void FuncReturningFoo(SLType type, SLConstant val)
{
SLLine line = SLReturn.ReturnLine(val);
SLCodeBlock block = new SLCodeBlock(new ICodeElement [] { line });
SLFunc func = new SLFunc(Visibility.Public, type, new SLIdentifier("simpleFunc"), null, block);
string code = CodeWriter.WriteToString(func);
Compiler.CompileStringUsing(null, XCodeCompiler.SwiftcCustom, code, null);
}
static SLFunc MetadataFuncForType(PlatformName platform, TypeDefinition type, TypeType entityType)
{
var name = type.Name;
var moduleName = type.Namespace;
// typename based on C# type name, not remapped name
var funcID = new SLIdentifier(FuncIDForTypeDefinition(type));
TypeAggregator.RemapModuleAndName(platform, ref moduleName, ref name, entityType);
var value = new SLIdentifier($"{name}.self");
var returnLine = SLReturn.ReturnLine(value);
var body = new SLCodeBlock(null);
body.Add(returnLine);
var func = new SLFunc(Visibility.Public, new SLSimpleType("Any.Type"), funcID, null, body);
new SLComment(type.FullName, true).AttachBefore(func);
var attr = AvailableAttributeForType(platform, type);
if (attr != null)
{
attr.AttachBefore(func);
}
return(func);
}
public IEnumerable <ICodeElement> MarshalFunctionCall(FunctionDeclaration func, string vtableName, string vtableElementName)
{
preMarshalCode.Clear();
postMarshalCode.Clear();
ICodeElement returnLine = null;
var instanceEntity = typeMapper.GetEntityForTypeSpec(func.ParameterLists [0] [0].TypeSpec);
bool instanceIsProtocol = instanceEntity.EntityType == EntityType.Protocol;
// bool returnIsGeneric = func.ReturnTypeSpec != null && func.IsGenericType(func.ReturnTypeSpec);
SLIdentifier returnIdent = null;
if (func.ParameterLists.Count != 2)
{
throw new ArgumentException(String.Format("Method {0} is has {1} parameter lists - it should really have two (normal for an instance method).",
func.ToFullyQualifiedName(true), func.ParameterLists.Count));
}
var closureArgs = new List <SLBaseExpr> ();
// marshal the regular arguments
for (int i = 0; i < func.ParameterLists [1].Count; i++)
{
var parm = func.ParameterLists [1] [i];
var privateName = !String.IsNullOrEmpty(parm.PrivateName) ? parm.PrivateName : TypeSpecToSLType.ConjureIdentifier(null, i).Name;
if (func.IsTypeSpecGeneric(parm))
{
Tuple <int, int> depthIndex = func.GetGenericDepthAndIndex(parm.TypeSpec);
closureArgs.Add(MarshalGenericTypeSpec(func, privateName, parm.TypeSpec as NamedTypeSpec, depthIndex.Item1, depthIndex.Item2));
}
else
{
closureArgs.Add(MarshalTypeSpec(func, privateName, parm.TypeSpec));
}
}
string callName = String.Format("{0}.{1}", vtableName, vtableElementName);
var callInvocation = new SLPostBang(new SLIdentifier(callName), false);
if (instanceIsProtocol)
{
string protoName = MarshalEngine.Uniqueify("selfProto", identifiersUsed);
identifiersUsed.Add(protoName);
var selfProtoDecl = new SLDeclaration(false,
new SLBinding(protoName, new SLIdentifier("self"), new SLSimpleType(func.ParameterLists [0] [0].TypeName.NameWithoutModule())),
Visibility.None);
preMarshalCode.Add(new SLLine(selfProtoDecl));
closureArgs.Insert(0, new SLAddressOf(new SLIdentifier(protoName), false));
}
else
{
// add self as a parameter
imports.AddIfNotPresent("XamGlue");
closureArgs.Insert(0, new SLFunctionCall("toIntPtr", false, new SLArgument(new SLIdentifier("value"), new SLIdentifier("self"), true)));
}
string throwReturnName = null;
SLIdentifier throwReturn = null;
SLType throwReturnType = null;
throwReturnType = new SLTupleType(
new SLNameTypePair(SLParameterKind.None, "_", func.ReturnTypeSpec == null || func.ReturnTypeSpec.IsEmptyTuple ?
