You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
565 lines
26 KiB
565 lines
26 KiB
// Copyright (c) 2014 Daniel Grunwald
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
|
|
// software and associated documentation files (the "Software"), to deal in the Software
|
|
// without restriction, including without limitation the rights to use, copy, modify, merge,
|
|
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
|
|
// to whom the Software is furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all copies or
|
|
// substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
|
|
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
|
|
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using System.Linq;
|
|
using ICSharpCode.Decompiler.CSharp.Resolver;
|
|
using ICSharpCode.Decompiler.CSharp.Syntax;
|
|
using ICSharpCode.Decompiler.IL;
|
|
using ICSharpCode.Decompiler.Semantics;
|
|
using ICSharpCode.Decompiler.TypeSystem;
|
|
using ICSharpCode.Decompiler.TypeSystem.Implementation;
|
|
using ICSharpCode.Decompiler.Util;
|
|
|
|
namespace ICSharpCode.Decompiler.CSharp
|
|
{
|
|
struct CallBuilder
|
|
{
|
|
struct ExpectedTargetDetails
|
|
{
|
|
public OpCode CallOpCode;
|
|
public bool NeedsBoxingConversion;
|
|
}
|
|
|
|
readonly DecompilerSettings settings;
|
|
readonly ExpressionBuilder expressionBuilder;
|
|
readonly CSharpResolver resolver;
|
|
readonly IDecompilerTypeSystem typeSystem;
|
|
|
|
public CallBuilder(ExpressionBuilder expressionBuilder, IDecompilerTypeSystem typeSystem, DecompilerSettings settings)
|
|
{
|
|
this.expressionBuilder = expressionBuilder;
|
|
this.resolver = expressionBuilder.resolver;
|
|
this.settings = settings;
|
|
this.typeSystem = typeSystem;
|
|
}
|
|
|
|
public TranslatedExpression Build(CallInstruction inst)
|
|
{
|
|
if (inst is NewObj newobj && IL.Transforms.DelegateConstruction.IsDelegateConstruction(newobj, true)) {
|
|
return HandleDelegateConstruction(newobj);
|
|
}
|
|
return Build(inst.OpCode, inst.Method, inst.Arguments, inst.ConstrainedTo).WithILInstruction(inst);
|
|
}
|
|
|
|
public ExpressionWithResolveResult Build(OpCode callOpCode, IMethod method, IReadOnlyList<ILInstruction> callArguments,
|
|
IType constrainedTo = null)
|
|
{
|
|
// Used for Call, CallVirt and NewObj
|
|
var expectedTargetDetails = new ExpectedTargetDetails {
|
|
CallOpCode = callOpCode
|
|
};
|
|
TranslatedExpression target;
|
|
if (callOpCode == OpCode.NewObj) {
|
|
target = default(TranslatedExpression); // no target
|
|
} else {
|
|
target = expressionBuilder.TranslateTarget(method, callArguments.FirstOrDefault(), callOpCode == OpCode.Call, constrainedTo);
|
|
if (callOpCode == OpCode.CallVirt
|
|
&& constrainedTo == null
|
|
&& target.Expression is CastExpression cast
|
|
&& target.ResolveResult is ConversionResolveResult conversion
|
|
&& target.Type.IsKnownType(KnownTypeCode.Object)
|
|
&& conversion.Conversion.IsBoxingConversion)
|
|
{
|
|
// boxing conversion on call target?
