public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
var rewritten = (BoundObjectCreationExpression)base.VisitObjectCreationExpression(node);
if (
!TypeSymbol.Equals(rewritten.Type, node.Type, TypeCompareKind.ConsiderEverything2) &&
(object)node.Constructor != null
)
{
MethodSymbol ctor = VisitMethodSymbol(node.Constructor);
rewritten = rewritten.Update(
ctor,
rewritten.Arguments,
rewritten.ArgumentNamesOpt,
rewritten.ArgumentRefKindsOpt,
rewritten.Expanded,
rewritten.ArgsToParamsOpt,
rewritten.DefaultArguments,
rewritten.ConstantValueOpt,
rewritten.InitializerExpressionOpt,
rewritten.Type
);
}
return(rewritten);
}
public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
Debug.Assert(node != null);
// Start by rewriting the arguments:
var rewrittenArguments = VisitList(node.Arguments);
// If the mapping from arguments to parameters is perfectly in order, no complex rewriting is needed.
if (node.ArgsToParamsOpt.IsNull && !node.Expanded)
{
return(node.Update(node.ConstructorOpt, rewrittenArguments, node.ArgumentNamesOpt, node.ArgumentRefKindsOpt, node.Expanded, node.ArgsToParamsOpt, node.ConstantValueOpt, node.Type));
}
var argumentRefKinds = node.ArgumentRefKindsOpt;
ReadOnlyArray <LocalSymbol> temps;
Debug.Assert(node.ConstructorOpt != null, "rewriting arguments when there is no constructor");
RewriteArguments(node.ConstructorOpt,
node.Expanded,
node.ArgsToParamsOpt,
ref argumentRefKinds,
ref rewrittenArguments,
out temps);
if (temps.IsNullOrEmpty)
{
return(node.Update(
node.ConstructorOpt,
rewrittenArguments,
ReadOnlyArray <string> .Null,
argumentRefKinds,
false,
ReadOnlyArray <int> .Null,
node.ConstantValueOpt,
node.Type));
}
else
{
return(new BoundSequence(
null,
null,
temps,
ReadOnlyArray <BoundExpression> .Empty,
new BoundObjectCreationExpression(
node.Syntax,
node.SyntaxTree,
node.ConstructorOpt,
rewrittenArguments,
ReadOnlyArray <string> .Null,
argumentRefKinds,
false,
ReadOnlyArray <int> .Null,
node.ConstantValueOpt,
node.Type),
node.Type
));
}
}
public override object VisitObjectCreationExpression(BoundObjectCreationExpression node, object arg)
{
foreach (var e in node.Arguments)
{
VisitExpression(e);
}
return(null);
}
internal void Parse(BoundObjectCreationExpression boundObjectCreationExpression)
{
base.Parse(boundObjectCreationExpression);
Method = boundObjectCreationExpression.Constructor;
if (boundObjectCreationExpression.InitializerExpressionOpt != null)
{
this.InitializerExpressionOpt = Deserialize(boundObjectCreationExpression.InitializerExpressionOpt) as Expression;
}
foreach (var expression in boundObjectCreationExpression.Arguments)
{
var argument = Deserialize(expression) as Expression;
Debug.Assert(argument != null);
Arguments.Add(argument);
}
}
public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
var rewritten = (BoundObjectCreationExpression)base.VisitObjectCreationExpression(node);
if (rewritten.Type != node.Type && (object)node.Constructor != null)
{
MethodSymbol ctor = VisitMethodSymbol(node.Constructor);
rewritten = rewritten.Update(
ctor,
rewritten.Arguments,
rewritten.ArgumentNamesOpt,
rewritten.ArgumentRefKindsOpt,
rewritten.Expanded,
rewritten.ArgsToParamsOpt,
rewritten.ConstantValueOpt,
rewritten.InitializerExpressionOpt,
rewritten.BinderOpt,
rewritten.Type);
}
return rewritten;
}
private void EmitObjectCreationExpression(BoundObjectCreationExpression expression, bool used)
{
MethodSymbol constructor = expression.Constructor;
if (constructor.IsDefaultValueTypeConstructor())
{
EmitInitObj(expression.Type, used, expression.Syntax);
}
else
{
if (!used &&
expression.Constructor.OriginalDefinition == _module.Compilation.GetSpecialTypeMember(SpecialMember.System_Nullable_T__ctor))
{
// creating nullable has no side-effects, so we will just evaluate the arg
EmitExpression(expression.Arguments[0], used: false);
}
else
{
EmitArguments(expression.Arguments, constructor.Parameters);
var stackAdjustment = GetObjCreationStackBehavior(expression);
_builder.EmitOpCode(ILOpCode.Newobj, stackAdjustment);
// for variadic ctors emit expanded ctor token
EmitSymbolToken(constructor, expression.Syntax,
constructor.IsVararg ? (BoundArgListOperator)expression.Arguments[expression.Arguments.Length - 1] : null);
EmitPopIfUnused(used);
}
}
}
private static int GetObjCreationStackBehavior(BoundObjectCreationExpression objCreation)
{
int stack = 0;
// Constructor puts the return value on the stack.
