public virtual bool CheckTypeAccess(CType type, Symbol symWhere)
{
Debug.Assert(type != null);
// Array, Ptr, Nub, etc don't matter.
type = type.GetNakedType(true);
if (!type.IsAggregateType())
{
Debug.Assert(type.IsVoidType() || type.IsErrorType() || type.IsTypeParameterType());
return(true);
}
for (AggregateType ats = type.AsAggregateType(); ats != null; ats = ats.outerType)
{
if (ACCESSERROR.ACCESSERROR_NOERROR != CheckAccessCore(ats.GetOwningAggregate(), ats.outerType, symWhere, null))
{
return(false);
}
}
TypeArray typeArgs = type.AsAggregateType().GetTypeArgsAll();
for (int i = 0; i < typeArgs.size; i++)
{
if (!CheckTypeAccess(typeArgs.Item(i), symWhere))
{
return(false);
}
}
return(true);
}
public virtual ACCESSERROR CheckAccess2(Symbol symCheck, AggregateType atsCheck, Symbol symWhere, CType typeThru)
{
Debug.Assert(symCheck != null);
Debug.Assert(atsCheck == null || symCheck.parent == atsCheck.getAggregate());
Debug.Assert(typeThru == null ||
typeThru.IsAggregateType() ||
typeThru.IsTypeParameterType() ||
typeThru.IsArrayType() ||
typeThru.IsNullableType() ||
typeThru.IsErrorType());
#if DEBUG
switch (symCheck.getKind())
{
default:
break;
case SYMKIND.SK_MethodSymbol:
case SYMKIND.SK_PropertySymbol:
case SYMKIND.SK_FieldSymbol:
case SYMKIND.SK_EventSymbol:
Debug.Assert(atsCheck != null);
break;
}
#endif // DEBUG
ACCESSERROR error = CheckAccessCore(symCheck, atsCheck, symWhere, typeThru);
if (ACCESSERROR.ACCESSERROR_NOERROR != error)
{
return error;
}
// Check the accessibility of the return CType.
CType CType = symCheck.getType();
if (CType == null)
{
return ACCESSERROR.ACCESSERROR_NOERROR;
}
// For members of AGGSYMs, atsCheck should always be specified!
Debug.Assert(atsCheck != null);
if (atsCheck.getAggregate().IsSource())
{
// We already check the "at least as accessible as" rules.
// Does this always work for generics?
// Could we get a bad CType argument in typeThru?
// Maybe call CheckTypeAccess on typeThru?
return ACCESSERROR.ACCESSERROR_NOERROR;
}
// Substitute on the CType.
if (atsCheck.GetTypeArgsAll().size > 0)
{
CType = SymbolLoader.GetTypeManager().SubstType(CType, atsCheck);
}
return CheckTypeAccess(CType, symWhere) ? ACCESSERROR.ACCESSERROR_NOERROR : ACCESSERROR.ACCESSERROR_NOACCESS;
}
public virtual ACCESSERROR CheckAccess2(Symbol symCheck, AggregateType atsCheck, Symbol symWhere, CType typeThru)
{
Debug.Assert(symCheck != null);
Debug.Assert(atsCheck == null || symCheck.parent == atsCheck.getAggregate());
Debug.Assert(typeThru == null ||
typeThru.IsAggregateType() ||
typeThru.IsTypeParameterType() ||
typeThru.IsArrayType() ||
typeThru.IsNullableType() ||
typeThru.IsErrorType());
#if DEBUG
switch (symCheck.getKind())
{
default:
break;
case SYMKIND.SK_MethodSymbol:
case SYMKIND.SK_PropertySymbol:
case SYMKIND.SK_FieldSymbol:
case SYMKIND.SK_EventSymbol:
Debug.Assert(atsCheck != null);
break;
}
#endif // DEBUG
ACCESSERROR error = CheckAccessCore(symCheck, atsCheck, symWhere, typeThru);
if (ACCESSERROR.ACCESSERROR_NOERROR != error)
{
return(error);
}
// Check the accessibility of the return CType.
CType CType = symCheck.getType();
if (CType == null)
{
return(ACCESSERROR.ACCESSERROR_NOERROR);
}
// For members of AGGSYMs, atsCheck should always be specified!
Debug.Assert(atsCheck != null);
if (atsCheck.getAggregate().IsSource())
{
// We already check the "at least as accessible as" rules.
// Does this always work for generics?
// Could we get a bad CType argument in typeThru?