|
|
// let's see if we can make that implicit:
|
|
target = target.UnwrapChild(cast.Expression);
|
|
// we'll need to make sure the boxing effect is preserved
|
|
expectedTargetDetails.NeedsBoxingConversion = true;
|
|
}
|
|
}
|
|
|
|
int firstParamIndex = (method.IsStatic || callOpCode == OpCode.NewObj) ? 0 : 1;
|
|
|
|
// Translate arguments to the expected parameter types
|
|
var arguments = new List<TranslatedExpression>(method.Parameters.Count);
|
|
Debug.Assert(callArguments.Count == firstParamIndex + method.Parameters.Count);
|
|
var expectedParameters = method.Parameters.ToList();
|
|
bool isExpandedForm = false;
|
|
for (int i = 0; i < method.Parameters.Count; i++) {
|
|
var parameter = expectedParameters[i];
|
|
var arg = expressionBuilder.Translate(callArguments[firstParamIndex + i], parameter.Type);
|
|
if (parameter.IsParams && i + 1 == method.Parameters.Count) {
|
|
// Parameter is marked params
|
|
// If the argument is an array creation, inline all elements into the call and add missing default values.
|
|
// Otherwise handle it normally.
|
|
if (arg.ResolveResult is ArrayCreateResolveResult acrr &&
|
|
acrr.SizeArguments.Count == 1 &&
|
|
acrr.SizeArguments[0].IsCompileTimeConstant &&
|
|
acrr.SizeArguments[0].ConstantValue is int length) {
|
|
var expandedParameters = expectedParameters.Take(expectedParameters.Count - 1).ToList();
|
|
var expandedArguments = new List<TranslatedExpression>(arguments);
|
|
if (length > 0) {
|
|
var arrayElements = ((ArrayCreateExpression)arg.Expression).Initializer.Elements.ToArray();
|
|
var elementType = ((ArrayType)acrr.Type).ElementType;
|
|
for (int j = 0; j < length; j++) {
|
|
expandedParameters.Add(new DefaultParameter(elementType, parameter.Name + j));
|
|
if (j < arrayElements.Length)
|
|
expandedArguments.Add(new TranslatedExpression(arrayElements[j]));
|
|
else
|
|
expandedArguments.Add(expressionBuilder.GetDefaultValueExpression(elementType).WithoutILInstruction());
|
|
}
|
|
}
|
|
if (IsUnambiguousCall(expectedTargetDetails, method, target.ResolveResult, Empty<IType>.Array, expandedArguments) == OverloadResolutionErrors.None) {
|
|
isExpandedForm = true;
|
|
expectedParameters = expandedParameters;
|
|
arguments = expandedArguments.SelectList(a => new TranslatedExpression(a.Expression.Detach()));
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
arguments.Add(arg.ConvertTo(parameter.Type, expressionBuilder, allowImplicitConversion: true));
|
|
|
|
if (parameter.IsOut && arguments[i].Expression is DirectionExpression dirExpr && arguments[i].ResolveResult is ByReferenceResolveResult brrr) {
|
|
dirExpr.FieldDirection = FieldDirection.Out;
|
|
dirExpr.RemoveAnnotations<ByReferenceResolveResult>();
|
|
if (brrr.ElementResult == null)
|
|
brrr = new ByReferenceResolveResult(brrr.ElementType, isOut: true);
|
|
else
|
|
brrr = new ByReferenceResolveResult(brrr.ElementResult, isOut: true);
|
|
dirExpr.AddAnnotation(brrr);
|
|
arguments[i] = new TranslatedExpression(dirExpr);
|
|
}
|
|
}
|
|
|
|
if (method is VarArgInstanceMethod) {
|
|
int regularParameterCount = ((VarArgInstanceMethod)method).RegularParameterCount;
|
|
var argListArg = new UndocumentedExpression();
|
|
argListArg.UndocumentedExpressionType = UndocumentedExpressionType.ArgList;
|
|
int paramIndex = regularParameterCount;
|
|
var builder = expressionBuilder;
|
|
argListArg.Arguments.AddRange(arguments.Skip(regularParameterCount).Select(arg => arg.ConvertTo(expectedParameters[paramIndex++].Type, builder).Expression));
|
|
var argListRR = new ResolveResult(SpecialType.ArgList);
|
|
arguments = arguments.Take(regularParameterCount)
|
|
.Concat(new[] { argListArg.WithoutILInstruction().WithRR(argListRR) }).ToList();
|
|
method = (IMethod)method.MemberDefinition;
|
|
expectedParameters = method.Parameters.ToList();
|
|
}
|
|
|
|