SLSimpleType.Void : typeMapper.TypeSpecMapper.MapType(func, imports, func.ReturnTypeSpec, true)),
new SLNameTypePair(SLParameterKind.None, "_", new SLSimpleType("Swift.Error")),
new SLNameTypePair(SLParameterKind.None, "_", new SLSimpleType("Bool")));
if (func.HasThrows)
{
throwReturnName = MarshalEngine.Uniqueify("retval", identifiersUsed);
identifiersUsed.Add(throwReturnName);
throwReturn = new SLIdentifier(throwReturnName);
imports.AddIfNotPresent("XamGlue");
// FIXME for generics
var throwReturnDecl = new SLDeclaration(true, new SLBinding(throwReturn,
new SLFunctionCall(String.Format("UnsafeMutablePointer<{0}>.allocate", throwReturnType.ToString()),
false, new SLArgument(new SLIdentifier("capacity"), SLConstant.Val(1), true))), Visibility.None);
closureArgs.Insert(0, new SLFunctionCall("toIntPtr", false, new SLArgument(new SLIdentifier("value"), throwReturn, true)));
preMarshalCode.Add(new SLLine(throwReturnDecl));
}
if (func.HasThrows)
{
returnLine = new SLLine(new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)));
string errName = MarshalEngine.Uniqueify("err", identifiersUsed);
identifiersUsed.Add(errName);
var errIdent = new SLIdentifier(errName);
var errDecl = new SLDeclaration(true, new SLBinding(errIdent, new SLFunctionCall("getExceptionThrown", false,
new SLArgument(new SLIdentifier("retval"), throwReturn, true))), Visibility.None);
postMarshalCode.Add(new SLLine(errDecl));
var ifblock = new SLCodeBlock(null);
SLCodeBlock elseblock = null;
ifblock.Add(SLFunctionCall.FunctionCallLine($"{throwReturnName}.deinitialize", new SLArgument(new SLIdentifier("count"), SLConstant.Val(1), true)));
ifblock.Add(SLFunctionCall.FunctionCallLine($"{throwReturnName}.deallocate"));
ifblock.Add(new SLLine(new SLThrow(new SLPostBang(errIdent, false))));
if (func.ReturnTypeSpec != null && !func.ReturnTypeSpec.IsEmptyTuple)
{
elseblock = new SLCodeBlock(null);
string retvalvalName = MarshalEngine.Uniqueify("retvalval", identifiersUsed);
identifiersUsed.Add(retvalvalName);
SLIdentifier retvalval = new SLIdentifier(retvalvalName);
string tuplecracker = "getExceptionNotThrown";
var retvalvaldecl =
new SLDeclaration(true, new SLBinding(retvalval,
new SLFunctionCall(tuplecracker, false,
new SLArgument(new SLIdentifier("retval"), throwReturn, true))), Visibility.None);
elseblock.Add(new SLLine(retvalvaldecl));
elseblock.Add(SLFunctionCall.FunctionCallLine($"{throwReturnName}.deallocate"));
ISLExpr returnExpr = new SLPostBang(retvalval, false);
elseblock.Add(SLReturn.ReturnLine(returnExpr));
}
postMarshalCode.Add(new SLIfElse(new SLBinaryExpr(BinaryOp.NotEqual, errIdent, SLConstant.Nil),
ifblock, elseblock));
}
else
{
if (func.ReturnTypeSpec == null || func.ReturnTypeSpec.IsEmptyTuple)
{
// On no return value
// _vtable.entry!(args)
//
returnLine = new SLLine(new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)));
}
else
{
if (TypeSpec.IsBuiltInValueType(func.ReturnTypeSpec))
{
// on simple return types (Int, UInt, Bool, etc)
// return _vtable.entry!(args)
//
var closureCall = new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs));
if (postMarshalCode.Count == 0)
{
returnLine = SLReturn.ReturnLine(closureCall);
}
else
{
returnIdent = new SLIdentifier(MarshalEngine.Uniqueify("retval", identifiersUsed));
identifiersUsed.Add(returnIdent.Name);
var retvalDecl = new SLDeclaration(true, returnIdent, null, closureCall, Visibility.None);
returnLine = new SLLine(retvalDecl);
postMarshalCode.Add(SLReturn.ReturnLine(returnIdent));
}
}
else
{
if (func.IsTypeSpecGeneric(func.ReturnTypeSpec))
{
imports.AddIfNotPresent("XamGlue");
// dealing with a generic here.