// Maybe call CheckTypeAccess on typeThru?
return(ACCESSERROR.ACCESSERROR_NOERROR);
}
// Substitute on the CType.
if (atsCheck.GetTypeArgsAll().size > 0)
{
CType = SymbolLoader.GetTypeManager().SubstType(CType, atsCheck);
}
return(CheckTypeAccess(CType, symWhere) ? ACCESSERROR.ACCESSERROR_NOERROR : ACCESSERROR.ACCESSERROR_NOACCESS);
}
/***************************************************************************************************
*
* There exists an explicit conversion ...
* From a generic delegate type S to generic delegate type T, provided all of the follow are true:
* o Both types are constructed generic types of the same generic delegate type, D<X1,... Xk>.That is,
* S is D<S1,... Sk> and T is D<T1,... Tk>.
* o S is not compatible with or identical to T.
* o If type parameter Xi is declared to be invariant then Si must be identical to Ti.
* o If type parameter Xi is declared to be covariant ("out") then Si must be convertible
* to Ti via an identify conversion, implicit reference conversion, or explicit reference conversion.
* o If type parameter Xi is declared to be contravariant ("in") then either Si must be identical to Ti,
* or Si and Ti must both be reference types.
***************************************************************************************************/
public static bool HasGenericDelegateExplicitReferenceConversion(SymbolLoader loader, CType pSource, CType pTarget)
{
if (!pSource.isDelegateType() ||
!pTarget.isDelegateType() ||
pSource.getAggregate() != pTarget.getAggregate() ||
loader.HasIdentityOrImplicitReferenceConversion(pSource, pTarget))
{
return(false);
}
TypeArray pTypeParams = pSource.getAggregate().GetTypeVarsAll();
TypeArray pSourceArgs = pSource.AsAggregateType().GetTypeArgsAll();
TypeArray pTargetArgs = pTarget.AsAggregateType().GetTypeArgsAll();
Debug.Assert(pTypeParams.size == pSourceArgs.size);
Debug.Assert(pTypeParams.size == pTargetArgs.size);
for (int iParam = 0; iParam < pTypeParams.size; ++iParam)
{
CType pSourceArg = pSourceArgs.Item(iParam);
CType pTargetArg = pTargetArgs.Item(iParam);
// If they're identical then this one is automatically good, so skip it.
// If we have an error type, then we're in some fault tolerance. Let it through.
if (pSourceArg == pTargetArg || pTargetArg.IsErrorType() || pSourceArg.IsErrorType())
{
continue;
}
TypeParameterType pParam = pTypeParams.Item(iParam).AsTypeParameterType();
if (pParam.Invariant)
{
return(false);
}
if (pParam.Covariant)
{
if (!FExpRefConv(loader, pSourceArg, pTargetArg))
{
return(false);
}
}
else if (pParam.Contravariant)
{
if (!pSourceArg.IsRefType() || !pTargetArg.IsRefType())
{
return(false);
}
}
}
return(true);
}
public virtual bool CheckTypeAccess(CType type, Symbol symWhere)
{
Debug.Assert(type != null);
// Array, Ptr, Nub, etc don't matter.
type = type.GetNakedType(true);
if (!type.IsAggregateType())
{
Debug.Assert(type.IsVoidType() || type.IsErrorType() || type.IsTypeParameterType());
return true;
}
for (AggregateType ats = type.AsAggregateType(); ats != null; ats = ats.outerType)
{
if (ACCESSERROR.ACCESSERROR_NOERROR != CheckAccessCore(ats.GetOwningAggregate(), ats.outerType, symWhere, null))
{
return false;
}
}
TypeArray typeArgs = type.AsAggregateType().GetTypeArgsAll();
for (int i = 0; i < typeArgs.size; i++)
{
if (!CheckTypeAccess(typeArgs.Item(i), symWhere))
return false;
}
return true;
}
//
// SymbolLoader forwarders (end)
/////////////////////////////////////////////////////////////////////////////////
//
// Utility methods
//
protected ACCESSERROR CheckAccessCore(Symbol symCheck, AggregateType atsCheck, Symbol symWhere, CType typeThru)
{
Debug.Assert(symCheck != null);
Debug.Assert(atsCheck == null || symCheck.parent == atsCheck.getAggregate());
Debug.Assert(typeThru == null ||
typeThru.IsAggregateType() ||
typeThru.IsTypeParameterType() ||
typeThru.IsArrayType() ||
typeThru.IsNullableType() ||
typeThru.IsErrorType());
switch (symCheck.GetAccess())
{
default:
throw Error.InternalCompilerError();
//return ACCESSERROR.ACCESSERROR_NOACCESS;
case ACCESS.ACC_UNKNOWN:
return ACCESSERROR.ACCESSERROR_NOACCESS;
case ACCESS.ACC_PUBLIC:
return ACCESSERROR.ACCESSERROR_NOERROR;
case ACCESS.ACC_PRIVATE:
case ACCESS.ACC_PROTECTED:
if (symWhere == null)
{
return ACCESSERROR.ACCESSERROR_NOACCESS;
}
break;
case ACCESS.ACC_INTERNAL:
case ACCESS.ACC_INTERNALPROTECTED: // Check internal, then protected.