var argumentResolveResults = arguments.Select(arg => arg.ResolveResult).ToList();
|
|
|
|
ResolveResult rr = new CSharpInvocationResolveResult(target.ResolveResult, method, argumentResolveResults, isExpandedForm: isExpandedForm);
|
|
|
|
if (callOpCode == OpCode.NewObj) {
|
|
if (settings.AnonymousTypes && method.DeclaringType.IsAnonymousType()) {
|
|
var argumentExpressions = arguments.SelectArray(arg => arg.Expression);
|
|
AnonymousTypeCreateExpression atce = new AnonymousTypeCreateExpression();
|
|
if (CanInferAnonymousTypePropertyNamesFromArguments(argumentExpressions, expectedParameters)) {
|
|
atce.Initializers.AddRange(argumentExpressions);
|
|
} else {
|
|
for (int i = 0; i < argumentExpressions.Length; i++) {
|
|
atce.Initializers.Add(
|
|
new NamedExpression {
|
|
Name = expectedParameters[i].Name,
|
|
Expression = arguments[i].ConvertTo(expectedParameters[i].Type, expressionBuilder)
|
|
});
|
|
}
|
|
}
|
|
return atce
|
|
.WithRR(rr);
|
|
} else {
|
|
if (IsUnambiguousCall(expectedTargetDetails, method, null, Empty<IType>.Array, arguments) != OverloadResolutionErrors.None) {
|
|
for (int i = 0; i < arguments.Count; i++) {
|
|
if (settings.AnonymousTypes && expectedParameters[i].Type.ContainsAnonymousType()) {
|
|
if (arguments[i].Expression is LambdaExpression lambda) {
|
|
ModifyReturnTypeOfLambda(lambda);
|
|
}
|
|
} else {
|
|
arguments[i] = arguments[i].ConvertTo(expectedParameters[i].Type, expressionBuilder);
|
|
}
|
|
}
|
|
}
|
|
return new ObjectCreateExpression(expressionBuilder.ConvertType(method.DeclaringType), arguments.SelectArray(arg => arg.Expression))
|
|
.WithRR(rr);
|
|
}
|
|
} else {
|
|
int allowedParamCount = (method.ReturnType.IsKnownType(KnownTypeCode.Void) ? 1 : 0);
|
|
if (method.IsAccessor && (method.AccessorOwner.SymbolKind == SymbolKind.Indexer || expectedParameters.Count == allowedParamCount)) {
|
|
return HandleAccessorCall(expectedTargetDetails, method, target, arguments.ToList());
|
|
} else if (method.Name == "Invoke" && method.DeclaringType.Kind == TypeKind.Delegate && !IsNullConditional(target)) {
|
|
return new InvocationExpression(target, arguments.Select(arg => arg.Expression)).WithRR(rr);
|
|
} else if (IsDelegateEqualityComparison(method, arguments)) {
|
|
return HandleDelegateEqualityComparison(method, arguments)
|
|
.WithRR(rr);
|
|
} else if (method.IsOperator && method.Name == "op_Implicit" && arguments.Count == 1) {
|
|
return HandleImplicitConversion(method, arguments[0]);
|
|
} else {
|
|
bool requireTypeArguments = false;
|
|
bool requireTarget;
|
|
if (expressionBuilder.HidesVariableWithName(method.Name)) {
|
|
requireTarget = true;
|
|
} else {
|
|
if (method.IsStatic)
|
|
requireTarget = !expressionBuilder.IsCurrentOrContainingType(method.DeclaringTypeDefinition) || method.Name == ".cctor";
|
|
else
|
|
requireTarget = !(target.Expression is ThisReferenceExpression) || method.Name == ".ctor";
|
|
}
|
|
bool targetCasted = false;
|
|
bool argumentsCasted = false;
|
|
IType[] typeArguments = Empty<IType>.Array;
|
|
var targetResolveResult = requireTarget ? target.ResolveResult : null;
|
|
OverloadResolutionErrors errors;
|
|
while ((errors = IsUnambiguousCall(expectedTargetDetails, method, targetResolveResult, typeArguments, arguments)) != OverloadResolutionErrors.None) {
|
|
switch (errors) {
|
|
case OverloadResolutionErrors.TypeInferenceFailed:
|
|
case OverloadResolutionErrors.WrongNumberOfTypeArguments:
|
|
if (requireTypeArguments) goto default;
|
|
requireTypeArguments = true;
|
|
typeArguments = method.TypeArguments.ToArray();
|
|
continue;
|
|
default:
|
|
// TODO : implement some more intelligent algorithm that decides which of these fixes (cast args, add target, cast target, add type args)
|
|
// is best in this case. Additionally we should not cast all arguments at once, but step-by-step try to add only a minimal number of casts.