// UnsafeMutablePointer<T> retval = UnsafeMutablePointer<T>.alloc(1)
// someCall(toIntPtr(retval), ...)
// T actualRetval = retval.move()
// retval.dealloc(1)
// return actualRetval
returnIdent = new SLIdentifier(MarshalEngine.Uniqueify("retval", identifiersUsed));
identifiersUsed.Add(returnIdent.Name);
Tuple <int, int> depthIndex = func.GetGenericDepthAndIndex(func.ReturnTypeSpec);
var retvalDecl = new SLDeclaration(true, returnIdent, null,
new SLFunctionCall(String.Format("UnsafeMutablePointer<{0}>.allocate", SLGenericReferenceType.DefaultNamer(depthIndex.Item1, depthIndex.Item2)),
false, new SLArgument(new SLIdentifier("capacity"), SLConstant.Val(1), true)),
Visibility.None);
preMarshalCode.Add(new SLLine(retvalDecl));
closureArgs.Insert(0, new SLFunctionCall("toIntPtr", false, new SLArgument(new SLIdentifier("value"), returnIdent, true)));
SLIdentifier actualReturnIdent = new SLIdentifier(MarshalEngine.Uniqueify("actualRetval", identifiersUsed));
identifiersUsed.Add(actualReturnIdent.Name);
returnLine = new SLLine(new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)));
var actualRetvalDecl = new SLDeclaration(true, actualReturnIdent, null,
new SLFunctionCall(String.Format("{0}.move", returnIdent.Name), false),
Visibility.None);
postMarshalCode.Add(new SLLine(actualRetvalDecl));
postMarshalCode.Add(SLFunctionCall.FunctionCallLine(String.Format("{0}.deallocate", returnIdent.Name)));
postMarshalCode.Add(SLReturn.ReturnLine(actualReturnIdent));
}
else if (NamedSpecIsClass(func.ReturnTypeSpec as NamedTypeSpec))
{
// class (not struct or enum) return type is a pointer
// if we have no post marshal code:
// return fromIntPtr(_vtable.entry!(args))
// if we have post marshal code:
// let retval:returnType = fromIntPtr(_vtable.entry!(args))
// ... post marshal code
// return retval;
imports.AddIfNotPresent("XamGlue");
SLBaseExpr callExpr = new SLFunctionCall("fromIntPtr", false,
new SLArgument(new SLIdentifier("ptr"), new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)), true));
if (postMarshalCode.Count > 0)
{
string retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
var retDecl = new SLDeclaration(true, retvalName,
typeMapper.TypeSpecMapper.MapType(func, imports, func.ReturnTypeSpec, true), callExpr);
returnLine = new SLLine(retDecl);
postMarshalCode.Add(SLReturn.ReturnLine(new SLIdentifier(retvalName)));
}
else
{
returnLine = SLReturn.ReturnLine(callExpr);
}
}
else
{
var entity = typeMapper.GetEntityForTypeSpec(func.ReturnTypeSpec);
if (func.ReturnTypeSpec is NamedTypeSpec && entity == null)
{
throw new NotImplementedException($"Function {func.ToFullyQualifiedName (true)} has an unknown return type {func.ReturnTypeSpec.ToString ()}");
}
if (entity?.EntityType == EntityType.TrivialEnum)
{
imports.AddIfNotPresent(entity.Type.Module.Name);
var slSelf = new SLIdentifier($"{entity.Type.Name}.self");
SLBaseExpr callExpr = new SLFunctionCall("unsafeBitCast", false,
new SLArgument(new SLIdentifier("_"), new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)), false),
new SLArgument(new SLIdentifier("to"), slSelf, true));
if (postMarshalCode.Count == 0)
{
returnLine = SLReturn.ReturnLine(callExpr);
}
else
{
returnIdent = new SLIdentifier(MarshalEngine.Uniqueify("retval", identifiersUsed));
identifiersUsed.Add(returnIdent.Name);
var retvalDecl = new SLDeclaration(true, returnIdent, null, callExpr, Visibility.None);
returnLine = new SLLine(retvalDecl);
postMarshalCode.Add(SLReturn.ReturnLine(returnIdent));
}
}
else
{