if (symWhere == null)
{
return ACCESSERROR.ACCESSERROR_NOACCESS;
}
if (symWhere.SameAssemOrFriend(symCheck))
{
return ACCESSERROR.ACCESSERROR_NOERROR;
}
if (symCheck.GetAccess() == ACCESS.ACC_INTERNAL)
{
return ACCESSERROR.ACCESSERROR_NOACCESS;
}
break;
}
// Should always have atsCheck for private and protected access check.
// We currently don't need it since access doesn't respect instantiation.
// We just use symWhere.parent.AsAggregateSymbol() instead.
AggregateSymbol aggCheck = symCheck.parent.AsAggregateSymbol();
// Find the inner-most enclosing AggregateSymbol.
AggregateSymbol aggWhere = null;
for (Symbol symT = symWhere; symT != null; symT = symT.parent)
{
if (symT.IsAggregateSymbol())
{
aggWhere = symT.AsAggregateSymbol();
break;
}
if (symT.IsAggregateDeclaration())
{
aggWhere = symT.AsAggregateDeclaration().Agg();
break;
}
}
if (aggWhere == null)
{
return ACCESSERROR.ACCESSERROR_NOACCESS;
}
// First check for private access.
for (AggregateSymbol agg = aggWhere; agg != null; agg = agg.GetOuterAgg())
{
if (agg == aggCheck)
{
return ACCESSERROR.ACCESSERROR_NOERROR;
}
}
if (symCheck.GetAccess() == ACCESS.ACC_PRIVATE)
{
return ACCESSERROR.ACCESSERROR_NOACCESS;
}
// Handle the protected case - which is the only real complicated one.
Debug.Assert(symCheck.GetAccess() == ACCESS.ACC_PROTECTED || symCheck.GetAccess() == ACCESS.ACC_INTERNALPROTECTED);
// Check if symCheck is in aggWhere or a base of aggWhere,
// or in an outer agg of aggWhere or a base of an outer agg of aggWhere.
AggregateType atsThru = null;
if (typeThru != null && !symCheck.isStatic)
{
atsThru = SymbolLoader.GetAggTypeSym(typeThru);
}
// Look for aggCheck among the base classes of aggWhere and outer aggs.
bool found = false;
for (AggregateSymbol agg = aggWhere; agg != null; agg = agg.GetOuterAgg())
{
Debug.Assert(agg != aggCheck); // We checked for this above.
// Look for aggCheck among the base classes of agg.
if (agg.FindBaseAgg(aggCheck))
{
found = true;
// aggCheck is a base class of agg. Check atsThru.
// For non-static protected access to be legal, atsThru must be an instantiation of
// agg or a CType derived from an instantiation of agg. In this case
// all that matters is that agg is in the base AggregateSymbol chain of atsThru. The
// actual AGGTYPESYMs involved don't matter.
if (atsThru == null || atsThru.getAggregate().FindBaseAgg(agg))
{
return ACCESSERROR.ACCESSERROR_NOERROR;
}
}
}
// the CType in which the method is being called has no relationship with the
// CType on which the method is defined surely this is NOACCESS and not NOACCESSTHRU
if (found == false)
return ACCESSERROR.ACCESSERROR_NOACCESS;
return (atsThru == null) ? ACCESSERROR.ACCESSERROR_NOACCESS : ACCESSERROR.ACCESSERROR_NOACCESSTHRU;
}
/*
* BindImplicitConversion
*
* This is a complex routine with complex parameters. Generally, this should
* be called through one of the helper methods that insulates you
* from the complexity of the interface. This routine handles all the logic
* associated with implicit conversions.
*
* exprSrc - the expression being converted. Can be null if only type conversion
* info is being supplied.
* typeSrc - type of the source
* typeDest - type of the destination
* exprDest - returns an expression of the src converted to the dest. If null, we
* only care about whether the conversion can be attempted, not the
* expression tree.
