protected override bool EmitInternal(TryExpression node, EmittingContext context, GroboIL.Label returnDefaultValueLabel, ResultType whatReturn, bool extend, out Type resultType)
{
var il = context.Il;
il.BeginExceptionBlock();
returnDefaultValueLabel = context.CanReturn ? il.DefineLabel("returnDefaultValue") : null;
bool returnDefaultValueLabelUsed = ExpressionEmittersCollection.Emit(node.Body, context, returnDefaultValueLabel, whatReturn, extend, out resultType);
EmittingContext.LocalHolder retValue = null;
var doneLabel = il.DefineLabel("done");
if (resultType == typeof(void))
{
if (returnDefaultValueLabelUsed)
{
context.MarkLabelAndSurroundWithSP(returnDefaultValueLabel);
}
il.Leave(doneLabel);
}
else
{
retValue = context.DeclareLocal(resultType);
il.Stloc(retValue);
il.Leave(doneLabel);
if (returnDefaultValueLabelUsed)
{
context.MarkLabelAndSurroundWithSP(returnDefaultValueLabel);
if (resultType.IsValueType)
{
il.Ldloca(retValue);
il.Initobj(resultType);
}
else
{
il.Ldnull();
il.Stloc(retValue);
}
il.Leave(doneLabel);
}
}
foreach (var catchBlock in node.Handlers)
{
bool disposeVariable = false;
var variable = catchBlock.Variable;
if (catchBlock.Filter == null)
{
il.BeginCatchBlock(catchBlock.Test);
if (variable == null)
{
il.Pop();
}
else
{
// todo вызвать ф-цию из AssignExpressionEmitter
var index = Array.IndexOf(context.Parameters, variable);
if (index >= 0)
{
il.Starg(index);
}
else
{
GroboIL.Local local;
if (!context.VariablesToLocals.TryGetValue(variable, out local))
{
local = context.DeclareLocal(variable.Type);
context.VariablesToLocals.Add(variable, local);
context.Variables.Push(variable);
disposeVariable = true;
}
il.Stloc(local);
}
}
}
else
{
il.BeginExceptFilterBlock();
il.Isinst(catchBlock.Test);
il.Dup();
var rightTypeLabel = il.DefineLabel("rightType");
il.Brtrue(rightTypeLabel);
il.Pop();
il.Ldc_I4(0);
var endFilterLabel = il.DefineLabel("endFilter");
il.Br(endFilterLabel);
context.MarkLabelAndSurroundWithSP(rightTypeLabel);
if (variable == null)
{
il.Pop();
}
else
{
// todo вызвать ф-цию из AssignExpressionEmitter
var index = Array.IndexOf(context.Parameters, variable);
if (index >= 0)
{
il.Starg(index);
}
else
{
GroboIL.Local local;
if (!context.VariablesToLocals.TryGetValue(variable, out local))
{
local = string.IsNullOrEmpty(variable.Name)
? context.Il.DeclareLocal(variable.Type)
: context.Il.DeclareLocal(variable.Type, variable.Name, appendUniquePrefix: false);
if (context.DebugInfoGenerator != null)
{
local.SetLocalSymInfo(local.Name);
}
context.VariablesToLocals.Add(variable, local);
context.Variables.Push(variable);
disposeVariable = true;
}
il.Stloc(local);
}
}
GroboIL.Label returnFalseLabel = context.CanReturn ? il.DefineLabel("returnFalse") : null;
Type filterResultType;
bool returnFalseLabelUsed = ExpressionEmittersCollection.Emit(catchBlock.Filter, context, returnFalseLabel, out filterResultType);
if (returnFalseLabelUsed)
{
il.Br(endFilterLabel);
context.MarkLabelAndSurroundWithSP(returnFalseLabel);
il.Pop();
il.Ldc_I4(0);
}
context.MarkLabelAndSurroundWithSP(endFilterLabel);
il.BeginCatchBlock(null);
il.Pop();
}
context.EmitLoadArguments(catchBlock.Body);