|
|
if (!argumentsCasted) {
|
|
argumentsCasted = true;
|
|
for (int i = 0; i < arguments.Count; i++) {
|
|
if (settings.AnonymousTypes && expectedParameters[i].Type.ContainsAnonymousType()) {
|
|
if (arguments[i].Expression is LambdaExpression lambda) {
|
|
ModifyReturnTypeOfLambda(lambda);
|
|
}
|
|
} else {
|
|
arguments[i] = arguments[i].ConvertTo(expectedParameters[i].Type, expressionBuilder);
|
|
}
|
|
}
|
|
} else if (!requireTarget) {
|
|
requireTarget = true;
|
|
targetResolveResult = target.ResolveResult;
|
|
} else if (!targetCasted) {
|
|
targetCasted = true;
|
|
target = target.ConvertTo(method.DeclaringType, expressionBuilder);
|
|
targetResolveResult = target.ResolveResult;
|
|
} else if (!requireTypeArguments) {
|
|
requireTypeArguments = true;
|
|
typeArguments = method.TypeArguments.ToArray();
|
|
} else {
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
Expression targetExpr;
|
|
string methodName = method.Name;
|
|
AstNodeCollection<AstType> typeArgumentList;
|
|
if (requireTarget) {
|
|
targetExpr = new MemberReferenceExpression(target.Expression, methodName);
|
|
typeArgumentList = ((MemberReferenceExpression)targetExpr).TypeArguments;
|
|
|
|
// HACK : convert this.Dispose() to ((IDisposable)this).Dispose(), if Dispose is an explicitly implemented interface method.
|
|
if (method.IsExplicitInterfaceImplementation && target.Expression is ThisReferenceExpression) {
|
|
var castExpression = new CastExpression(expressionBuilder.ConvertType(method.ImplementedInterfaceMembers[0].DeclaringType), target.Expression);
|
|
methodName = method.ImplementedInterfaceMembers[0].Name;
|
|
targetExpr = new MemberReferenceExpression(castExpression, methodName);
|
|
typeArgumentList = ((MemberReferenceExpression)targetExpr).TypeArguments;
|
|
}
|
|
} else {
|
|
targetExpr = new IdentifierExpression(methodName);
|
|
typeArgumentList = ((IdentifierExpression)targetExpr).TypeArguments;
|
|
}
|
|
|
|
if (requireTypeArguments && (!settings.AnonymousTypes || !method.TypeArguments.Any(a => a.ContainsAnonymousType())))
|
|
typeArgumentList.AddRange(method.TypeArguments.Select(expressionBuilder.ConvertType));
|
|
var argumentExpressions = arguments.Select(arg => arg.Expression);
|
|
return new InvocationExpression(targetExpr, argumentExpressions).WithRR(rr);
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool IsNullConditional(Expression expr)
|
|
{
|
|
return expr is UnaryOperatorExpression uoe && uoe.Operator == UnaryOperatorType.NullConditional;
|
|
}
|
|
|
|
private void ModifyReturnTypeOfLambda(LambdaExpression lambda)
|
|
{
|
|
var resolveResult = (DecompiledLambdaResolveResult)lambda.GetResolveResult();
|
|
if (lambda.Body is Expression exprBody)
|
|
lambda.Body = new TranslatedExpression(exprBody.Detach()).ConvertTo(resolveResult.ReturnType, expressionBuilder);
|
|
else
|
|
ModifyReturnStatementInsideLambda(resolveResult.ReturnType, lambda);
|
|
resolveResult.InferredReturnType = resolveResult.ReturnType;
|
|
}
|
|
|
|