* flags - flags possibly customizing the conversions allowed. E.g., can suppress
* user-defined conversions.
*
* returns true if the conversion can be made, false if not.
*/
public bool Bind()
{
// 13.1 Implicit conversions
//
// The following conversions are classified as implicit conversions:
//
// * Identity conversions
// * Implicit numeric conversions
// * Implicit enumeration conversions
// * Implicit reference conversions
// * Boxing conversions
// * Implicit type parameter conversions
// * Implicit constant expression conversions
// * User-defined implicit conversions
// * Implicit conversions from an anonymous method expression to a compatible delegate type
// * Implicit conversion from a method group to a compatible delegate type
// * Conversions from the null type (11.2.7) to any nullable type
// * Implicit nullable conversions
// * Lifted user-defined implicit conversions
//
// Implicit conversions can occur in a variety of situations, including function member invocations
// (14.4.3), cast expressions (14.6.6), and assignments (14.14).
// Can't convert to or from the error type.
if (typeSrc == null || typeDest == null || typeDest.IsNeverSameType())
{
return(false);
}
Debug.Assert(typeSrc != null && typeDest != null); // types must be supplied.
Debug.Assert(exprSrc == null || typeSrc == exprSrc.type); // type of source should be correct if source supplied
Debug.Assert(!needsExprDest || exprSrc != null); // need source expr to create dest expr
switch (typeDest.GetTypeKind())
{
case TypeKind.TK_ErrorType:
Debug.Assert(typeDest.AsErrorType().HasTypeParent() || typeDest.AsErrorType().HasNSParent());
if (typeSrc != typeDest)
{
return(false);
}
if (needsExprDest)
{
exprDest = exprSrc;
}
return(true);
case TypeKind.TK_NullType:
// Can only convert to the null type if src is null.
if (!typeSrc.IsNullType())
{
return(false);
}
if (needsExprDest)
{
exprDest = exprSrc;
}
return(true);
case TypeKind.TK_MethodGroupType:
VSFAIL("Something is wrong with Type.IsNeverSameType()");
return(false);
case TypeKind.TK_NaturalIntegerType:
case TypeKind.TK_ArgumentListType:
return(typeSrc == typeDest);
case TypeKind.TK_VoidType:
return(false);
default:
break;
}
if (typeSrc.IsErrorType())
{
Debug.Assert(!typeDest.IsErrorType());
return(false);
}
// 13.1.1 Identity conversion
//
// An identity conversion converts from any type to the same type. This conversion exists only
// such that an entity that already has a required type can be said to be convertible to that type.
if (typeSrc == typeDest &&
((flags & CONVERTTYPE.ISEXPLICIT) == 0 || (!typeSrc.isPredefType(PredefinedType.PT_FLOAT) && !typeSrc.isPredefType(PredefinedType.PT_DOUBLE))))
{
if (needsExprDest)
{
exprDest = exprSrc;
}
return(true);
}
if (typeDest.IsNullableType())
{
return(BindNubConversion(typeDest.AsNullableType()));
}
if (typeSrc.IsNullableType())
{
return(bindImplicitConversionFromNullable(typeSrc.AsNullableType()));
}
if ((flags & CONVERTTYPE.ISEXPLICIT) != 0)
{
flags |= CONVERTTYPE.NOUDC;
}
// Get the fundamental types of destination.
FUNDTYPE ftDest = typeDest.fundType();
Debug.Assert(ftDest != FUNDTYPE.FT_NONE || typeDest.IsParameterModifierType());
switch (typeSrc.GetTypeKind())
{
default:
VSFAIL("Bad type symbol kind");
break;
case TypeKind.TK_MethodGroupType:
if (exprSrc.isMEMGRP())
{
EXPRCALL outExpr;
bool retVal = binder.BindGrpConversion(exprSrc.asMEMGRP(), typeDest, needsExprDest, out outExpr, false);
exprDest = outExpr;
return(retVal);
}
return(false);
case TypeKind.TK_VoidType:
case TypeKind.TK_ErrorType:
case TypeKind.TK_ParameterModifierType:
case TypeKind.TK_ArgumentListType:
return(false);
case TypeKind.TK_NullType:
if (bindImplicitConversionFromNull())
{
return(true);
}
// If not, try user defined implicit conversions.
break;
case TypeKind.TK_ArrayType:
if (bindImplicitConversionFromArray())
{
return(true);
}
// If not, try user defined implicit conversions.
