AstNode TransformByteCode(ILExpression byteCode)
{
object operand = byteCode.Operand;
AstType operandAsTypeRef = AstBuilder.ConvertType(operand as ITypeDefOrRef);
List<Expression> args = new List<Expression>();
foreach(ILExpression arg in byteCode.Arguments) {
args.Add((Expression)TransformExpression(arg));
}
Expression arg1 = args.Count >= 1 ? args[0] : null;
Expression arg2 = args.Count >= 2 ? args[1] : null;
Expression arg3 = args.Count >= 3 ? args[2] : null;
switch (byteCode.Code) {
#region Arithmetic
case ILCode.Add:
case ILCode.Add_Ovf:
case ILCode.Add_Ovf_Un:
{
BinaryOperatorExpression boe;
if (byteCode.InferredType is PtrSig) {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Add, arg2);
if (byteCode.Arguments[0].ExpectedType is PtrSig ||
byteCode.Arguments[1].ExpectedType is PtrSig) {
boe.AddAnnotation(IntroduceUnsafeModifier.PointerArithmeticAnnotation);
}
} else {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Add, arg2);
}
boe.AddAnnotation(byteCode.Code == ILCode.Add ? AddCheckedBlocks.UncheckedAnnotation : AddCheckedBlocks.CheckedAnnotation);
return boe;
}
case ILCode.Sub:
case ILCode.Sub_Ovf:
case ILCode.Sub_Ovf_Un:
{
BinaryOperatorExpression boe;
if (byteCode.InferredType is PtrSig) {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Subtract, arg2);
if (byteCode.Arguments[0].ExpectedType is PtrSig) {
boe.WithAnnotation(IntroduceUnsafeModifier.PointerArithmeticAnnotation);
}
} else {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Subtract, arg2);
}
boe.AddAnnotation(byteCode.Code == ILCode.Sub ? AddCheckedBlocks.UncheckedAnnotation : AddCheckedBlocks.CheckedAnnotation);
return boe;
}
case ILCode.Div: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Divide, arg2);
case ILCode.Div_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Divide, arg2);
case ILCode.Mul: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Multiply, arg2).WithAnnotation(AddCheckedBlocks.UncheckedAnnotation);
case ILCode.Mul_Ovf: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Multiply, arg2).WithAnnotation(AddCheckedBlocks.CheckedAnnotation);
case ILCode.Mul_Ovf_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Multiply, arg2).WithAnnotation(AddCheckedBlocks.CheckedAnnotation);
case ILCode.Rem: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Modulus, arg2);
case ILCode.Rem_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Modulus, arg2);
case ILCode.And: return new BinaryOperatorExpression(arg1, BinaryOperatorType.BitwiseAnd, arg2);
case ILCode.Or: return new BinaryOperatorExpression(arg1, BinaryOperatorType.BitwiseOr, arg2);
case ILCode.Xor: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ExclusiveOr, arg2);
case ILCode.Shl: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ShiftLeft, arg2);
case ILCode.Shr: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ShiftRight, arg2);
case ILCode.Shr_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ShiftRight, arg2);
case ILCode.Neg: return new UnaryOperatorExpression(UnaryOperatorType.Minus, arg1).WithAnnotation(AddCheckedBlocks.UncheckedAnnotation);
case ILCode.Not: return new UnaryOperatorExpression(UnaryOperatorType.BitNot, arg1);
case ILCode.PostIncrement:
case ILCode.PostIncrement_Ovf:
case ILCode.PostIncrement_Ovf_Un:
{
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
var uoe = new UnaryOperatorExpression(
(int)byteCode.Operand > 0 ? UnaryOperatorType.PostIncrement : UnaryOperatorType.PostDecrement, arg1);
uoe.AddAnnotation((byteCode.Code == ILCode.PostIncrement) ? AddCheckedBlocks.UncheckedAnnotation : AddCheckedBlocks.CheckedAnnotation);
return uoe;
}
#endregion
#region Arrays
case ILCode.Newarr: {
var ace = new ArrayCreateExpression();
ace.Type = operandAsTypeRef;
ComposedType ct = operandAsTypeRef as ComposedType;
if (ct != null) {
// change "new (int[,])[10] to new int[10][,]"
ct.ArraySpecifiers.MoveTo(ace.AdditionalArraySpecifiers);
}
if (byteCode.Code == ILCode.InitArray) {
ace.Initializer = new ArrayInitializerExpression();
ace.Initializer.Elements.AddRange(args);
} else {
ace.Arguments.Add(arg1);
}
return ace;
}
case ILCode.InitArray: {
var ace = new ArrayCreateExpression();
ace.Type = operandAsTypeRef;
ComposedType ct = operandAsTypeRef as ComposedType;
var arrayType = (ArraySigBase)((ITypeDefOrRef)operand).ToTypeSig(); ;
if (ct != null)
{
// change "new (int[,])[10] to new int[10][,]"
ct.ArraySpecifiers.MoveTo(ace.AdditionalArraySpecifiers);
ace.Initializer = new ArrayInitializerExpression();
}
var newArgs = new List<Expression>();
if (arrayType is ArraySig)
{
foreach (var size in arrayType.GetSizes().Skip(1).Reverse())
{
int length = (int)size;
for (int j = 0; j < args.Count; j += length)
{
var child = new ArrayInitializerExpression();
child.Elements.AddRange(args.GetRange(j, length));
newArgs.Add(child);
}
var temp = args;
args = newArgs;
newArgs = temp;
newArgs.Clear();
}
}
ace.Initializer.Elements.AddRange(args);
return ace;
}
case ILCode.Ldlen: return arg1.Member("Length").WithAnnotation(GetArrayLengthRef());
case ILCode.Ldelem_I:
case ILCode.Ldelem_I1:
case ILCode.Ldelem_I2:
case ILCode.Ldelem_I4:
case ILCode.Ldelem_I8:
case ILCode.Ldelem_U1:
case ILCode.Ldelem_U2:
case ILCode.Ldelem_U4:
case ILCode.Ldelem_R4:
case ILCode.Ldelem_R8:
case ILCode.Ldelem_Ref:
case ILCode.Ldelem_Any:
return arg1.Indexer(arg2);