if (catchBlock.Body.Type != typeof(void))
{
il.Stloc(retValue);
}
if (disposeVariable)
{
context.VariablesToLocals.Remove(variable);
context.Variables.Pop();
}
}
if (node.Fault != null)
{
il.BeginFaultBlock();
EmitExpressionAsVoid(node.Fault, context);
}
if (node.Finally != null)
{
il.BeginFinallyBlock();
EmitExpressionAsVoid(node.Finally, context);
}
il.EndExceptionBlock();
context.MarkLabelAndSurroundWithSP(doneLabel);
if (retValue != null)
{
il.Ldloc(retValue);
retValue.Dispose();
}
return(false);
}
private static void EmitAssign(AssigneeKind assigneeKind, Expression node, EmittingContext context, object[] arguments, EmittingContext.LocalHolder value)
{
var il = context.Il;
switch (assigneeKind)
{
case AssigneeKind.Parameter:
il.Ldloc(value);
var index = Array.IndexOf(context.Parameters, node);
if (index >= 0)
{
il.Starg(index);
}
else
{
GroboIL.Local variable;
if (context.VariablesToLocals.TryGetValue((ParameterExpression)node, out variable))
{
il.Stloc(variable);
}
else
{
throw new InvalidOperationException("Unknown parameter " + node);
}
}
break;
case AssigneeKind.SimpleArray:
il.Ldloc(value);
il.Stind(node.Type);
break;
case AssigneeKind.InstanceField:
case AssigneeKind.StaticField:
il.Ldloc(value);
il.Stfld((FieldInfo)((MemberExpression)node).Member);
break;
case AssigneeKind.InstanceProperty:
case AssigneeKind.StaticProperty:
il.Ldloc(value);
var memberExpression = (MemberExpression)node;
il.Call(((PropertyInfo)memberExpression.Member).GetSetMethod(context.SkipVisibility), memberExpression.Expression == null ? null : memberExpression.Expression.Type);
break;
case AssigneeKind.IndexedProperty:
{
var indexExpression = (IndexExpression)node;
if (arguments == null)
{
context.EmitLoadArguments(indexExpression.Arguments.ToArray());
}
else
{
foreach (var argument in arguments)
{
if (argument is Expression)
{
context.EmitLoadArguments((Expression)argument);
}
else
{
var local = (EmittingContext.LocalHolder)argument;
il.Ldloc(local);
local.Dispose();
}
}
}
il.Ldloc(value);
MethodInfo setter = indexExpression.Indexer.GetSetMethod(context.SkipVisibility);
if (setter == null)
{
throw new MissingMethodException(indexExpression.Indexer.ReflectedType.ToString(), "set_" + indexExpression.Indexer.Name);
}
context.Il.Call(setter, indexExpression.Object.Type);
}
break;
case AssigneeKind.MultiDimensionalArray:
{
var indexExpression = (IndexExpression)node;
Type arrayType = indexExpression.Object.Type;
if (!arrayType.IsArray)
{
throw new InvalidOperationException("An array expected");
}
int rank = arrayType.GetArrayRank();
if (rank != indexExpression.Arguments.Count)
{
throw new InvalidOperationException("Incorrect number of indeces '" + indexExpression.Arguments.Count + "' provided to access an array with rank '" + rank + "'");
}
Type indexType = indexExpression.Arguments.First().Type;
if (indexType != typeof(int))
{
throw new InvalidOperationException("Indexing array with an index of type '" + indexType + "' is not allowed");
}
if (arguments == null)
{
context.EmitLoadArguments(indexExpression.Arguments.ToArray());
}
else
{
foreach (var argument in arguments)
{
if (argument is Expression)
