldUtils)
.AddArgumentListArguments(SF.Argument(fieldInfoField)));
body.Add(SF.ExpressionStatement(
SF.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SF.IdentifierName(field.SetterFieldName), getReferenceSetterInvoke)));
}
}
}
return
(SF.ConstructorDeclaration(className)
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword))
.AddParameterListParameters(
SF.Parameter(fieldUtils.Identifier).WithType(typeof(IFieldUtils).GetTypeSyntax()))
.AddBodyStatements(body.ToArray()));
}
/// <summary>
/// Generates syntax to invoke a method on a grain.
/// </summary>
/// <param name="grainType">
/// The grain type.
/// </param>
/// <param name="grain">
/// The grain instance expression.
/// </param>
/// <param name="method">
/// The method.
/// </param>
/// <param name="arguments">
/// The arguments expression.
/// </param>
/// <returns>
/// Syntax to invoke a method on a grain.
/// </returns>
private static StatementSyntax[] GenerateInvokeForMethod(
Type grainType,
IdentifierNameSyntax grain,
MethodInfo method,
ExpressionSyntax arguments)
{
var castGrain = SF.ParenthesizedExpression(SF.CastExpression(grainType.GetTypeSyntax(), grain));
// Construct expressions to retrieve each of the method's parameters.
var parameters = new List <ExpressionSyntax>();
var methodParameters = method.GetParameters().ToList();
for (var i = 0; i < methodParameters.Count; i++)
{
var parameter = methodParameters[i];
var parameterType = parameter.ParameterType.GetTypeSyntax();
var indexArg = SF.Argument(SF.LiteralExpression(SyntaxKind.NumericLiteralExpression, SF.Literal(i)));
var arg = SF.CastExpression(
parameterType,
SF.ElementAccessExpression(arguments).AddArgumentListArguments(indexArg));
parameters.Add(arg);
}
// If the method is a generic method definition, use the generic method invoker field to invoke the method.
if (method.IsGenericMethodDefinition)
{
var invokerFieldName = GetGenericMethodInvokerFieldName(method);
var invokerCall = SF.InvocationExpression(
SF.IdentifierName(invokerFieldName)
.Member((GenericMethodInvoker invoker) => invoker.Invoke(null, null)))
.AddArgumentListArguments(SF.Argument(grain), SF.Argument(arguments));
return(new StatementSyntax[] { SF.ReturnStatement(SF.AwaitExpression(invokerCall)) });
}
// Invoke the method.
var grainMethodCall =
SF.InvocationExpression(castGrain.Member(method.Name))
.AddArgumentListArguments(parameters.Select(SF.Argument).ToArray());
// For void methods, invoke the method and return null.
if (method.ReturnType == typeof(void))
{
return(new StatementSyntax[]
{
SF.ExpressionStatement(grainMethodCall),
SF.ReturnStatement(SF.LiteralExpression(SyntaxKind.NullLiteralExpression))
});
}
// For methods which return non-generic Task, await the method and return null.
if (method.ReturnType == typeof(Task))
{
return(new StatementSyntax[]
{
SF.ExpressionStatement(SF.AwaitExpression(grainMethodCall)),
SF.ReturnStatement(SF.LiteralExpression(SyntaxKind.NullLiteralExpression))
});
}
if (method.ReturnType.IsGenericType &&
method.ReturnType.GetGenericTypeDefinition().FullName == "System.Threading.Tasks.ValueTask`1")
{
var convertToTaskResult = SF.IdentifierName("AsTask");
// Converting ValueTask method result to Task since "Invoke" method should return Task.
// Temporary solution. Need to change when Orleans will be using ValueTask instead of Task.
grainMethodCall =
SF.InvocationExpression(
SF.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
SF.ExpressionStatement(grainMethodCall).Expression, convertToTaskResult));
}
return(new StatementSyntax[]
{
SF.ReturnStatement(SF.AwaitExpression(grainMethodCall))
});
}