case ILCode.Ldelema:
return MakeRef(arg1.Indexer(arg2));
case ILCode.Stelem_I:
case ILCode.Stelem_I1:
case ILCode.Stelem_I2:
case ILCode.Stelem_I4:
case ILCode.Stelem_I8:
case ILCode.Stelem_R4:
case ILCode.Stelem_R8:
case ILCode.Stelem_Ref:
case ILCode.Stelem_Any:
return new AssignmentExpression(arg1.Indexer(arg2), arg3);
case ILCode.CompoundAssignment:
{
CastExpression cast = arg1 as CastExpression;
var boe = cast != null ? (BinaryOperatorExpression)cast.Expression : arg1 as BinaryOperatorExpression;
// AssignmentExpression doesn't support overloaded operators so they have to be processed to BinaryOperatorExpression
if (boe == null) {
var tmp = new ParenthesizedExpression(arg1);
ReplaceMethodCallsWithOperators.ProcessInvocationExpression((InvocationExpression)arg1);
boe = (BinaryOperatorExpression)tmp.Expression;
}
var assignment = new AssignmentExpression {
Left = boe.Left.Detach(),
Operator = ReplaceMethodCallsWithOperators.GetAssignmentOperatorForBinaryOperator(boe.Operator),
Right = boe.Right.Detach()
}.CopyAnnotationsFrom(boe);
// We do not mark the resulting assignment as RestoreOriginalAssignOperatorAnnotation, because
// the operator cannot be translated back to the expanded form (as the left-hand expression
// would be evaluated twice, and might have side-effects)
if (cast != null) {
cast.Expression = assignment;
return cast;
} else {
return assignment;
}
}
#endregion
#region Comparison
case ILCode.Ceq: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Equality, arg2);
case ILCode.Cne: return new BinaryOperatorExpression(arg1, BinaryOperatorType.InEquality, arg2);
case ILCode.Cgt: return new BinaryOperatorExpression(arg1, BinaryOperatorType.GreaterThan, arg2);
case ILCode.Cgt_Un: {
// can also mean Inequality, when used with object references
var arg1Type = byteCode.Arguments[0].InferredType;
if (arg1Type != null && !arg1Type.IsValueType) goto case ILCode.Cne;
// when comparing signed integral values using Cgt_Un with 0
// the Ast should actually contain InEquality since "(uint)a > 0u" is identical to "a != 0"
if (arg1Type.IsSignedIntegralType())
{
var p = arg2 as PrimitiveExpression;
if (p != null && p.Value.IsZero()) goto case ILCode.Cne;
}
goto case ILCode.Cgt;
}
case ILCode.Cle_Un: {
// can also mean Equality, when used with object references
var arg1Type = byteCode.Arguments[0].InferredType;
if (arg1Type != null && !arg1Type.IsValueType) goto case ILCode.Ceq;
// when comparing signed integral values using Cle_Un with 0
// the Ast should actually contain Equality since "(uint)a <= 0u" is identical to "a == 0"
if (arg1Type.IsSignedIntegralType())
{
var p = arg2 as PrimitiveExpression;
if (p != null && p.Value.IsZero()) goto case ILCode.Ceq;
}
goto case ILCode.Cle;
}
case ILCode.Cle: return new BinaryOperatorExpression(arg1, BinaryOperatorType.LessThanOrEqual, arg2);
case ILCode.Cge_Un:
case ILCode.Cge: return new BinaryOperatorExpression(arg1, BinaryOperatorType.GreaterThanOrEqual, arg2);
case ILCode.Clt_Un:
case ILCode.Clt: return new BinaryOperatorExpression(arg1, BinaryOperatorType.LessThan, arg2);
#endregion
#region Logical
case ILCode.LogicNot: return new UnaryOperatorExpression(UnaryOperatorType.Not, arg1);
case ILCode.LogicAnd: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ConditionalAnd, arg2);
case ILCode.LogicOr: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ConditionalOr, arg2);
case ILCode.TernaryOp: return new ConditionalExpression() { Condition = arg1, TrueExpression = arg2, FalseExpression = arg3 };
case ILCode.NullCoalescing: return new BinaryOperatorExpression(arg1, BinaryOperatorType.NullCoalescing, arg2);
#endregion
#region Branch
case ILCode.Br: return new GotoStatement(((ILLabel)byteCode.Operand).Name);
case ILCode.Brtrue:
return new IfElseStatement() {
Condition = arg1,
TrueStatement = new BlockStatement() {
new GotoStatement(((ILLabel)byteCode.Operand).Name)
}
};
case ILCode.LoopOrSwitchBreak: return new BreakStatement();
case ILCode.LoopContinue: return new ContinueStatement();
#endregion
#region Conversions
case ILCode.Conv_I1:
case ILCode.Conv_I2:
case ILCode.Conv_I4:
case ILCode.Conv_I8:
case ILCode.Conv_U1:
case ILCode.Conv_U2:
case ILCode.Conv_U4:
case ILCode.Conv_U8:
case ILCode.Conv_I:
case ILCode.Conv_U:
{
// conversion was handled by Convert() function using the info from type analysis
CastExpression cast = arg1 as CastExpression;
if (cast != null) {
cast.AddAnnotation(AddCheckedBlocks.UncheckedAnnotation);
}
return arg1;
}
case ILCode.Conv_R4:
case ILCode.Conv_R8:
case ILCode.Conv_R_Un: // TODO
return arg1;
case ILCode.Conv_Ovf_I1:
case ILCode.Conv_Ovf_I2:
case ILCode.Conv_Ovf_I4:
case ILCode.Conv_Ovf_I8:
case ILCode.Conv_Ovf_U1:
case ILCode.Conv_Ovf_U2:
case ILCode.Conv_Ovf_U4:
case ILCode.Conv_Ovf_U8:
case ILCode.Conv_Ovf_I1_Un:
case ILCode.Conv_Ovf_I2_Un:
case ILCode.Conv_Ovf_I4_Un:
case ILCode.Conv_Ovf_I8_Un:
case ILCode.Conv_Ovf_U1_Un:
case ILCode.Conv_Ovf_U2_Un:
case ILCode.Conv_Ovf_U4_Un:
case ILCode.Conv_Ovf_U8_Un:
case ILCode.Conv_Ovf_I:
case ILCode.Conv_Ovf_U:
case ILCode.Conv_Ovf_I_Un:
case ILCode.Conv_Ovf_U_Un:
{
// conversion was handled by Convert() function using the info from type analysis
CastExpression cast = arg1 as CastExpression;
if (cast != null) {
cast.AddAnnotation(AddCheckedBlocks.CheckedAnnotation);