break;
case TypeKind.TK_PointerType:
if (bindImplicitConversionFromPointer())
{
return(true);
}
// If not, try user defined implicit conversions.
break;
case TypeKind.TK_TypeParameterType:
if (bindImplicitConversionFromTypeVar(typeSrc.AsTypeParameterType()))
{
return(true);
}
// If not, try user defined implicit conversions.
break;
case TypeKind.TK_AggregateType:
// TypeReference and ArgIterator can't be boxed (or converted to anything else)
if (typeSrc.isSpecialByRefType())
{
return(false);
}
if (bindImplicitConversionFromAgg(typeSrc.AsAggregateType()))
{
return(true);
}
// If not, try user defined implicit conversions.
break;
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// RUNTIME BINDER ONLY CHANGE
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//
// Every incoming dynamic operand should be implicitly convertible
// to any type that it is an instance of.
if (exprSrc != null &&
exprSrc.RuntimeObject != null &&
typeDest.AssociatedSystemType.IsInstanceOfType(exprSrc.RuntimeObject) &&
binder.GetSemanticChecker().CheckTypeAccess(typeDest, binder.Context.ContextForMemberLookup()))
{
if (needsExprDest)
{
binder.bindSimpleCast(exprSrc, exprTypeDest, out exprDest, exprSrc.flags & EXPRFLAG.EXF_CANTBENULL);
}
return(true);
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// END RUNTIME BINDER ONLY CHANGE
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// 13.1.8 User-defined implicit conversions
//
// A user-defined implicit conversion consists of an optional standard implicit conversion,
// followed by execution of a user-defined implicit conversion operator, followed by another
// optional standard implicit conversion. The exact rules for evaluating user-defined
// conversions are described in 13.4.3.
if (0 == (flags & CONVERTTYPE.NOUDC))
{
return(binder.bindUserDefinedConversion(exprSrc, typeSrc, typeDest, needsExprDest, out exprDest, true));
}
// No conversion was found.
return(false);
}
public bool SubstEqualTypesCore(CType typeDst, CType typeSrc, SubstContext pctx)
{
LRecurse: // Label used for "tail" recursion.
if (typeDst == typeSrc || typeDst.Equals(typeSrc))
{
return true;
}
switch (typeSrc.GetTypeKind())
{
default:
Debug.Assert(false, "Bad Symbol kind in SubstEqualTypesCore");
return false;
case TypeKind.TK_NullType:
case TypeKind.TK_VoidType:
case TypeKind.TK_OpenTypePlaceholderType:
// There should only be a single instance of these.
Debug.Assert(typeDst.GetTypeKind() != typeSrc.GetTypeKind());
return false;
case TypeKind.TK_ArrayType:
if (typeDst.GetTypeKind() != TypeKind.TK_ArrayType || typeDst.AsArrayType().rank != typeSrc.AsArrayType().rank)
return false;
goto LCheckBases;
case TypeKind.TK_ParameterModifierType:
if (typeDst.GetTypeKind() != TypeKind.TK_ParameterModifierType ||
((pctx.grfst & SubstTypeFlags.NoRefOutDifference) == 0 &&
typeDst.AsParameterModifierType().isOut != typeSrc.AsParameterModifierType().isOut))
return false;
goto LCheckBases;
case TypeKind.TK_PointerType:
case TypeKind.TK_NullableType:
if (typeDst.GetTypeKind() != typeSrc.GetTypeKind())
return false;
LCheckBases:
typeSrc = typeSrc.GetBaseOrParameterOrElementType();
typeDst = typeDst.GetBaseOrParameterOrElementType();
goto LRecurse;
case TypeKind.TK_AggregateType:
if (typeDst.GetTypeKind() != TypeKind.TK_AggregateType)
return false;
{ // BLOCK
AggregateType atsSrc = typeSrc.AsAggregateType();
AggregateType atsDst = typeDst.AsAggregateType();
if (atsSrc.getAggregate() != atsDst.getAggregate())
return false;
Debug.Assert(atsSrc.GetTypeArgsAll().Size == atsDst.GetTypeArgsAll().Size);
// All the args must unify.