switch (func.ReturnTypeSpec.Kind)
{
case TypeSpecKind.Closure:
// let retval:CT = allocSwiftClosureToFunc_ARGS ()
// _vtable.entry!(retval, args)
// let actualReturn = netFuncToSwiftClosure (retval.move())
// retval.deallocate()
// return actualReturn
var ct = func.ReturnTypeSpec as ClosureTypeSpec;
var slct = new SLBoundGenericType("UnsafeMutablePointer", ToMarshaledClosureType(func, ct));
var ptrName = MarshalEngine.Uniqueify("retval", identifiersUsed);
identifiersUsed.Add(ptrName);
var ptrAllocCallSite = ct.HasReturn() ? $"allocSwiftClosureToFunc_{ct.ArgumentCount()}" : $"allocSwiftClosureToAction_{ct.ArgumentCount ()}";
var ptrAllocCall = new SLFunctionCall(ptrAllocCallSite, false);
var ptrDecl = new SLDeclaration(true, new SLIdentifier(ptrName), slct, ptrAllocCall, Visibility.None);
preMarshalCode.Add(new SLLine(ptrDecl));
closureArgs.Insert(0, new SLIdentifier(ptrName));
returnLine = new SLLine(new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)));
var actualReturnName = MarshalEngine.Uniqueify("actualReturn", identifiersUsed);
identifiersUsed.Add(actualReturnName);
var convertCallSite = ct.HasReturn() ? "netFuncToSwiftClosure" : "netActionToSwiftClosure";
var isEmptyClosure = !ct.HasReturn() && !ct.HasArguments();
var pointerMove = new SLFunctionCall($"{ptrName}.move", false);
var convertCall = isEmptyClosure ? pointerMove : new SLFunctionCall(convertCallSite, false, new SLArgument(new SLIdentifier("a1"), pointerMove, true));
var actualDecl = new SLDeclaration(true, actualReturnName, value: convertCall, vis: Visibility.None);
postMarshalCode.Add(new SLLine(actualDecl));
postMarshalCode.Add(new SLReturn(new SLIdentifier(actualReturnName)));
break;
case TypeSpecKind.ProtocolList:
case TypeSpecKind.Tuple:
case TypeSpecKind.Named:
var namedReturn = func.ReturnTypeSpec as NamedTypeSpec;
// enums and structs can't get returned directly
// instead they will be inserted at the head of the argument list
// let retval = UnsafeMutablePointer<StructOrEnumType>.allocate(capacity: 1)
// _vtable.entry!(retval, args)
// T actualRetval = retval.move()
// retval.deallocate()
// return actualRetval
string allocCallSite = String.Format("UnsafeMutablePointer<{0}>.allocate", func.ReturnTypeName);
if (namedReturn != null)
{
imports.AddIfNotPresent(namedReturn.Module);
}
string retvalName = MarshalEngine.Uniqueify("retval", identifiersUsed);
identifiersUsed.Add(retvalName);
var retDecl = new SLDeclaration(true, retvalName,
null, new SLFunctionCall(allocCallSite, false, new SLArgument(new SLIdentifier("capacity"),
SLConstant.Val(1), true)), Visibility.None);
preMarshalCode.Add(new SLLine(retDecl));
closureArgs.Insert(0, new SLIdentifier(retvalName));
returnLine = new SLLine(new SLNamedClosureCall(callInvocation, new CommaListElementCollection <SLBaseExpr> (closureArgs)));
SLIdentifier actualReturnIdent = new SLIdentifier(MarshalEngine.Uniqueify("actualRetval", identifiersUsed));
identifiersUsed.Add(actualReturnIdent.Name);
var actualRetvalDecl = new SLDeclaration(true, actualReturnIdent, null,
new SLFunctionCall(String.Format("{0}.move", retvalName), false),
Visibility.None);
postMarshalCode.Add(new SLLine(actualRetvalDecl));
postMarshalCode.Add(SLFunctionCall.FunctionCallLine(
String.Format("{0}.deallocate", retvalName)));
postMarshalCode.Add(SLReturn.ReturnLine(actualReturnIdent));
break;
}
}
}
}
}
}
foreach (ICodeElement line in preMarshalCode)
{
yield return(line);
}
yield return(returnLine);
foreach (ICodeElement line in postMarshalCode)
{
yield return(line);
}
}