}
return arg1;
}
case ILCode.Unbox_Any:
// unboxing does not require a cast if the argument was an isinst instruction
if (arg1 is AsExpression && byteCode.Arguments[0].Code == ILCode.Isinst && TypeAnalysis.IsSameType(operand as ITypeDefOrRef, byteCode.Arguments[0].Operand as ITypeDefOrRef))
return arg1;
else
goto case ILCode.Castclass;
case ILCode.Castclass:
if ((byteCode.Arguments[0].InferredType != null && byteCode.Arguments[0].InferredType.IsGenericParameter) || ((ITypeDefOrRef)operand).TryGetGenericSig() != null)
return arg1.CastTo(new PrimitiveType("object").WithAnnotation(context.CurrentModule.CorLibTypes.Object.ToTypeDefOrRef())).CastTo(operandAsTypeRef);
else
return arg1.CastTo(operandAsTypeRef);
case ILCode.Isinst:
return arg1.CastAs(operandAsTypeRef);
case ILCode.Box:
return arg1;
case ILCode.Unbox:
return MakeRef(arg1.CastTo(operandAsTypeRef));
#endregion
#region Indirect
case ILCode.Ldind_Ref:
case ILCode.Ldobj:
if (arg1 is DirectionExpression)
return ((DirectionExpression)arg1).Expression.Detach();
else
return new UnaryOperatorExpression(UnaryOperatorType.Dereference, arg1);
case ILCode.Stind_Ref:
case ILCode.Stobj:
if (arg1 is DirectionExpression)
return new AssignmentExpression(((DirectionExpression)arg1).Expression.Detach(), arg2);
else
return new AssignmentExpression(new UnaryOperatorExpression(UnaryOperatorType.Dereference, arg1), arg2);
#endregion
case ILCode.Arglist:
return new UndocumentedExpression { UndocumentedExpressionType = UndocumentedExpressionType.ArgListAccess };
case ILCode.Break: return InlineAssembly(byteCode, args);
case ILCode.Call:
case ILCode.CallGetter:
case ILCode.CallSetter:
return TransformCall(false, byteCode, args);
case ILCode.Callvirt:
case ILCode.CallvirtGetter:
case ILCode.CallvirtSetter:
return TransformCall(true, byteCode, args);
case ILCode.Ldftn: {
IMethod method = (IMethod)operand;
var expr = new IdentifierExpression(method.Name);
expr.TypeArguments.AddRange(ConvertTypeArguments(method));
expr.AddAnnotation(method);
return new IdentifierExpression("ldftn").Invoke(expr)
.WithAnnotation(new DelegateConstruction.Annotation(false));
}
case ILCode.Ldvirtftn: {
IMethod method = (IMethod)operand;
var expr = new IdentifierExpression(method.Name);
expr.TypeArguments.AddRange(ConvertTypeArguments(method));
expr.AddAnnotation(method);
return new IdentifierExpression("ldvirtftn").Invoke(expr)
.WithAnnotation(new DelegateConstruction.Annotation(true));
}
case ILCode.Calli: return InlineAssembly(byteCode, args);
case ILCode.Ckfinite: return InlineAssembly(byteCode, args);
case ILCode.Constrained: return InlineAssembly(byteCode, args);
case ILCode.Cpblk: return InlineAssembly(byteCode, args);
case ILCode.Cpobj: return InlineAssembly(byteCode, args);
case ILCode.Dup: return arg1;
case ILCode.Endfilter:
return new ReturnStatement { Expression = arg1 };
case ILCode.Endfinally: return null;
case ILCode.Initblk: return InlineAssembly(byteCode, args);
case ILCode.Initobj: return InlineAssembly(byteCode, args);
case ILCode.DefaultValue:
return MakeDefaultValue(((ITypeDefOrRef)operand).ToTypeSig());
case ILCode.Jmp: return InlineAssembly(byteCode, args);
case ILCode.Ldc_I4:
return AstBuilder.MakePrimitive((int)operand, byteCode.InferredType);
case ILCode.Ldc_I8:
return AstBuilder.MakePrimitive((long)operand, byteCode.InferredType);
case ILCode.Ldc_R4:
case ILCode.Ldc_R8:
case ILCode.Ldc_Decimal:
return new PrimitiveExpression(operand);
case ILCode.Ldfld:
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
return arg1.Member(((IField)operand).Name).WithAnnotation(operand);
case ILCode.Ldsfld:
return AstBuilder.ConvertType(((IField)operand).DeclaringType)
.Member(((IField)operand).Name).WithAnnotation(operand);
case ILCode.Stfld:
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
return new AssignmentExpression(arg1.Member(((IField)operand).Name).WithAnnotation(operand), arg2);
case ILCode.Stsfld:
return new AssignmentExpression(
AstBuilder.ConvertType(((IField)operand).DeclaringType)
.Member(((IField)operand).Name).WithAnnotation(operand),
arg1);
case ILCode.Ldflda:
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
return MakeRef(arg1.Member(((IField)operand).Name).WithAnnotation(operand));
case ILCode.Ldsflda:
return MakeRef(
AstBuilder.ConvertType(((IField)operand).DeclaringType)
.Member(((IField)operand).Name).WithAnnotation(operand));
case ILCode.Ldloc: {
ILVariable v = (ILVariable)operand;
if (!v.IsParameter)
localVariablesToDefine.Add((ILVariable)operand);
Expression expr;
if (v.IsParameter && v.OriginalParameter.IsHiddenThisParameter)
expr = new ThisReferenceExpression();
else
expr = new IdentifierExpression(((ILVariable)operand).Name).WithAnnotation(operand);
return v.IsParameter && v.Type is ByRefSig ? MakeRef(expr) : expr;
}
case ILCode.Ldloca: {
ILVariable v = (ILVariable)operand;
if (v.IsParameter && v.OriginalParameter.IsHiddenThisParameter)
return MakeRef(new ThisReferenceExpression());
if (!v.IsParameter)
localVariablesToDefine.Add((ILVariable)operand);
return MakeRef(new IdentifierExpression(((ILVariable)operand).Name).WithAnnotation(operand));
}
case ILCode.Ldnull: return new NullReferenceExpression();
case ILCode.Ldstr: return new PrimitiveExpression(operand);
case ILCode.Ldtoken:
if (operand is ITypeDefOrRef) {
