public override Expression CoerceAnonymousNestedFunction(AnonymousNestedFunction func, TypeNode targetType, bool explicitCoercion, TypeViewer typeViewer)
{
if (func is AnonymousNestedDelegate && !(targetType is DelegateNode))
{
this.HandleError(func, Error.AnonMethToNonDel, this.GetTypeName(targetType));
return(null);
}
return(base.CoerceAnonymousNestedFunction(func, targetType, explicitCoercion, typeViewer));
}
// TODO: Remove this? There shouldn't be any ANFs that need to be serialized in a contract
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction anf)
{
// we can serialize an ANF only if it is really just a wrapper around a comprehension
// in that case, just serialize the comprehension and let the deserializer
// reconstruct the ANF.
if (anf == null)
{
return(null);
}
if (anf.Body == null)
{
return(anf);
}
if (anf.Body.Statements == null)
{
return(anf);
}
if (anf.Body.Statements.Count != 1)
{
return(anf);
}
ExpressionStatement es = anf.Body.Statements[0] as ExpressionStatement;
if (es == null)
{
return(anf);
}
Comprehension q = es.Expression as Comprehension;
if (q == null)
{
return(anf);
}
this.VisitComprehension(q);
return(anf);
}
public virtual Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func, AnonymousNestedFunction changes, AnonymousNestedFunction deletions, AnonymousNestedFunction insertions){
this.UpdateSourceContext(func, changes);
if (func == null) return changes;
if (changes != null){
if (deletions == null || insertions == null)
Debug.Assert(false);
else{
func.Body = this.VisitBlock(func.Body, changes.Body, deletions.Body, insertions.Body);
func.Parameters = this.VisitParameterList(func.Parameters, changes.Parameters, deletions.Parameters, insertions.Parameters);
}
}else if (deletions != null)
return null;
return func;
}
public virtual Differences VisitAnonymousNestedFunction(AnonymousNestedFunction/*!*/ func1, AnonymousNestedFunction func2) {
Differences differences = new Differences(func1, func2);
if (func1 == null || func2 == null){
if (func1 != func2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
AnonymousNestedFunction changes = (AnonymousNestedFunction)func2.Clone();
AnonymousNestedFunction deletions = (AnonymousNestedFunction)func2.Clone();
AnonymousNestedFunction insertions = (AnonymousNestedFunction)func2.Clone();
Differences diff = this.VisitBlock(func1.Body, func2.Body);
if (diff == null){Debug.Assert(false); return differences;}
changes.Body = diff.Changes as Block;
deletions.Body = diff.Deletions as Block;
insertions.Body = diff.Insertions as Block;
Debug.Assert(diff.Changes == changes.Body && diff.Deletions == deletions.Body && diff.Insertions == insertions.Body);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
ParameterList parChanges, parDeletions, parInsertions;
diff = this.VisitParameterList(func1.Parameters, func2.Parameters, out parChanges, out parDeletions, out parInsertions);
if (diff == null){Debug.Assert(false); return differences;}
changes.Parameters = parChanges;
deletions.Parameters = parDeletions;
insertions.Parameters = parInsertions;
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
if (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}
public virtual Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func){
if (func == null) return null;
func.Parameters = this.VisitParameterList(func.Parameters);
func.Body = this.VisitBlock(func.Body);
return func;
}
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func) {
if (func == null) return null;
func.Method = this.VisitMethod(func.Method);
return func;
}
public virtual void FillInImplicitType(AnonymousNestedFunction anonFunc, DelegateNode delegateNode) {
if (anonFunc == null || delegateNode == null) return;
ParameterList afParams = anonFunc.Parameters;
ParameterList delParams = delegateNode.Parameters;
if (afParams == null || delParams == null || afParams.Count != delParams.Count) return;
for (int i = 0, n = afParams.Count; i < n; i++) {
Parameter p = afParams[i];
if (p == null || p.Type != null) continue;
Parameter q = delParams[i];
if (q != null) p.Type = q.Type;
}
}
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func){
if (func == null) return null;
Method meth = func.Method = this.VisitMethod(func.Method);
if (meth == null || meth.DeclaringType == null) return null;
if (meth.Scope != null) {
meth.Scope.ThisTypeInstance = meth.DeclaringType;
#if WHIDBEY
if (meth.DeclaringType is ClosureClass) {
TypeNodeList tpars = meth.DeclaringType.ConsolidatedTemplateParameters;
if (tpars != null && tpars.Count > 0) {
//Create a "fake" dummy instance. Using the real template instantiation code will not work
//because the closure class has not yet been added to the members of its declaring type.