for (int i = 0; i < atsSrc.GetTypeArgsAll().Size; i++)
{
if (!SubstEqualTypesCore(atsDst.GetTypeArgsAll().Item(i), atsSrc.GetTypeArgsAll().Item(i), pctx))
return false;
}
}
return true;
case TypeKind.TK_ErrorType:
if (!typeDst.IsErrorType() || !typeSrc.AsErrorType().HasParent() || !typeDst.AsErrorType().HasParent())
return false;
{
ErrorType errSrc = typeSrc.AsErrorType();
ErrorType errDst = typeDst.AsErrorType();
Debug.Assert(errSrc.nameText != null && errSrc.typeArgs != null);
Debug.Assert(errDst.nameText != null && errDst.typeArgs != null);
if (errSrc.nameText != errDst.nameText || errSrc.typeArgs.Size != errDst.typeArgs.Size)
return false;
if (errSrc.HasTypeParent() != errDst.HasTypeParent())
{
return false;
}
if (errSrc.HasTypeParent())
{
if (errSrc.GetTypeParent() != errDst.GetTypeParent())
{
return false;
}
if (!SubstEqualTypesCore(errDst.GetTypeParent(), errSrc.GetTypeParent(), pctx))
{
return false;
}
}
else
{
if (errSrc.GetNSParent() != errDst.GetNSParent())
{
return false;
}
}
// All the args must unify.
for (int i = 0; i < errSrc.typeArgs.Size; i++)
{
if (!SubstEqualTypesCore(errDst.typeArgs.Item(i), errSrc.typeArgs.Item(i), pctx))
return false;
}
}
return true;
case TypeKind.TK_TypeParameterType:
{ // BLOCK
TypeParameterSymbol tvs = typeSrc.AsTypeParameterType().GetTypeParameterSymbol();
int index = tvs.GetIndexInTotalParameters();
if (tvs.IsMethodTypeParameter())
{
if ((pctx.grfst & SubstTypeFlags.DenormMeth) != 0 && tvs.parent != null)
{
// typeDst == typeSrc was handled above.
Debug.Assert(typeDst != typeSrc);
return false;
}
Debug.Assert(tvs.GetIndexInOwnParameters() == tvs.GetIndexInTotalParameters());
Debug.Assert(pctx.prgtypeMeth == null || tvs.GetIndexInTotalParameters() < pctx.ctypeMeth);
if (index < pctx.ctypeMeth && pctx.prgtypeMeth != null)
{
return typeDst == pctx.prgtypeMeth[index];
}
if ((pctx.grfst & SubstTypeFlags.NormMeth) != 0)
{
return typeDst == GetStdMethTypeVar(index);
}
}
else
{
if ((pctx.grfst & SubstTypeFlags.DenormClass) != 0 && tvs.parent != null)
{
// typeDst == typeSrc was handled above.
Debug.Assert(typeDst != typeSrc);
return false;
}
Debug.Assert(pctx.prgtypeCls == null || tvs.GetIndexInTotalParameters() < pctx.ctypeCls);
if (index < pctx.ctypeCls)
return typeDst == pctx.prgtypeCls[index];
if ((pctx.grfst & SubstTypeFlags.NormClass) != 0)
return typeDst == GetStdClsTypeVar(index);
}
}
return false;
}
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// RUNTIME BINDER ONLY CHANGE
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
internal bool GetBestAccessibleType(CSemanticChecker semanticChecker, BindingContext bindingContext, CType typeSrc, out CType typeDst)
{
// This method implements the "best accessible type" algorithm for determining the type
// of untyped arguments in the runtime binder. It is also used in method type inference
// to fix type arguments to types that are accessible.
// The new type is returned in an out parameter. The result will be true (and the out param
// non-null) only when the algorithm could find a suitable accessible type.
Debug.Assert(semanticChecker != null);
Debug.Assert(bindingContext != null);
Debug.Assert(typeSrc != null);
typeDst = null;
if (semanticChecker.CheckTypeAccess(typeSrc, bindingContext.ContextForMemberLookup()))
{
// If we already have an accessible type, then use it. This is the terminal point of the recursion.
typeDst = typeSrc;
return true;
}
// These guys have no accessibility concerns.
Debug.Assert(!typeSrc.IsVoidType() && !typeSrc.IsErrorType() && !typeSrc.IsTypeParameterType());
if (typeSrc.IsParameterModifierType() || typeSrc.IsPointerType())
{
// We cannot vary these.
return false;
}
CType intermediateType;
if ((typeSrc.isInterfaceType() || typeSrc.isDelegateType()) && TryVarianceAdjustmentToGetAccessibleType(semanticChecker, bindingContext, typeSrc.AsAggregateType(), out intermediateType))
{
// If we have an interface or delegate type, then it can potentially be varied by its type arguments
// to produce an accessible type, and if that's the case, then return that.