private void ModifyReturnStatementInsideLambda(IType returnType, AstNode parent)
|
|
{
|
|
foreach (var child in parent.Children) {
|
|
if (child is LambdaExpression || child is AnonymousMethodExpression)
|
|
continue;
|
|
if (child is ReturnStatement ret) {
|
|
ret.Expression = new TranslatedExpression(ret.Expression.Detach()).ConvertTo(returnType, expressionBuilder);
|
|
continue;
|
|
}
|
|
ModifyReturnStatementInsideLambda(returnType, child);
|
|
}
|
|
}
|
|
|
|
private bool IsDelegateEqualityComparison(IMethod method, IList<TranslatedExpression> arguments)
|
|
{
|
|
// Comparison on a delegate type is a C# builtin operator
|
|
// that compiles down to a Delegate.op_Equality call.
|
|
// We handle this as a special case to avoid inserting a cast to System.Delegate.
|
|
return method.IsOperator
|
|
&& method.DeclaringType.IsKnownType(KnownTypeCode.Delegate)
|
|
&& (method.Name == "op_Equality" || method.Name == "op_Inequality")
|
|
&& arguments.Count == 2
|
|
&& arguments[0].Type.Kind == TypeKind.Delegate
|
|
&& arguments[1].Type.Equals(arguments[0].Type);
|
|
}
|
|
|
|
private Expression HandleDelegateEqualityComparison(IMethod method, IList<TranslatedExpression> arguments)
|
|
{
|
|
return new BinaryOperatorExpression(
|
|
arguments[0],
|
|
method.Name == "op_Equality" ? BinaryOperatorType.Equality : BinaryOperatorType.InEquality,
|
|
arguments[1]
|
|
);
|
|
}
|
|
|
|
private ExpressionWithResolveResult HandleImplicitConversion(IMethod method, TranslatedExpression argument)
|
|
{
|
|
var conversions = CSharpConversions.Get(expressionBuilder.compilation);
|
|
IType targetType = method.ReturnType;
|
|
var conv = conversions.ImplicitConversion(argument.Type, targetType);
|
|
if (!(conv.IsUserDefined && conv.Method.Equals(method))) {
|
|
// implicit conversion to targetType isn't directly possible, so first insert a cast to the argument type
|
|
argument = argument.ConvertTo(method.Parameters[0].Type, expressionBuilder);
|
|
conv = conversions.ImplicitConversion(argument.Type, targetType);
|
|
}
|
|
return new CastExpression(expressionBuilder.ConvertType(targetType), argument.Expression)
|
|
.WithRR(new ConversionResolveResult(targetType, argument.ResolveResult, conv));
|
|
}
|
|
|
|
OverloadResolutionErrors IsUnambiguousCall(ExpectedTargetDetails expectedTargetDetails, IMethod method,
|
|
ResolveResult target, IType[] typeArguments, IList<TranslatedExpression> arguments)
|
|
{
|
|
var lookup = new MemberLookup(resolver.CurrentTypeDefinition, resolver.CurrentTypeDefinition.ParentAssembly);
|
|
var or = new OverloadResolution(resolver.Compilation, arguments.SelectArray(a => a.ResolveResult), typeArguments: typeArguments);
|
|
if (expectedTargetDetails.CallOpCode == OpCode.NewObj) {
|
|
foreach (IMethod ctor in method.DeclaringType.GetConstructors()) {
|
|
if (lookup.IsAccessible(ctor, allowProtectedAccess: resolver.CurrentTypeDefinition == method.DeclaringTypeDefinition)) {
|
|
or.AddCandidate(ctor);
|
|
}
|
|
}
|
|
} else if (target == null) {
|
|