stack += 1;
if (objCreation.Constructor.IsVararg)
{
// Constructor pops all the arguments, fixed and variadic.
int fixedArgCount = objCreation.Arguments.Length - 1;
int varArgCount = ((BoundArgListOperator)objCreation.Arguments[fixedArgCount]).Arguments.Length;
stack -= fixedArgCount;
stack -= varArgCount;
}
else
{
// Constructor pops all the arguments.
stack -= objCreation.Arguments.Length;
}
return stack;
}
public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
var constructor = node.Constructor;
var rewrittenArguments = VisitArguments(node.Arguments, constructor.Parameters);
Debug.Assert(node.InitializerExpressionOpt == null);
return node.Update(constructor, rewrittenArguments, node.ArgumentNamesOpt, node.ArgumentRefKindsOpt,
node.Expanded, node.ArgsToParamsOpt, node.ConstantValue, null, node.Type);
}
public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
ImmutableArray<BoundExpression> arguments = this.VisitList(node.Arguments);
Debug.Assert(node.InitializerExpressionOpt == null);
TypeSymbol type = this.VisitType(node.Type);
return node.Update(node.Constructor, arguments, node.ArgumentNamesOpt, node.ArgumentRefKindsOpt, node.Expanded, node.ArgsToParamsOpt, node.ConstantValueOpt, null, type);
}
public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
var rewritten = (BoundObjectCreationExpression)base.VisitObjectCreationExpression(node);
if (rewritten.Type != node.Type && (object)node.Constructor != null)
{
MethodSymbol ctor = VisitMethodSymbol(node.Constructor);
rewritten = rewritten.Update(
ctor,
rewritten.Arguments,
rewritten.ArgumentNamesOpt,
rewritten.ArgumentRefKindsOpt,
rewritten.Expanded,
rewritten.ArgsToParamsOpt,
rewritten.ConstantValueOpt,
rewritten.InitializerExpressionOpt,
rewritten.Type);
}
return rewritten;
}
private void EmitObjectCreationExpression(BoundObjectCreationExpression expression, bool used)
{
MethodSymbol constructor = expression.Constructor;
if (constructor.IsDefaultValueTypeConstructor())
{
EmitInitObj(expression.Type, used, expression.Syntax);
}
else
{
if (!used && ConstructorNotSideEffecting(constructor))
{
// creating nullable has no side-effects, so we will just evaluate the arguments
foreach (var arg in expression.Arguments)
{
EmitExpression(arg, used: false);
}
}
else
{
EmitArguments(expression.Arguments, constructor.Parameters);
var stackAdjustment = GetObjCreationStackBehavior(expression);
_builder.EmitOpCode(ILOpCode.Newobj, stackAdjustment);
// for variadic ctors emit expanded ctor token
EmitSymbolToken(constructor, expression.Syntax,
constructor.IsVararg ? (BoundArgListOperator)expression.Arguments[expression.Arguments.Length - 1] : null);
EmitPopIfUnused(used);
}
}
}
private void EmitObjectCreationExpression(BoundObjectCreationExpression expression, bool used)
{
MethodSymbol constructor = expression.Constructor;
if (constructor.IsParameterlessValueTypeConstructor(requireSynthesized: true))
{
EmitInitObj(expression.Type, used, expression.Syntax);
}
else
{
EmitArguments(expression.Arguments, constructor.Parameters);
var stackAdjustment = GetObjCreationStackBehavior(expression);
builder.EmitOpCode(ILOpCode.Newobj, stackAdjustment);
// for variadic ctors emit expanded ctor token
EmitSymbolToken(constructor, expression.Syntax,
constructor.IsVararg ? (BoundArgListOperator)expression.Arguments[expression.Arguments.Length - 1] : null);
EmitPopIfUnused(used);
}
}
public override BoundNode VisitObjectCreationExpression(BoundObjectCreationExpression node)
{
Debug.Assert(node != null);
// Start by rewriting the arguments:
var rewrittenArguments = VisitList(node.Arguments);
// If the mapping from arguments to parameters is perfectly in order, no complex rewriting is needed.