{
context.EmitLoadArguments((Expression)argument);
}
else
{
var local = (EmittingContext.LocalHolder)argument;
il.Ldloc(local);
local.Dispose();
}
}
}
il.Ldloc(value);
MethodInfo setMethod = arrayType.GetMethod("Set");
if (setMethod == null)
{
throw new MissingMethodException(arrayType.ToString(), "Set");
}
context.Il.Call(setMethod, arrayType);
}
break;
}
}
protected override bool EmitInternal(SwitchExpression node, EmittingContext context, GroboIL.Label returnDefaultValueLabel, ResultType whatReturn, bool extend, out Type resultType)
{
GroboIL il = context.Il;
var defaultLabel = il.DefineLabel("default");
var caseLabels = new GroboIL.Label[node.Cases.Count];
GroboIL.Label switchValueIsNullLabel = null;
for (int index = 0; index < node.Cases.Count; index++)
{
caseLabels[index] = il.DefineLabel("case#" + index);
}
context.EmitLoadArguments(node.SwitchValue);
using (var switchValue = context.DeclareLocal(node.SwitchValue.Type))
{
il.Stloc(switchValue);
Tuple <int, int, int> switchCase;
if (context.ParsedLambda.ParsedSwitches.TryGetValue(node, out switchCase))
{
// use simplified hashtable to locate the proper case
var labels = new List <GroboIL.Label>();
for (int index = 0; index < node.Cases.Count; index++)
{
foreach (var testValue in node.Cases[index].TestValues)
{
if (((ConstantExpression)testValue).Value != null)
{
labels.Add(caseLabels[index]);
}
else
{
switchValueIsNullLabel = caseLabels[index];
}
}
}
if (switchValueIsNullLabel != null)
{
if (!node.SwitchValue.Type.IsNullable())
{
il.Ldloc(switchValue);
}
else
{
il.Ldloca(switchValue);
context.EmitHasValueAccess(node.SwitchValue.Type);
}
il.Brfalse(switchValueIsNullLabel);
}
EmittingContext.LocalHolder pureSwitchValue = switchValue;
if (node.SwitchValue.Type.IsNullable())
{
pureSwitchValue = context.DeclareLocal(node.SwitchValue.Type.GetGenericArguments()[0]);
il.Ldloca(switchValue);
context.EmitValueAccess(node.SwitchValue.Type);
il.Stloc(pureSwitchValue);
}
Type temp;
ExpressionEmittersCollection.Emit(context.ParsedLambda.ConstantsBuilder.MakeAccess(context.ParsedLambda.ConstantsParameter, switchCase.Item1), context, out temp);
var type = node.SwitchValue.Type.IsNullable() ? node.SwitchValue.Type.GetGenericArguments()[0] : node.SwitchValue.Type;
var typeCode = Type.GetTypeCode(type);
switch (typeCode)
{
case TypeCode.Byte:
case TypeCode.Char:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.SByte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
il.Ldloc(pureSwitchValue);
break;
default:
if (type.IsValueType)
{
il.Ldloca(pureSwitchValue);
}
else
{
il.Ldloc(pureSwitchValue);
}
il.Call(typeof(object).GetMethod("GetHashCode"), type);
break;
}
using (var index = context.DeclareLocal(typeof(int)))
{
if (typeCode == TypeCode.Int64 || typeCode == TypeCode.UInt64)
{
il.Ldc_I8(switchCase.Item3);
}
else
{
il.Ldc_I4(switchCase.Item3);
}
il.Rem(true);
if (typeCode == TypeCode.Int64 || typeCode == TypeCode.UInt64)
{
il.Conv <int>();
}
il.Stloc(index);
il.Ldloc(index);
il.Ldelem(type);
il.Ldloc(pureSwitchValue);
if (node.Comparison != null)
{
il.Call(node.Comparison);
}
else
{
il.Ceq();
}
il.Brfalse(defaultLabel);