var result = resolver.ResolveSimpleName(method.Name, typeArguments, isInvocationTarget: true) as MethodGroupResolveResult;
|
|
if (result == null)
|
|
return OverloadResolutionErrors.AmbiguousMatch;
|
|
or.AddMethodLists(result.MethodsGroupedByDeclaringType.ToArray());
|
|
} else {
|
|
var result = lookup.Lookup(target, method.Name, EmptyList<IType>.Instance, isInvocation: true) as MethodGroupResolveResult;
|
|
if (result == null)
|
|
return OverloadResolutionErrors.AmbiguousMatch;
|
|
or.AddMethodLists(result.MethodsGroupedByDeclaringType.ToArray());
|
|
}
|
|
if (or.BestCandidateErrors != OverloadResolutionErrors.None)
|
|
return or.BestCandidateErrors;
|
|
if (!IsAppropriateCallTarget(expectedTargetDetails, method, or.GetBestCandidateWithSubstitutedTypeArguments()))
|
|
return OverloadResolutionErrors.AmbiguousMatch;
|
|
return OverloadResolutionErrors.None;
|
|
}
|
|
|
|
static bool CanInferAnonymousTypePropertyNamesFromArguments(IList<Expression> args, IList<IParameter> parameters)
|
|
{
|
|
for (int i = 0; i < args.Count; i++) {
|
|
string inferredName;
|
|
if (args[i] is IdentifierExpression)
|
|
inferredName = ((IdentifierExpression)args[i]).Identifier;
|
|
else if (args[i] is MemberReferenceExpression)
|
|
inferredName = ((MemberReferenceExpression)args[i]).MemberName;
|
|
else
|
|
inferredName = null;
|
|
|
|
if (inferredName != parameters[i].Name) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool IsUnambiguousAccess(ExpectedTargetDetails expectedTargetDetails, ResolveResult target, IMethod method)
|
|
{
|
|
if (target == null) {
|
|
var result = resolver.ResolveSimpleName(method.AccessorOwner.Name, EmptyList<IType>.Instance, isInvocationTarget: false) as MemberResolveResult;
|
|
return !(result == null || result.IsError || !IsAppropriateCallTarget(expectedTargetDetails, method.AccessorOwner, result.Member));
|
|
} else {
|
|
var lookup = new MemberLookup(resolver.CurrentTypeDefinition, resolver.CurrentTypeDefinition.ParentAssembly);
|
|
var result = lookup.Lookup(target, method.AccessorOwner.Name, EmptyList<IType>.Instance, isInvocation: false) as MemberResolveResult;
|
|
return !(result == null || result.IsError || !IsAppropriateCallTarget(expectedTargetDetails, method.AccessorOwner, result.Member));
|
|
}
|
|
}
|
|
|
|
ExpressionWithResolveResult HandleAccessorCall(ExpectedTargetDetails expectedTargetDetails, IMethod method, TranslatedExpression target, IList<TranslatedExpression> arguments)
|
|
{
|
|
bool requireTarget = expressionBuilder.HidesVariableWithName(method.AccessorOwner.Name)
|
|
|| (method.IsStatic ? !expressionBuilder.IsCurrentOrContainingType(method.DeclaringTypeDefinition) : !(target.Expression is ThisReferenceExpression));
|
|
bool targetCasted = false;
|
|
var targetResolveResult = requireTarget ? target.ResolveResult : null;
|
|
|
|
while (!IsUnambiguousAccess(expectedTargetDetails, targetResolveResult, method)) {
|
|
if (!requireTarget) {
|
|
requireTarget = true;
|
|
targetResolveResult = target.ResolveResult;