return AstBuilder.CreateTypeOfExpression(((ITypeDefOrRef)operand).ToTypeSig()).Member("TypeHandle").WithAnnotation(GetTypeHandleRef());
} else {
Expression referencedEntity;
string loadName;
string handleName;
MemberRef memberRef;
if (dnlibExtensions.IsField(operand)) {
loadName = "fieldof";
handleName = "FieldHandle";
memberRef = GetFieldHandleRef();
IField fr = (IField)operand;
referencedEntity = AstBuilder.ConvertType(fr.DeclaringType).Member(fr.Name).WithAnnotation(fr);
} else if (dnlibExtensions.IsMethod(operand)) {
loadName = "methodof";
handleName = "MethodHandle";
memberRef = GetMethodHandleRef();
IMethod mr = (IMethod)operand;
var methodParameters = mr.MethodSig.Params.Select(p => new TypeReferenceExpression(AstBuilder.ConvertType(p)));
referencedEntity = AstBuilder.ConvertType(mr.DeclaringType).Invoke(mr.Name, methodParameters).WithAnnotation(mr);
} else {
loadName = "ldtoken";
handleName = "Handle";
memberRef = null;
referencedEntity = new IdentifierExpression(FormatByteCodeOperand(byteCode.Operand));
}
return new IdentifierExpression(loadName).Invoke(referencedEntity).WithAnnotation(new LdTokenAnnotation()).Member(handleName);
}
case ILCode.Leave: return new GotoStatement() { Label = ((ILLabel)operand).Name };
case ILCode.Localloc:
{
PtrSig ptrType = byteCode.InferredType as PtrSig;
TypeSig type;
if (ptrType != null) {
type = ptrType.Next;
} else {
type = typeSystem.Byte;
}
return new StackAllocExpression {
Type = AstBuilder.ConvertType(type),
CountExpression = arg1
};
}
case ILCode.Mkrefany:
{
DirectionExpression dir = arg1 as DirectionExpression;
if (dir != null) {
return new UndocumentedExpression {
UndocumentedExpressionType = UndocumentedExpressionType.MakeRef,
Arguments = { dir.Expression.Detach() }
};
} else {
return InlineAssembly(byteCode, args);
}
}
case ILCode.Refanytype:
return new UndocumentedExpression {
UndocumentedExpressionType = UndocumentedExpressionType.RefType,
Arguments = { arg1 }
}.Member("TypeHandle").WithAnnotation(GetTypeHandleRef());
case ILCode.Refanyval:
return MakeRef(
new UndocumentedExpression {
UndocumentedExpressionType = UndocumentedExpressionType.RefValue,
Arguments = { arg1, new TypeReferenceExpression(operandAsTypeRef) }
});
case ILCode.Newobj: {
ITypeDefOrRef declaringType = ((IMethod)operand).DeclaringType;
if (declaringType.TryGetArraySig() != null) {
ComposedType ct = AstBuilder.ConvertType(declaringType) as ComposedType;
if (ct != null && ct.ArraySpecifiers.Count >= 1) {
var ace = new ArrayCreateExpression();
ct.ArraySpecifiers.First().Remove();
ct.ArraySpecifiers.MoveTo(ace.AdditionalArraySpecifiers);
ace.Type = ct;
ace.Arguments.AddRange(args);
return ace;
}
}
if (declaringType.IsAnonymousType()) {
MethodDef ctor = ((IMethod)operand).ResolveMethodDef();
if (ctor != null) {
AnonymousTypeCreateExpression atce = new AnonymousTypeCreateExpression();
if (CanInferAnonymousTypePropertyNamesFromArguments(args, ctor.Parameters)) {
atce.Initializers.AddRange(args);
} else {
for (int i = 0; i < args.Count; i++) {
atce.Initializers.Add(
new NamedExpression {
Name = ctor.Parameters[i].Name,
Expression = args[i]
});
}
}
return atce;
}
}
var oce = new ObjectCreateExpression();
oce.Type = AstBuilder.ConvertType(declaringType);
oce.Arguments.AddRange(args);
return oce.WithAnnotation(operand);
}
case ILCode.Nop: return null;
case ILCode.Pop: return arg1;
case ILCode.Readonly: return InlineAssembly(byteCode, args);
case ILCode.Ret:
if (methodDef.ReturnType.FullName != "System.Void") {
return new ReturnStatement { Expression = arg1 };
} else {
return new ReturnStatement();
}
case ILCode.Rethrow: return new ThrowStatement();
case ILCode.Sizeof: return new SizeOfExpression { Type = operandAsTypeRef };
case ILCode.Stloc: {
ILVariable locVar = (ILVariable)operand;
if (!locVar.IsParameter)
localVariablesToDefine.Add(locVar);
return new AssignmentExpression(new IdentifierExpression(locVar.Name).WithAnnotation(locVar), arg1);
}
case ILCode.Switch: return InlineAssembly(byteCode, args);
case ILCode.Tail: return InlineAssembly(byteCode, args);
case ILCode.Throw: return new ThrowStatement { Expression = arg1 };
case ILCode.Unaligned: return InlineAssembly(byteCode, args);
case ILCode.Volatile: return InlineAssembly(byteCode, args);
case ILCode.YieldBreak:
return new YieldBreakStatement();
case ILCode.YieldReturn:
return new YieldReturnStatement { Expression = arg1 };
case ILCode.InitObject:
case ILCode.InitCollection:
{
ArrayInitializerExpression initializer = new ArrayInitializerExpression();
for (int i = 1; i < args.Count; i++) {
Match m = objectInitializerPattern.Match(args[i]);
if (m.Success) {
MemberReferenceExpression mre = m.Get<MemberReferenceExpression>("left").Single();
var exp = new NamedExpression {
Name = mre.MemberName,
Expression = m.Get<Expression>("right").Single().Detach()
};
exp.NameToken.CopyAnnotationsFrom(mre);
initializer.Elements.Add(exp);
} else {
m = collectionInitializerPattern.Match(args[i]);
if (m.Success) {
if (m.Get("arg").Count() == 1) {
initializer.Elements.Add(m.Get<Expression>("arg").Single().Detach());
} else {
ArrayInitializerExpression argList = new ArrayInitializerExpression();
foreach (var expr in m.Get<Expression>("arg")) {
argList.Elements.Add(expr.Detach());
}
initializer.Elements.Add(argList);
}
} else {
initializer.Elements.Add(args[i]);
}
}
}