ExpressionEmittersCollection.Emit(context.ParsedLambda.ConstantsBuilder.MakeAccess(context.ParsedLambda.ConstantsParameter, switchCase.Item2), context, out temp);
il.Ldloc(index);
il.Ldelem(typeof(int));
il.Switch(labels.ToArray());
}
if (pureSwitchValue != switchValue)
{
pureSwitchValue.Dispose();
}
}
else
{
// use a number of if/else branches to locate the proper case
EmittingContext.LocalHolder pureSwitchValue = switchValue;
EmittingContext.LocalHolder switchValueIsNull = null;
if (node.SwitchValue.Type.IsNullable())
{
pureSwitchValue = context.DeclareLocal(node.SwitchValue.Type.GetGenericArguments()[0]);
switchValueIsNull = context.DeclareLocal(typeof(bool));
il.Ldloca(switchValue);
il.Dup();
context.EmitValueAccess(node.SwitchValue.Type);
il.Stloc(pureSwitchValue);
context.EmitHasValueAccess(node.SwitchValue.Type);
il.Stloc(switchValueIsNull);
}
for (int index = 0; index < node.Cases.Count; index++)
{
var caSe = node.Cases[index];
var label = caseLabels[index];
foreach (var testValue in caSe.TestValues)
{
context.EmitLoadArguments(testValue);
GroboIL.Label elseLabel = null;
if (testValue.Type.IsNullable())
{
elseLabel = il.DefineLabel("else");
using (var temp = context.DeclareLocal(testValue.Type))
{
il.Stloc(temp);
il.Ldloca(temp);
context.EmitHasValueAccess(testValue.Type);
if (switchValueIsNull != null)
{
il.Ldloc(switchValueIsNull);
il.Or();
il.Brfalse(label);
il.Ldloca(temp);
context.EmitHasValueAccess(testValue.Type);
il.Ldloc(switchValueIsNull);
il.And();
}
il.Brfalse(elseLabel);
il.Ldloca(temp);
context.EmitValueAccess(testValue.Type);
}
}
il.Ldloc(pureSwitchValue);
if (node.Comparison != null)
{
il.Call(node.Comparison);
}
else
{
il.Ceq();
}
il.Brtrue(label);
if (elseLabel != null)
{
context.MarkLabelAndSurroundWithSP(elseLabel);
}
}
}
}
}
context.MarkLabelAndSurroundWithSP(defaultLabel);
var doneLabel = il.DefineLabel("done");
context.EmitLoadArguments(node.DefaultBody);
il.Br(doneLabel);
for (int index = 0; index < node.Cases.Count; ++index)
{
context.MarkLabelAndSurroundWithSP(caseLabels[index]);
context.EmitLoadArguments(node.Cases[index].Body);
if (index < node.Cases.Count - 1)
{
il.Br(doneLabel);
}
}
context.MarkLabelAndSurroundWithSP(doneLabel);
resultType = node.Type;
return(false);
}
public static bool Emit(Expression zarr, Expression zindex, EmittingContext context, GroboIL.Label returnDefaultValueLabel, ResultType whatReturn, bool extend, out Type resultType)
{
var arrayType = zarr.Type;
var isArray = arrayType.IsArray;
if (!isArray && !arrayType.IsList())
{
throw new InvalidOperationException("Unable to perform array index operator to type '" + arrayType + "'");
}
var itemType = isArray ? arrayType.GetElementType() : arrayType.GetGenericArguments()[0];
GroboIL il = context.Il;
EmittingContext.LocalHolder arrayIndex = null;
bool extendArray = extend && (CanAssign(zarr) || !isArray);
bool extendArrayElement = extend && itemType.IsClass;
var result = false;
if (!extendArray)
{
result |= ExpressionEmittersCollection.Emit(zarr, context, returnDefaultValueLabel, ResultType.Value, extend, out arrayType); // stack: [array]
if (context.Options.HasFlag(CompilerOptions.CheckNullReferences))