TypeNode tinst = (TypeNode)meth.DeclaringType.Clone();
tinst.Template = meth.DeclaringType;
meth.Scope.ThisTypeInstance = tinst;
}
}
#endif
}
if (meth.ReturnType == null){
//No return type inferred for function. This happens when no return or yield were encountered, or when no return has a value.
this.InferReturnTypeForExpressionFunction(meth);
}
func.Type = FunctionType.For(meth.ReturnType, meth.Parameters, this.currentType);
//TODO: find all places where control leaves the function after an expression statement and insert return statements
return func;
}
public virtual void VisitAnonymousNestedFunction(AnonymousNestedFunction func)
{
if (func == null) return;
this.VisitParameterList(func.Parameters);
this.VisitBlock(func.Body);
}
public virtual Expression CoerceAnonymousNestedFunction(AnonymousNestedFunction func, TypeNode targetType, bool explicitCoercion, TypeViewer typeViewer) {
if (func.Invocation != null){
Debug.Assert(!explicitCoercion);
if (func.Type != targetType && this.ImplicitCoercionFromTo(func.Invocation.Type, targetType)){
func.Type = targetType;
func.Invocation = this.ImplicitCoercion(func.Invocation, targetType, typeViewer);
}
return func;
}
DelegateNode targetDType = targetType as DelegateNode;
if (targetDType != null) {
//TODO: if func is nested in a generic method and delegate is generic instance
Method meth = func.Method;
if (meth == null) return null;
//We wrap each return expression of the anonymous method with an implicit
//coercion
if (TypeNode.StripModifiers(meth.ReturnType) != TypeNode.StripModifiers(targetDType.ReturnType)) {
if (this.ImplicitCoercionFromTo(meth.ReturnType, targetDType.ReturnType)) {
func.Type = targetType;
meth.ReturnType = targetDType.ReturnType;
meth.Body = ImplicitCoercionReturnExp(meth.Body, targetDType.ReturnType);
}
else {
this.HandleError(func, Error.NestedFunctionDelegateReturnTypeMismatch, this.GetTypeName(targetDType));
return func;
}
}
if (func.Parameters == null && targetDType.Parameters != null) {
ParameterList parameters = meth.Parameters = targetDType.Parameters.Clone();
for (int i = 0, n = parameters.Count; i < n; i++) {
Parameter par = parameters[i];
if (par == null) continue;
if (par.IsOut || (par.Type != null && par.Type is Reference)) {
this.HandleError(func, Error.NestedFunctionDelegateParameterMismatchBecauseOfOutParameter, this.GetTypeName(targetDType));
return func;
}
parameters[i] = par = (Parameter)par.Clone();
par.DeclaringMethod = meth;
}
}
else {
ParameterList savedMethodParams = meth.Parameters;
meth.Parameters = func.Parameters;
if (!meth.ParametersMatch(targetDType.Parameters)) {
this.HandleError(func, Error.NestedFunctionDelegateParameterMismatch, this.GetTypeName(targetDType));
return func;
}
meth.Parameters = savedMethodParams;
}
InstanceInitializer dcons = TypeViewer.GetTypeView(typeViewer, targetType).GetConstructor(SystemTypes.Object, SystemTypes.IntPtr);
if (dcons == null) return func;
MemberBinding memb = new MemberBinding(null, meth);
memb.Type = null;
Expression ldftn = new UnaryExpression(memb, NodeType.Ldftn);
ldftn.Type = SystemTypes.IntPtr;
ExpressionList arguments = new ExpressionList(2);
if (meth.IsStatic)
arguments.Add(Literal.Null);
else
arguments.Add(new CurrentClosure(meth, meth.DeclaringType));
arguments.Add(ldftn);
Construct cons = new Construct(new MemberBinding(null, dcons), arguments, targetType);
cons.SourceContext = func.SourceContext;
func.Invocation = cons;
func.Type = targetType;
return func;
}
else {
Method invoker = func.Method;
if (invoker != null && (invoker.Parameters == null || invoker.Parameters.Count == 0)) {
Expression ob = invoker.IsStatic ? null : new CurrentClosure(invoker, invoker.DeclaringType);
Expression call = new MethodCall(new MemberBinding(ob, invoker), null, NodeType.Call, invoker.ReturnType, func.SourceContext);
if (explicitCoercion)
func.Invocation = this.ExplicitCoercion(call, targetType, typeViewer);
else
func.Invocation = this.ImplicitCoercion(call, targetType, typeViewer);
func.Type = targetType;
}
else {
func.Invocation = null;
Error e = explicitCoercion ? Error.NoExplicitCoercion : Error.NoImplicitCoercion;
FunctionType ftype = FunctionType.For(func.Method.ReturnType, func.Method.Parameters, this.currentType);
Node n = new Expression(NodeType.Nop);
n.SourceContext = invoker.Parameters[0].SourceContext;
n.SourceContext.EndPos = func.Body.SourceContext.EndPos;
this.HandleError(n, e, this.GetMemberSignature(ftype), this.GetTypeName(targetType));
}
return func;
}
}
// TODO: Remove this? There shouldn't be any ANFs that need to be serialized in a contract
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction anf) {
// we can serialize an ANF only if it is really just a wrapper around a comprehension
// in that case, just serialize the comprehension and let the deserializer
// reconstruct the ANF.