|
|
} else if (!targetCasted) {
|
|
targetCasted = true;
|
|
target = target.ConvertTo(method.AccessorOwner.DeclaringType, expressionBuilder);
|
|
targetResolveResult = target.ResolveResult;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
var rr = new MemberResolveResult(target.ResolveResult, method.AccessorOwner);
|
|
|
|
if (method.ReturnType.IsKnownType(KnownTypeCode.Void)) {
|
|
var value = arguments.Last();
|
|
arguments.Remove(value);
|
|
TranslatedExpression expr;
|
|
|
|
if (arguments.Count != 0) {
|
|
expr = new IndexerExpression(target.Expression, arguments.Select(a => a.Expression))
|
|
.WithoutILInstruction().WithRR(rr);
|
|
} else if (requireTarget) {
|
|
expr = new MemberReferenceExpression(target.Expression, method.AccessorOwner.Name)
|
|
.WithoutILInstruction().WithRR(rr);
|
|
} else {
|
|
expr = new IdentifierExpression(method.AccessorOwner.Name)
|
|
.WithoutILInstruction().WithRR(rr);
|
|
}
|
|
|
|
var op = AssignmentOperatorType.Assign;
|
|
var parentEvent = method.AccessorOwner as IEvent;
|
|
if (parentEvent != null) {
|
|
if (method.Equals(parentEvent.AddAccessor)) {
|
|
op = AssignmentOperatorType.Add;
|
|
}
|
|
if (method.Equals(parentEvent.RemoveAccessor)) {
|
|
op = AssignmentOperatorType.Subtract;
|
|
}
|
|
}
|
|
return new AssignmentExpression(expr, op, value.Expression).WithRR(new TypeResolveResult(method.AccessorOwner.ReturnType));
|
|
} else {
|
|
if (arguments.Count != 0) {
|
|
return new IndexerExpression(target.Expression, arguments.Select(a => a.Expression))
|
|
.WithoutILInstruction().WithRR(rr);
|
|
} else if (requireTarget) {
|
|
return new MemberReferenceExpression(target.Expression, method.AccessorOwner.Name)
|
|
.WithoutILInstruction().WithRR(rr);
|
|
} else {
|
|
return new IdentifierExpression(method.AccessorOwner.Name)
|
|
.WithoutILInstruction().WithRR(rr);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool IsAppropriateCallTarget(ExpectedTargetDetails expectedTargetDetails, IMember expectedTarget, IMember actualTarget)
|
|
{
|
|
if (expectedTarget.Equals(actualTarget))
|
|
return true;
|
|
|
|
if (expectedTargetDetails.CallOpCode == OpCode.CallVirt && actualTarget.IsOverride) {
|
|
if (expectedTargetDetails.NeedsBoxingConversion && actualTarget.DeclaringType.IsReferenceType != true)
|
|
return false;
|
|
foreach (var possibleTarget in InheritanceHelper.GetBaseMembers(actualTarget, false)) {
|
|
if (expectedTarget.Equals(possibleTarget))
|
|
return true;
|
|
if (!possibleTarget.IsOverride)
|
|
break;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
TranslatedExpression HandleDelegateConstruction(CallInstruction inst)
|
|
{
|
|
ILInstruction func = inst.Arguments[1];
|
|
IMethod method;
|
|
switch (func.OpCode) {
|
|
case OpCode.LdFtn:
|
|
method = ((LdFtn)func).Method;
|
|
break;
|
|
case OpCode.LdVirtFtn:
|
|
method = ((LdVirtFtn)func).Method;
|
|
break;
|
|
default:
|
|
throw new ArgumentException($"Unknown instruction type: {func.OpCode}");
|
|
}
|
|