// Example: IEnumerable<PrivateConcreteFoo> --> IEnumerable<PublicAbstractFoo>
typeDst = intermediateType;
Debug.Assert(semanticChecker.CheckTypeAccess(typeDst, bindingContext.ContextForMemberLookup()));
return true;
}
if (typeSrc.IsArrayType() && TryArrayVarianceAdjustmentToGetAccessibleType(semanticChecker, bindingContext, typeSrc.AsArrayType(), out intermediateType))
{
// Similarly to the interface and delegate case, arrays are covariant in their element type and
// so we can potentially produce an array type that is accessible.
// Example: PrivateConcreteFoo[] --> PublicAbstractFoo[]
typeDst = intermediateType;
Debug.Assert(semanticChecker.CheckTypeAccess(typeDst, bindingContext.ContextForMemberLookup()));
return true;
}
if (typeSrc.IsNullableType())
{
// We have an inaccessible nullable type, which means that the best we can do is System.ValueType.
typeDst = this.GetOptPredefAgg(PredefinedType.PT_VALUE).getThisType();
Debug.Assert(semanticChecker.CheckTypeAccess(typeDst, bindingContext.ContextForMemberLookup()));
return true;
}
if (typeSrc.IsArrayType())
{
// We have an inaccessible array type for which we could not earlier find a better array type
// with a covariant conversion, so the best we can do is System.Array.
typeDst = this.GetReqPredefAgg(PredefinedType.PT_ARRAY).getThisType();
Debug.Assert(semanticChecker.CheckTypeAccess(typeDst, bindingContext.ContextForMemberLookup()));
return true;
}
Debug.Assert(typeSrc.IsAggregateType());
if (typeSrc.IsAggregateType())
{
// We have an AggregateType, so recurse on its base class.
AggregateType aggType = typeSrc.AsAggregateType();
AggregateType baseType = aggType.GetBaseClass();
if (baseType == null)
{
// This happens with interfaces, for instance. But in that case, the
// conversion to object does exist, is an implicit reference conversion,
// and so we will use it.
baseType = this.GetReqPredefAgg(PredefinedType.PT_OBJECT).getThisType();
}
return GetBestAccessibleType(semanticChecker, bindingContext, baseType, out typeDst);
}
return false;
}
private static bool CheckSingleConstraint(CSemanticChecker checker, ErrorHandling errHandling, Symbol symErr, TypeParameterType var, CType arg, TypeArray typeArgsCls, TypeArray typeArgsMeth, CheckConstraintsFlags flags)
{
bool fReportErrors = 0 == (flags & CheckConstraintsFlags.NoErrors);
if (arg.IsOpenTypePlaceholderType())
{
return true;
}
if (arg.IsErrorType())
{
// Error should have been reported previously.
return false;
}
if (checker.CheckBogus(arg))
{
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_BogusType, arg);
}
return false;
}
if (arg.IsPointerType() || arg.isSpecialByRefType())
{
if (fReportErrors)
{
errHandling.Error(ErrorCode.ERR_BadTypeArgument, arg);
}
return false;
}
if (arg.isStaticClass())
{
if (fReportErrors)
{
checker.ReportStaticClassError(null, arg, ErrorCode.ERR_GenericArgIsStaticClass);
}
return false;
}
bool fError = false;
if (var.HasRefConstraint() && !arg.IsRefType())
{
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_RefConstraintNotSatisfied, symErr, new ErrArgNoRef(var), arg);
}
fError = true;
}
TypeArray bnds = checker.GetSymbolLoader().GetTypeManager().SubstTypeArray(var.GetBounds(), typeArgsCls, typeArgsMeth);
int itypeMin = 0;
if (var.HasValConstraint())
{
// If we have a type variable that is constrained to a value type, then we
// want to check if its a nullable type, so that we can report the
// constraint error below. In order to do this however, we need to check
// that either the type arg is not a value type, or it is a nullable type.
//
// To check whether or not its a nullable type, we need to get the resolved
// bound from the type argument and check against that.
bool bIsValueType = arg.IsValType();
bool bIsNullable = arg.IsNullableType();
if (bIsValueType && arg.IsTypeParameterType())
{
TypeArray pArgBnds = arg.AsTypeParameterType().GetBounds();
if (pArgBnds.size > 0)
{
bIsNullable = pArgBnds.Item(0).IsNullableType();
}
}
if (!bIsValueType || bIsNullable)
{
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_ValConstraintNotSatisfied, symErr, new ErrArgNoRef(var), arg);
}
fError = true;
}
// Since FValCon() is set it is redundant to check System.ValueType as well.
if (bnds.size != 0 && bnds.Item(0).isPredefType(PredefinedType.PT_VALUE))
{
itypeMin = 1;
}
}
for (int j = itypeMin; j < bnds.size; j++)
{
CType typeBnd = bnds.Item(j);
if (!SatisfiesBound(checker, arg, typeBnd))
{
if (fReportErrors)
{
// The bound isn't satisfied because of a constaint type. Explain to the user why not.