if (node.ArgsToParamsOpt.IsNull && !node.Expanded)
{
return node.Update(node.ConstructorOpt, rewrittenArguments, node.ArgumentNamesOpt, node.ArgumentRefKindsOpt, node.Expanded, node.ArgsToParamsOpt, node.ConstantValueOpt, node.Type);
}
var argumentRefKinds = node.ArgumentRefKindsOpt;
ReadOnlyArray<LocalSymbol> temps;
Debug.Assert(node.ConstructorOpt != null, "rewriting arguments when there is no constructor");
RewriteArguments(node.ConstructorOpt,
node.Expanded,
node.ArgsToParamsOpt,
ref argumentRefKinds,
ref rewrittenArguments,
out temps);
if (temps.IsNullOrEmpty)
{
return node.Update(
node.ConstructorOpt,
rewrittenArguments,
ReadOnlyArray<string>.Null,
argumentRefKinds,
false,
ReadOnlyArray<int>.Null,
node.ConstantValueOpt,
node.Type);
}
else
{
return new BoundSequence(
null,
null,
temps,
ReadOnlyArray<BoundExpression>.Empty,
new BoundObjectCreationExpression(
node.Syntax,
node.SyntaxTree,
node.ConstructorOpt,
rewrittenArguments,
ReadOnlyArray<string>.Null,
argumentRefKinds,
false,
ReadOnlyArray<int>.Null,
node.ConstantValueOpt,
node.Type),
node.Type
);
}
}
private void InPlaceCtorCall(BoundExpression target, BoundObjectCreationExpression objCreation, bool used)
{
var temp = EmitAddress(target, AddressKind.Writeable);
Debug.Assert(temp == null, "in-place ctor target should not create temps");
var constructor = objCreation.Constructor;
EmitArguments(objCreation.Arguments, constructor.Parameters);
// -2 to adjust for consumed target address and not produced value.
var stackAdjustment = GetObjCreationStackBehavior(objCreation) - 2;
_builder.EmitOpCode(ILOpCode.Call, stackAdjustment);
// for variadic ctors emit expanded ctor token
EmitSymbolToken(constructor, objCreation.Syntax,
constructor.IsVararg ? (BoundArgListOperator)objCreation.Arguments[objCreation.Arguments.Length - 1] : null);
if (used)
{
Debug.Assert(TargetIsNotOnHeap(target), "cannot read-back the target since it could have been modified");
EmitExpression(target, used: true);
}
}
private EEMethodSymbol GetTypeVariablesMethod(EENamedTypeSymbol container, string methodName, NamedTypeSymbol typeVariablesType)
{
var syntax = SyntaxFactory.IdentifierName(SyntaxFactory.MissingToken(SyntaxKind.IdentifierToken));
return this.CreateMethod(container, methodName, syntax, (method, diagnostics) =>
{
var type = method.TypeMap.SubstituteNamedType(typeVariablesType);
var expression = new BoundObjectCreationExpression(syntax, type.InstanceConstructors[0]);
var statement = new BoundReturnStatement(syntax, expression) { WasCompilerGenerated = true };
return statement;
});
}
private static bool IsValidDefaultValue(BoundObjectCreationExpression expression)
{
return(expression.Constructor.IsDefaultValueTypeConstructor() && expression.InitializerExpressionOpt == null);
}
private static bool IsValidDefaultValue(BoundObjectCreationExpression expression)
{
return expression.Constructor.IsDefaultValueTypeConstructor() && expression.InitializerExpressionOpt == null;
}