var invokeMethod = inst.Method.DeclaringType.GetDelegateInvokeMethod();
|
|
TranslatedExpression target;
|
|
IType targetType;
|
|
bool requireTarget;
|
|
if (method.IsExtensionMethod && invokeMethod != null && method.Parameters.Count - 1 == invokeMethod.Parameters.Count) {
|
|
targetType = method.Parameters[0].Type;
|
|
target = expressionBuilder.Translate(inst.Arguments[0], targetType);
|
|
requireTarget = true;
|
|
} else {
|
|
targetType = method.DeclaringType;
|
|
target = expressionBuilder.TranslateTarget(method, inst.Arguments[0], func.OpCode == OpCode.LdFtn);
|
|
requireTarget = expressionBuilder.HidesVariableWithName(method.Name)
|
|
|| (method.IsStatic ? !expressionBuilder.IsCurrentOrContainingType(method.DeclaringTypeDefinition) : !(target.Expression is ThisReferenceExpression));
|
|
}
|
|
var expectedTargetDetails = new ExpectedTargetDetails {
|
|
CallOpCode = inst.OpCode
|
|
};
|
|
bool needsCast = false;
|
|
ResolveResult result = null;
|
|
if (!requireTarget) {
|
|
result = resolver.ResolveSimpleName(method.Name, method.TypeArguments, isInvocationTarget: false);
|
|
requireTarget = (!(result is MethodGroupResolveResult mgrr) || mgrr.IsError || !mgrr.Methods.Any() || mgrr.Methods.Skip(1).Any() || !IsAppropriateCallTarget(expectedTargetDetails, method, mgrr.Methods.First()));
|
|
}
|
|
MemberLookup lookup = null;
|
|
if (requireTarget) {
|
|
lookup = new MemberLookup(resolver.CurrentTypeDefinition, resolver.CurrentTypeDefinition.ParentAssembly);
|
|
var or = new OverloadResolution(resolver.Compilation, method.Parameters.SelectArray(p => new TypeResolveResult(p.Type)));
|
|
var rr = lookup.Lookup(target.ResolveResult, method.Name, method.TypeArguments, false) ;
|
|
needsCast = true;
|
|
result = rr;
|
|
if (rr is MethodGroupResolveResult mgrr) {
|
|
or.AddMethodLists(mgrr.MethodsGroupedByDeclaringType.ToArray());
|
|
needsCast = (or.BestCandidateErrors != OverloadResolutionErrors.None || !IsAppropriateCallTarget(expectedTargetDetails, method, or.BestCandidate));
|
|
}
|
|
}
|
|
if (needsCast) {
|
|
Debug.Assert(requireTarget);
|
|
target = target.ConvertTo(targetType, expressionBuilder);
|
|
result = lookup.Lookup(target.ResolveResult, method.Name, method.TypeArguments, false);
|
|
}
|
|
Expression targetExpression;
|
|
if (requireTarget) {
|
|
var mre = new MemberReferenceExpression(target, method.Name);
|
|
mre.TypeArguments.AddRange(method.TypeArguments.Select(expressionBuilder.ConvertType));
|
|
mre.WithRR(result);
|
|
targetExpression = mre;
|
|
} else {
|
|
var ide = new IdentifierExpression(method.Name)
|
|
.WithRR(result);
|
|
targetExpression = ide;
|
|
}
|
|
var oce = new ObjectCreateExpression(expressionBuilder.ConvertType(inst.Method.DeclaringType), targetExpression)
|
|
.WithILInstruction(inst)
|
|
.WithRR(new ConversionResolveResult(
|
|
inst.Method.DeclaringType,
|
|
new MemberResolveResult(target.ResolveResult, method),
|
|
Conversion.MethodGroupConversion(method, func.OpCode == OpCode.LdVirtFtn, false)));
|
|
return oce;
|
|
}
|
|
}
|
|
}
|