{
result = true;
il.Dup(); // stack: [array, array]
il.Brfalse(returnDefaultValueLabel); // if(array == null) goto returnDefaultValue; stack: [array]
}
EmitLoadIndex(zindex, context, arrayType); // stack: [array, arrayIndex]
if (context.Options.HasFlag(CompilerOptions.CheckArrayIndexes))
{
result = true;
arrayIndex = context.DeclareLocal(typeof(int));
il.Stloc(arrayIndex); // arrayIndex = index; stack: [array]
il.Dup(); // stack: [array, array]
if (isArray)
{
il.Ldlen(); // stack: [array, array.Length]
}
else
{
EmitLoadField(context, arrayType, arrayType.GetField("_size", BindingFlags.Instance | BindingFlags.NonPublic));
}
il.Ldloc(arrayIndex); // stack: [array, array.Length, arrayIndex]
il.Ble(returnDefaultValueLabel, false); // if(array.Length <= arrayIndex) goto returnDefaultValue; stack: [array]
il.Ldloc(arrayIndex); // stack: [array, arrayIndex]
il.Ldc_I4(0); // stack: [array, arrayIndex, 0]
il.Blt(returnDefaultValueLabel, false); // if(arrayIndex < 0) goto returnDefaultValue; stack: [array]
}
else if (extendArrayElement || !isArray)
{
arrayIndex = context.DeclareLocal(typeof(int));
il.Stloc(arrayIndex); // arrayIndex = index; stack: [array]
}
}
else
{
EmittingContext.LocalHolder arrayOwner = null;
switch (zarr.NodeType)
{
case ExpressionType.Parameter:
case ExpressionType.ArrayIndex:
case ExpressionType.Index:
Type type;
ExpressionEmittersCollection.Emit(zarr, context, returnDefaultValueLabel, ResultType.ByRefAll, true, out type); // stack: [ref array]
arrayOwner = context.DeclareLocal(type);
il.Dup(); // stack: [ref array, ref array]
il.Stloc(arrayOwner); // arrayOwner = ref array; stack: [ref array]
il.Ldind(zarr.Type); // stack: [array]
break;
case ExpressionType.MemberAccess:
var memberExpression = (MemberExpression)zarr;
Type memberType;
context.EmitMemberAccess(memberExpression, returnDefaultValueLabel, context.Options.HasFlag(CompilerOptions.CheckNullReferences), true, ResultType.ByRefValueTypesOnly, out memberType, out arrayOwner); // stack: [array]
break;
default:
throw new InvalidOperationException("Cannot extend array for expression with node type '" + zarr.NodeType + "'");
}
if (context.Options.HasFlag(CompilerOptions.CheckNullReferences))
{
il.Dup(); // stack: [array, array]
il.Brfalse(returnDefaultValueLabel); // if(array == null) goto returnDefaultValue; stack: [array]
}
EmitLoadIndex(zindex, context, arrayType);
result = true;
arrayIndex = context.DeclareLocal(typeof(int));
il.Stloc(arrayIndex); // arrayIndex = index; stack: [array]
il.Ldloc(arrayIndex); // stack: [array, arrayIndex]
il.Ldc_I4(0); // stack: [array, arrayIndex, 0]
il.Blt(returnDefaultValueLabel, false); // if(arrayIndex < 0) goto returnDefaultValue; stack: [array]
il.Dup(); // stack: [array, array]
if (isArray)
{
il.Ldlen(); // stack: [array, array.Length]
}
else
{
EmitLoadField(context, arrayType, arrayType.GetField("_size", BindingFlags.Instance | BindingFlags.NonPublic));
}
il.Ldloc(arrayIndex); // stack: [array, array.Length, arrayIndex]
var bigEnoughLabel = il.DefineLabel("bigEnough");
il.Bgt(bigEnoughLabel, false); // if(array.Length > arrayIndex) goto bigEnough; stack: [array]