ObjectCreateExpression oce = arg1 as ObjectCreateExpression;
DefaultValueExpression dve = arg1 as DefaultValueExpression;
if (oce != null) {
oce.Initializer = initializer;
return oce;
} else if (dve != null) {
oce = new ObjectCreateExpression(dve.Type.Detach());
oce.CopyAnnotationsFrom(dve);
oce.Initializer = initializer;
return oce;
} else {
return new AssignmentExpression(arg1, initializer);
}
}
case ILCode.InitializedObject:
return new InitializedObjectExpression();
case ILCode.Wrap:
return arg1.WithAnnotation(PushNegation.LiftedOperatorAnnotation);
case ILCode.AddressOf:
return MakeRef(arg1);
case ILCode.ExpressionTreeParameterDeclarations:
args[args.Count - 1].AddAnnotation(new ParameterDeclarationAnnotation(byteCode));
return args[args.Count - 1];
case ILCode.Await:
return new UnaryOperatorExpression(UnaryOperatorType.Await, UnpackDirectionExpression(arg1));
case ILCode.NullableOf:
case ILCode.ValueOf:
return arg1;
default:
throw new Exception("Unknown OpCode: " + byteCode.Code);
}
}
AstNode TransformByteCode(ILExpression byteCode)
{
object operand = byteCode.Operand;
AstType operandAsTypeRef = AstBuilder.ConvertType(operand as Cecil.TypeReference);
var args = new List<Expression>();
foreach(ILExpression arg in byteCode.Arguments) {
args.Add((Expression)TransformExpression(arg));
}
Expression arg1 = args.Count >= 1 ? args[0] : null;
Expression arg2 = args.Count >= 2 ? args[1] : null;
Expression arg3 = args.Count >= 3 ? args[2] : null;
switch (byteCode.Code) {
#region Arithmetic
case ILCode.Add:
case ILCode.Add_Ovf:
case ILCode.Add_Ovf_Un:
{
BinaryOperatorExpression boe;
if (byteCode.InferredType is PointerType) {
if (byteCode.Arguments[0].ExpectedType is PointerType) {
arg2 = DivideBySize(arg2, ((PointerType)byteCode.InferredType).ElementType);
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Add, arg2);
boe.AddAnnotation(IntroduceUnsafeModifier.PointerArithmeticAnnotation);
} else if (byteCode.Arguments[1].ExpectedType is PointerType) {
arg1 = DivideBySize(arg1, ((PointerType)byteCode.InferredType).ElementType);
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Add, arg2);
boe.AddAnnotation(IntroduceUnsafeModifier.PointerArithmeticAnnotation);
} else {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Add, arg2);
}
} else {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Add, arg2);
}
boe.AddAnnotation(byteCode.Code == ILCode.Add ? AddCheckedBlocks.UncheckedAnnotation : AddCheckedBlocks.CheckedAnnotation);
return boe;
}
case ILCode.Sub:
case ILCode.Sub_Ovf:
case ILCode.Sub_Ovf_Un:
{
BinaryOperatorExpression boe;
if (byteCode.InferredType is PointerType) {
if (byteCode.Arguments[0].ExpectedType is PointerType) {
arg2 = DivideBySize(arg2, ((PointerType)byteCode.InferredType).ElementType);
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Subtract, arg2);
boe.WithAnnotation(IntroduceUnsafeModifier.PointerArithmeticAnnotation);
} else {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Subtract, arg2);
}
} else {
boe = new BinaryOperatorExpression(arg1, BinaryOperatorType.Subtract, arg2);
}
boe.AddAnnotation(byteCode.Code == ILCode.Sub ? AddCheckedBlocks.UncheckedAnnotation : AddCheckedBlocks.CheckedAnnotation);
return boe;
}
case ILCode.Div: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Divide, arg2);
case ILCode.Div_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Divide, arg2);
case ILCode.Mul: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Multiply, arg2).WithAnnotation(AddCheckedBlocks.UncheckedAnnotation);
case ILCode.Mul_Ovf: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Multiply, arg2).WithAnnotation(AddCheckedBlocks.CheckedAnnotation);
case ILCode.Mul_Ovf_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Multiply, arg2).WithAnnotation(AddCheckedBlocks.CheckedAnnotation);
case ILCode.Rem: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Modulus, arg2);
case ILCode.Rem_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Modulus, arg2);
case ILCode.And: return new BinaryOperatorExpression(arg1, BinaryOperatorType.BitwiseAnd, arg2);
case ILCode.Or: return new BinaryOperatorExpression(arg1, BinaryOperatorType.BitwiseOr, arg2);
case ILCode.Xor: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ExclusiveOr, arg2);
case ILCode.Shl: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ShiftLeft, arg2);
case ILCode.Shr: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ShiftRight, arg2);
case ILCode.Shr_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ShiftRight, arg2);
case ILCode.Neg: return new UnaryOperatorExpression(UnaryOperatorType.Minus, arg1).WithAnnotation(AddCheckedBlocks.UncheckedAnnotation);
case ILCode.Not: return new UnaryOperatorExpression(UnaryOperatorType.BitNot, arg1);
case ILCode.PostIncrement:
case ILCode.PostIncrement_Ovf:
case ILCode.PostIncrement_Ovf_Un:
{
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
var uoe = new UnaryOperatorExpression(
(int)byteCode.Operand > 0 ? UnaryOperatorType.PostIncrement : UnaryOperatorType.PostDecrement, arg1);
uoe.AddAnnotation((byteCode.Code == ILCode.PostIncrement) ? AddCheckedBlocks.UncheckedAnnotation : AddCheckedBlocks.CheckedAnnotation);
return uoe;
}
#endregion
#region Arrays
case ILCode.Newarr: {
var ace = new ArrayCreateExpression();
ace.Type = operandAsTypeRef;