if (anf == null) return null;
if (anf.Body == null) return anf;
if (anf.Body.Statements == null) return anf;
if (anf.Body.Statements.Count != 1) return anf;
ExpressionStatement es = anf.Body.Statements[0] as ExpressionStatement;
if (es == null) return anf;
Comprehension q = es.Expression as Comprehension;
if (q == null) return anf;
this.VisitComprehension(q);
return anf;
}
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func)
{
if (func == null) return null;
AnonymousNestedFunction dup = (AnonymousNestedFunction)func.Clone();
if (func.Method != null)
{
dup.Method = this.VisitMethod(func.Method);
//^ assume dup.Method != null;
dup.Parameters = dup.Method.Parameters;
dup.Body = dup.Method.Body;
return dup;
}
return base.VisitAnonymousNestedFunction(dup);
}
public virtual Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func1, AnonymousNestedFunction func2)
{
if (func1 == null) return null;
if (func2 == null)
{
func1.Parameters = this.VisitParameterList(func1.Parameters, null);
func1.Body = this.VisitBlock(func1.Body, null);
}
else
{
func1.Parameters = this.VisitParameterList(func1.Parameters, func2.Parameters);
func1.Body = this.VisitBlock(func1.Body, func2.Body);
}
return func1;
}
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func){
if (func == null) return null;
Method method = func.Method;
if (method == null) return null;
TypeNode[] parameterTypes = null;
if (this.currentMethod != null && this.currentMethod.Scope != null) {
int paramCount = method.Parameters == null ? 0 : method.Parameters.Count;
parameterTypes = new TypeNode[paramCount];
method.ReturnType = this.currentMethod.Scope.FixTypeReference(method.ReturnType);
for (int i = 0; i < paramCount; i++) {
Parameter p = method.Parameters[i];
if (p == null) continue;
p.Type = this.currentMethod.Scope.FixTypeReference(p.Type);
parameterTypes[i] = p.Type;
}
}
Block block = method.Body;
StatementList statements = block == null ? null : block.Statements;
if (statements != null && statements.Count == 2 && statements[0] is ExpressionStatement && statements[1] is Return){
statements[0].SourceContext.Document = null;
if (method.Attributes == null) method.Attributes = new AttributeList(2);
method.Attributes.Add(new AttributeNode(new MemberBinding(null, SystemTypes.DebuggerHiddenAttribute.GetConstructor()), null));
method.Attributes.Add(new AttributeNode(new MemberBinding(null, SystemTypes.DebuggerStepThroughAttribute.GetConstructor()), null));
}
this.VisitMethod(method);
method.DeclaringType.Members.Add(method);
if (this.currentClosureLocal != null && this.currentClosureLocal.Type != null && this.currentClosureLocal.Type.Template != null) {
Construct cons = func.Invocation as Construct;
if (cons != null && cons.Operands != null && cons.Operands.Count >= 2) {
UnaryExpression ue = cons.Operands[1] as UnaryExpression;
if (ue != null) {
MemberBinding mb = ue.Operand as MemberBinding;
if (mb != null && mb.BoundMember == method) {
Method specializedMethod = (Method)mb.BoundMember.Clone();
specializedMethod.Parameters = specializedMethod.Parameters.Clone();
for (int i = 0, n = specializedMethod.Parameters.Count; i < n; i++) {
Parameter p = (Parameter)specializedMethod.Parameters[i].Clone();
p.DeclaringMethod = specializedMethod;
specializedMethod.Parameters[i] = p;
}
mb.BoundMember = specializedMethod;
specializedMethod.DeclaringType = this.currentClosureLocal.Type;
this.currentClosureLocal.Type.Members.Add(specializedMethod);
}
}
}
}
return this.VisitExpression(func.Invocation);
}
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func){
return func;
}
public override Expression VisitAnonymousNestedFunction(AnonymousNestedFunction func){
if (func == null) return null;
if (!(this.scope is BlockScope || this.scope is MethodScope)){
this.HandleError(func, Error.AnonymousNestedFunctionNotAllowed);
return null;
}
Method method = func.Method = new Method();
method.Name = Identifier.For("Function:"+func.UniqueKey);
this.ConstructMethodForNestedFunction(func, func.Method, null, func.Parameters, func.Body);
return func;
}