using (var array = context.DeclareLocal(arrayType))
{
il.Stloc(array); // stack: []
if (!isArray)
{
EnsureCount(context, array, arrayIndex, arrayType);
}
else
{
il.Ldloca(array); // stack: [ref array]
il.Ldloc(arrayIndex); // stack: [ref array, arrayIndex]
il.Ldc_I4(1); // stack: [ref array, arrayIndex, 1]
il.Add(); // stack: [ref array, arrayIndex + 1]
il.Call(arrayResizeMethod.MakeGenericMethod(arrayType.GetElementType())); // Array.Resize(ref array, 1 + arrayIndex); stack: []
switch (zarr.NodeType)
{
case ExpressionType.Parameter:
case ExpressionType.ArrayIndex:
case ExpressionType.Index:
il.Ldloc(arrayOwner); // stack: [ref parameter]
il.Ldloc(array); // stack: [ref parameter, array]
il.Stind(arrayType); // parameter = array; stack: []
break;
case ExpressionType.MemberAccess:
var memberExpression = (MemberExpression)zarr;
if (memberExpression.Expression != null)
{
il.Ldloc(arrayOwner);
}
il.Ldloc(array);
switch (memberExpression.Member.MemberType)
{
case MemberTypes.Field:
il.Stfld((FieldInfo)memberExpression.Member);
break;
case MemberTypes.Property:
var propertyInfo = (PropertyInfo)memberExpression.Member;
var setter = propertyInfo.GetSetMethod(context.SkipVisibility);
if (setter == null)
{
throw new MissingMethodException(propertyInfo.ReflectedType.ToString(), "set_" + propertyInfo.Name);
}
il.Call(setter, memberExpression.Expression == null ? null : memberExpression.Expression.Type);
break;
default:
throw new NotSupportedException("Member type '" + memberExpression.Member.MemberType + "' is not supported");
}
break;
default:
throw new InvalidOperationException("Unable to assign array to an expression with node type '" + zarr.NodeType);
}
}
il.Ldloc(array);
context.MarkLabelAndSurroundWithSP(bigEnoughLabel);
}
}
if (!isArray)
{
// TODO: это злобно, лист при всех операциях меняет _version, а мы нет
EmitLoadField(context, arrayType, arrayType.GetField("_items", BindingFlags.Instance | BindingFlags.NonPublic));
arrayType = itemType.MakeArrayType();
}
if (extendArrayElement)
{
// stack: [array]
var constructor = itemType.GetConstructor(Type.EmptyTypes);
if (itemType.IsArray || constructor != null)
{
using (var array = context.DeclareLocal(arrayType))
{
il.Dup(); // stack: [array, array]
il.Stloc(array); // stack: [array]
il.Ldloc(arrayIndex); // stack: [array, arrayIndex]
il.Ldelem(itemType); // stack: [array[arrayIndex]]
var elementIsNotNullLabel = il.DefineLabel("elementIsNotNull");
il.Brtrue(elementIsNotNullLabel);
il.Ldloc(array);
il.Ldloc(arrayIndex);
context.Create(itemType);
il.Stelem(itemType);
context.MarkLabelAndSurroundWithSP(elementIsNotNullLabel);
il.Ldloc(array);
}
}
}
if (arrayIndex != null)
{
il.Ldloc(arrayIndex);
arrayIndex.Dispose();
}
switch (whatReturn)
{
case ResultType.ByRefAll:
il.Ldelema(itemType);
resultType = itemType.MakeByRefType();
break;
case ResultType.ByRefValueTypesOnly:
if (itemType.IsValueType)
{
il.Ldelema(itemType);
resultType = itemType.MakeByRefType();
}
else
{
il.Ldelem(itemType); // stack: [array[arrayIndex]]
resultType = itemType;
}
break;
default:
il.Ldelem(itemType); // stack: [array[arrayIndex]]
resultType = itemType;
break;
}
return(result);
}