ComposedType ct = operandAsTypeRef as ComposedType;
if (ct != null) {
// change "new (int[,])[10] to new int[10][,]"
ct.ArraySpecifiers.MoveTo(ace.AdditionalArraySpecifiers);
}
if (byteCode.Code == ILCode.InitArray) {
ace.Initializer = new ArrayInitializerExpression();
ace.Initializer.Elements.AddRange(args);
} else {
ace.Arguments.Add(arg1);
}
return ace;
}
case ILCode.InitArray: {
var ace = new ArrayCreateExpression();
ace.Type = operandAsTypeRef;
ComposedType ct = operandAsTypeRef as ComposedType;
var arrayType = (ArrayType) operand;
if (ct != null)
{
// change "new (int[,])[10] to new int[10][,]"
ct.ArraySpecifiers.MoveTo(ace.AdditionalArraySpecifiers);
ace.Initializer = new ArrayInitializerExpression();
var first = ace.AdditionalArraySpecifiers.First();
first.Remove();
ace.Arguments.AddRange(Enumerable.Repeat(0, first.Dimensions).Select(i => (Expression)new EmptyExpression()));
}
var newArgs = new List<Expression>();
foreach (var arrayDimension in arrayType.Dimensions.Skip(1).Reverse())
{
int length = (int)arrayDimension.UpperBound - (arrayDimension.LowerBound ?? 0);
for (int j = 0; j < args.Count; j += length)
{
var child = new ArrayInitializerExpression();
child.Elements.AddRange(args.GetRange(j, length));
newArgs.Add(child);
}
var temp = args;
args = newArgs;
newArgs = temp;
newArgs.Clear();
}
ace.Initializer.Elements.AddRange(args);
return ace;
}
case ILCode.Ldlen: return arg1.Member("Length");
case ILCode.Ldelem_I:
case ILCode.Ldelem_I1:
case ILCode.Ldelem_I2:
case ILCode.Ldelem_I4:
case ILCode.Ldelem_I8:
case ILCode.Ldelem_U1:
case ILCode.Ldelem_U2:
case ILCode.Ldelem_U4:
case ILCode.Ldelem_R4:
case ILCode.Ldelem_R8:
case ILCode.Ldelem_Ref:
case ILCode.Ldelem_Any:
return arg1.Indexer(arg2);
case ILCode.Ldelema:
return MakeRef(arg1.Indexer(arg2));
case ILCode.Stelem_I:
case ILCode.Stelem_I1:
case ILCode.Stelem_I2:
case ILCode.Stelem_I4:
case ILCode.Stelem_I8:
case ILCode.Stelem_R4:
case ILCode.Stelem_R8:
case ILCode.Stelem_Ref:
case ILCode.Stelem_Any:
return new AssignmentExpression(arg1.Indexer(arg2), arg3);
case ILCode.CompoundAssignment:
{
CastExpression cast = arg1 as CastExpression;
BinaryOperatorExpression boe = (BinaryOperatorExpression)(cast != null ? cast.Expression : arg1);
var assignment = new AssignmentExpression {
Left = boe.Left.Detach(),
Operator = ReplaceMethodCallsWithOperators.GetAssignmentOperatorForBinaryOperator(boe.Operator),
Right = boe.Right.Detach()
}.CopyAnnotationsFrom(boe);
// We do not mark the resulting assignment as RestoreOriginalAssignOperatorAnnotation, because
// the operator cannot be translated back to the expanded form (as the left-hand expression
// would be evaluated twice, and might have side-effects)
if (cast != null) {
cast.Expression = assignment;
return cast;
} else {
return assignment;
}
}
#endregion
#region Comparison
case ILCode.Ceq: return new BinaryOperatorExpression(arg1, BinaryOperatorType.Equality, arg2);
case ILCode.Cgt: return new BinaryOperatorExpression(arg1, BinaryOperatorType.GreaterThan, arg2);
case ILCode.Cgt_Un: {
// can also mean Inequality, when used with object references
TypeReference arg1Type = byteCode.Arguments[0].InferredType;
if (arg1Type != null && !arg1Type.IsValueType)
return new BinaryOperatorExpression(arg1, BinaryOperatorType.InEquality, arg2);
else
return new BinaryOperatorExpression(arg1, BinaryOperatorType.GreaterThan, arg2);
}
case ILCode.Clt: return new BinaryOperatorExpression(arg1, BinaryOperatorType.LessThan, arg2);
case ILCode.Clt_Un: return new BinaryOperatorExpression(arg1, BinaryOperatorType.LessThan, arg2);
#endregion
#region Logical
case ILCode.LogicNot: return new UnaryOperatorExpression(UnaryOperatorType.Not, arg1);
case ILCode.LogicAnd: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ConditionalAnd, arg2);
case ILCode.LogicOr: return new BinaryOperatorExpression(arg1, BinaryOperatorType.ConditionalOr, arg2);
case ILCode.TernaryOp: return new ConditionalExpression() { Condition = arg1, TrueExpression = arg2, FalseExpression = arg3 };
case ILCode.NullCoalescing: return new BinaryOperatorExpression(arg1, BinaryOperatorType.NullCoalescing, arg2);
#endregion
#region Branch
case ILCode.Br: return new GotoStatement(((ILLabel)byteCode.Operand).Name);
case ILCode.Brtrue:
return new IfElseStatement() {
Condition = arg1,
TrueStatement = new BlockStatement() {
new GotoStatement(((ILLabel)byteCode.Operand).Name)
}
};
case ILCode.LoopOrSwitchBreak: return new BreakStatement();
case ILCode.LoopContinue: return new ContinueStatement();
#endregion
#region Conversions
case ILCode.Conv_I1:
case ILCode.Conv_I2:
case ILCode.Conv_I4:
case ILCode.Conv_I8:
case ILCode.Conv_U1:
case ILCode.Conv_U2:
case ILCode.Conv_U4:
case ILCode.Conv_U8:
case ILCode.Conv_I:
case ILCode.Conv_U:
{
// conversion was handled by Convert() function using the info from type analysis
CastExpression cast = arg1 as CastExpression;
if (cast != null) {
cast.AddAnnotation(AddCheckedBlocks.UncheckedAnnotation);
}
return arg1;
}
case ILCode.Conv_R4:
case ILCode.Conv_R8:
case ILCode.Conv_R_Un: // TODO
return arg1;
case ILCode.Conv_Ovf_I1:
case ILCode.Conv_Ovf_I2:
case ILCode.Conv_Ovf_I4:
case ILCode.Conv_Ovf_I8:
case ILCode.Conv_Ovf_U1:
case ILCode.Conv_Ovf_U2:
case ILCode.Conv_Ovf_U4:
case ILCode.Conv_Ovf_U8:
case ILCode.Conv_Ovf_I1_Un:
case ILCode.Conv_Ovf_I2_Un:
case ILCode.Conv_Ovf_I4_Un:
case ILCode.Conv_Ovf_I8_Un:
case ILCode.Conv_Ovf_U1_Un:
case ILCode.Conv_Ovf_U2_Un:
case ILCode.Conv_Ovf_U4_Un:
case ILCode.Conv_Ovf_U8_Un:
{
// conversion was handled by Convert() function using the info from type analysis
CastExpression cast = arg1 as CastExpression;
if (cast != null) {
cast.AddAnnotation(AddCheckedBlocks.CheckedAnnotation);
}
return arg1;
}
case ILCode.Conv_Ovf_I: return arg1.CastTo(typeof(IntPtr)); // TODO
case ILCode.Conv_Ovf_U: return arg1.CastTo(typeof(UIntPtr));
case ILCode.Conv_Ovf_I_Un: return arg1.CastTo(typeof(IntPtr));
case ILCode.Conv_Ovf_U_Un: return arg1.CastTo(typeof(UIntPtr));
case ILCode.Castclass: return arg1.CastTo(operandAsTypeRef);
case ILCode.Unbox_Any:
// unboxing does not require a cast if the argument was an isinst instruction
if (arg1 is AsExpression && byteCode.Arguments[0].Code == ILCode.Isinst && TypeAnalysis.IsSameType(operand as TypeReference, byteCode.Arguments[0].Operand as TypeReference))
return arg1;
else
return arg1.CastTo(operandAsTypeRef);
case ILCode.Isinst:
return arg1.CastAs(operandAsTypeRef);
case ILCode.Box:
return arg1;
case ILCode.Unbox:
return MakeRef(arg1.CastTo(operandAsTypeRef));
#endregion
#region Indirect
case ILCode.Ldind_Ref:
case ILCode.Ldobj:
if (arg1 is DirectionExpression)
return ((DirectionExpression)arg1).Expression.Detach();
else
return new UnaryOperatorExpression(UnaryOperatorType.Dereference, arg1);
case ILCode.Stind_Ref:
case ILCode.Stobj:
if (arg1 is DirectionExpression)
return new AssignmentExpression(((DirectionExpression)arg1).Expression.Detach(), arg2);
else
return new AssignmentExpression(new UnaryOperatorExpression(UnaryOperatorType.Dereference, arg1), arg2);
#endregion
case ILCode.Arglist:
return new UndocumentedExpression { UndocumentedExpressionType = UndocumentedExpressionType.ArgListAccess };
case ILCode.Break: return InlineAssembly(byteCode, args);
case ILCode.Call:
case ILCode.CallGetter:
case ILCode.CallSetter:
return TransformCall(false, byteCode, args);
case ILCode.Callvirt:
case ILCode.CallvirtGetter:
case ILCode.CallvirtSetter:
return TransformCall(true, byteCode, args);
case ILCode.Ldftn: {
Cecil.MethodReference cecilMethod = ((MethodReference)operand);
var expr = new IdentifierExpression(cecilMethod.Name);
expr.TypeArguments.AddRange(ConvertTypeArguments(cecilMethod));
expr.AddAnnotation(cecilMethod);
return new IdentifierExpression("ldftn").Invoke(expr)
.WithAnnotation(new Transforms.DelegateConstruction.Annotation(false));
}
case ILCode.Ldvirtftn: {
Cecil.MethodReference cecilMethod = ((MethodReference)operand);
var expr = new IdentifierExpression(cecilMethod.Name);
expr.TypeArguments.AddRange(ConvertTypeArguments(cecilMethod));
expr.AddAnnotation(cecilMethod);
return new IdentifierExpression("ldvirtftn").Invoke(expr)
.WithAnnotation(new Transforms.DelegateConstruction.Annotation(true));
}
case ILCode.Calli: return InlineAssembly(byteCode, args);
case ILCode.Ckfinite: return InlineAssembly(byteCode, args);
case ILCode.Constrained: return InlineAssembly(byteCode, args);
case ILCode.Cpblk: return InlineAssembly(byteCode, args);
case ILCode.Cpobj: return InlineAssembly(byteCode, args);
case ILCode.Dup: return arg1;
case ILCode.Endfilter: return InlineAssembly(byteCode, args);
case ILCode.Endfinally: return null;
case ILCode.Initblk: return InlineAssembly(byteCode, args);
case ILCode.Initobj: return InlineAssembly(byteCode, args);
case ILCode.DefaultValue:
return MakeDefaultValue((TypeReference)operand);
case ILCode.Jmp: return InlineAssembly(byteCode, args);
case ILCode.Ldc_I4:
return AstBuilder.MakePrimitive((int)operand, byteCode.InferredType);
case ILCode.Ldc_I8:
return AstBuilder.MakePrimitive((long)operand, byteCode.InferredType);
case ILCode.Ldc_R4:
case ILCode.Ldc_R8:
case ILCode.Ldc_Decimal:
return new PrimitiveExpression(operand);
case ILCode.Ldfld:
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
return arg1.Member(((FieldReference) operand).Name).WithAnnotation(operand);
case ILCode.Ldsfld:
return AstBuilder.ConvertType(((FieldReference)operand).DeclaringType)
.Member(((FieldReference)operand).Name).WithAnnotation(operand);
case ILCode.Stfld:
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
return new AssignmentExpression(arg1.Member(((FieldReference) operand).Name).WithAnnotation(operand), arg2);
case ILCode.Stsfld:
return new AssignmentExpression(
AstBuilder.ConvertType(((FieldReference)operand).DeclaringType)
.Member(((FieldReference)operand).Name).WithAnnotation(operand),
arg1);
case ILCode.Ldflda:
if (arg1 is DirectionExpression)
arg1 = ((DirectionExpression)arg1).Expression.Detach();
return MakeRef(arg1.Member(((FieldReference) operand).Name).WithAnnotation(operand));
case ILCode.Ldsflda:
return MakeRef(
AstBuilder.ConvertType(((FieldReference)operand).DeclaringType)
.Member(((FieldReference)operand).Name).WithAnnotation(operand));
case ILCode.Ldloc: {
ILVariable v = (ILVariable)operand;
if (!v.IsParameter)
localVariablesToDefine.Add((ILVariable)operand);
Expression expr;
if (v.IsParameter && v.OriginalParameter.Index < 0)
expr = new ThisReferenceExpression();
else
expr = new IdentifierExpression(((ILVariable)operand).Name).WithAnnotation(operand);
return v.IsParameter && v.Type is ByReferenceType ? MakeRef(expr) : expr;
}
case ILCode.Ldloca: {
ILVariable v = (ILVariable)operand;
if (v.IsParameter && v.OriginalParameter.Index < 0)
return MakeRef(new ThisReferenceExpression());
if (!v.IsParameter)
localVariablesToDefine.Add((ILVariable)operand);
return MakeRef(new IdentifierExpression(((ILVariable)operand).Name).WithAnnotation(operand));
}
case ILCode.Ldnull: return new NullReferenceExpression();
case ILCode.Ldstr: return new PrimitiveExpression(operand);
case ILCode.Ldtoken:
if (operand is Cecil.TypeReference) {
return AstBuilder.CreateTypeOfExpression((TypeReference)operand).Member("TypeHandle");
} else {
return InlineAssembly(byteCode, args);
}
case ILCode.Leave: return new GotoStatement() { Label = ((ILLabel)operand).Name };
case ILCode.Localloc:
{
PointerType ptrType = byteCode.InferredType as PointerType;
TypeReference type;
if (ptrType != null) {
type = ptrType.ElementType;
} else {
type = typeSystem.Byte;
}
return new StackAllocExpression {
Type = AstBuilder.ConvertType(type),
CountExpression = DivideBySize(arg1, type)
};
}
case ILCode.Mkrefany:
{
DirectionExpression dir = arg1 as DirectionExpression;
if (dir != null) {
return new UndocumentedExpression {
UndocumentedExpressionType = UndocumentedExpressionType.MakeRef,
Arguments = { dir.Expression.Detach() }
};
} else {
return InlineAssembly(byteCode, args);
}
}
case ILCode.Refanytype:
return new UndocumentedExpression {
UndocumentedExpressionType = UndocumentedExpressionType.RefType,
Arguments = { arg1 }
}.Member("TypeHandle");
case ILCode.Refanyval:
return MakeRef(
new UndocumentedExpression {
UndocumentedExpressionType = UndocumentedExpressionType.RefValue,
Arguments = { arg1, new TypeReferenceExpression(operandAsTypeRef) }
});
case ILCode.Newobj: {
Cecil.TypeReference declaringType = ((MethodReference)operand).DeclaringType;
if (declaringType is ArrayType) {
ComposedType ct = AstBuilder.ConvertType((ArrayType)declaringType) as ComposedType;
if (ct != null && ct.ArraySpecifiers.Count >= 1) {
var ace = new ArrayCreateExpression();
ct.ArraySpecifiers.First().Remove();
ct.ArraySpecifiers.MoveTo(ace.AdditionalArraySpecifiers);
ace.Type = ct;
ace.Arguments.AddRange(args);
return ace;
}
}
var oce = new ObjectCreateExpression();
if (declaringType.IsAnonymousType()) {
MethodDefinition ctor = ((MethodReference)operand).Resolve();
if (methodDef != null) {
oce.Initializer = new ArrayInitializerExpression();
for (int i = 0; i < args.Count; i++) {
oce.Initializer.Elements.Add(
new NamedArgumentExpression {
Identifier = ctor.Parameters[i].Name,
Expression = args[i]
});
}
}
return oce;
}
oce.Type = AstBuilder.ConvertType(declaringType);
oce.Arguments.AddRange(args);
return oce.WithAnnotation(operand);
}
case ILCode.No: return InlineAssembly(byteCode, args);
case ILCode.Nop: return null;
case ILCode.Pop: return arg1;
case ILCode.Readonly: return InlineAssembly(byteCode, args);
case ILCode.Ret:
if (methodDef.ReturnType.FullName != "System.Void") {
return new ReturnStatement { Expression = arg1 };
} else {
return new ReturnStatement();
}
case ILCode.Rethrow: return new ThrowStatement();
case ILCode.Sizeof: return new SizeOfExpression { Type = operandAsTypeRef };
case ILCode.Stloc: {
ILVariable locVar = (ILVariable)operand;
if (!locVar.IsParameter)
localVariablesToDefine.Add(locVar);
return new AssignmentExpression(new IdentifierExpression(locVar.Name).WithAnnotation(locVar), arg1);
}
case ILCode.Switch: return InlineAssembly(byteCode, args);
case ILCode.Tail: return InlineAssembly(byteCode, args);
case ILCode.Throw: return new ThrowStatement { Expression = arg1 };
case ILCode.Unaligned: return InlineAssembly(byteCode, args);
case ILCode.Volatile: return InlineAssembly(byteCode, args);
case ILCode.YieldBreak:
return new YieldBreakStatement();
case ILCode.YieldReturn:
return new YieldStatement { Expression = arg1 };
case ILCode.InitObject:
case ILCode.InitCollection:
{
ArrayInitializerExpression initializer = new ArrayInitializerExpression();
for (int i = 1; i < args.Count; i++) {
Match m = objectInitializerPattern.Match(args[i]);
if (m.Success) {
MemberReferenceExpression mre = m.Get<MemberReferenceExpression>("left").Single();
initializer.Elements.Add(
new NamedArgumentExpression {
Identifier = mre.MemberName,
Expression = m.Get<Expression>("right").Single().Detach()
}.CopyAnnotationsFrom(mre));
} else {
m = collectionInitializerPattern.Match(args[i]);
if (m.Success) {
if (m.Get("arg").Count() == 1) {
initializer.Elements.Add(m.Get<Expression>("arg").Single().Detach());
} else {
ArrayInitializerExpression argList = new ArrayInitializerExpression();
foreach (var expr in m.Get<Expression>("arg")) {
argList.Elements.Add(expr.Detach());
}
initializer.Elements.Add(argList);
}
} else {
initializer.Elements.Add(args[i]);
}
}
}
ObjectCreateExpression oce = arg1 as ObjectCreateExpression;
DefaultValueExpression dve = arg1 as DefaultValueExpression;
if (oce != null) {
oce.Initializer = initializer;
return oce;
} else if (dve != null) {
oce = new ObjectCreateExpression(dve.Type.Detach());
oce.CopyAnnotationsFrom(dve);
oce.Initializer = initializer;
return oce;
} else {
return new AssignmentExpression(arg1, initializer);
}
}
case ILCode.InitializedObject:
return new InitializedObjectExpression();
case ILCode.AddressOf:
return MakeRef(arg1);
default:
throw new Exception("Unknown OpCode: " + byteCode.Code);
}
}