// There are 4 main cases, based on the type of the supplied type argument:
// - reference type, or type parameter known to be a reference type
// - nullable type, from which there is a boxing conversion to the constraint type(see below for details)
// - type varaiable
// - value type
// These cases are broken out because: a) The sets of conversions which can be used
// for constraint satisfaction is different based on the type argument supplied,
// and b) Nullable is one funky type, and user's can use all the help they can get
// when using it.
ErrorCode error;
if (arg.IsRefType())
{
// A reference type can only satisfy bounds to types
// to which they have an implicit reference conversion
error = ErrorCode.ERR_GenericConstraintNotSatisfiedRefType;
}
else if (arg.IsNullableType() && checker.GetSymbolLoader().HasBaseConversion(arg.AsNullableType().GetUnderlyingType(), typeBnd)) // This is inlining FBoxingConv
{
// nullable types do not satisfy bounds to every type that they are boxable to
// They only satisfy bounds of object and ValueType
if (typeBnd.isPredefType(PredefinedType.PT_ENUM) || arg.AsNullableType().GetUnderlyingType() == typeBnd)
{
// Nullable types don't satisfy bounds of EnumType, or the underlying type of the enum
// even though the conversion from Nullable to these types is a boxing conversion
// This is a rare case, because these bounds can never be directly stated ...
// These bounds can only occur when one type paramter is constrained to a second type parameter
// and the second type parameter is instantiated with Enum or the underlying type of the first type
// parameter
error = ErrorCode.ERR_GenericConstraintNotSatisfiedNullableEnum;
}
else
{
// Nullable types don't satisfy the bounds of any interface type
// even when there is a boxing conversion from the Nullable type to
// the interface type. This will be a relatively common scenario
// so we cal it out separately from the previous case.
Debug.Assert(typeBnd.isInterfaceType());
error = ErrorCode.ERR_GenericConstraintNotSatisfiedNullableInterface;
}
}
else if (arg.IsTypeParameterType())
{
// Type variables can satisfy bounds through boxing and type variable conversions
Debug.Assert(!arg.IsRefType());
error = ErrorCode.ERR_GenericConstraintNotSatisfiedTyVar;
}
else
{
// Value types can only satisfy bounds through boxing conversions.
// Note that the exceptional case of Nullable types and boxing is handled above.
error = ErrorCode.ERR_GenericConstraintNotSatisfiedValType;
}
errHandling.Error(error, new ErrArgRef(symErr), new ErrArg(typeBnd, ErrArgFlags.Unique), var, new ErrArgRef(arg, ErrArgFlags.Unique));
}
fError = true;
}
}
// Check the newable constraint.
if (!var.HasNewConstraint() || arg.IsValType())
{
return !fError;
}
if (arg.isClassType())
{
AggregateSymbol agg = arg.AsAggregateType().getAggregate();
// Due to late binding nature of IDE created symbols, the AggregateSymbol might not
// have all the information necessary yet, if it is not fully bound.
// by calling LookupAggMember, it will ensure that we will update all the
// information necessary at least for the given method.
checker.GetSymbolLoader().LookupAggMember(checker.GetNameManager().GetPredefName(PredefinedName.PN_CTOR), agg, symbmask_t.MASK_ALL);
if (agg.HasPubNoArgCtor() && !agg.IsAbstract())
{
return !fError;
}
}
else if (arg.IsTypeParameterType() && arg.AsTypeParameterType().HasNewConstraint())
{
return !fError;
}
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_NewConstraintNotSatisfied, symErr, new ErrArgNoRef(var), arg);
}
return false;
}
/*
* BindExplicitConversion
*
* This is a complex routine with complex parameter. Generally, this should
* be called through one of the helper methods that insulates you
* from the complexity of the interface. This routine handles all the logic
* associated with explicit conversions.
*
* Note that this function calls BindImplicitConversion first, so the main
* logic is only concerned with conversions that can be made explicitly, but
* not implicitly.
*/
public bool Bind()
{
// To test for a standard conversion, call canConvert(exprSrc, typeDest, STANDARDANDCONVERTTYPE.NOUDC) and
// canConvert(typeDest, typeSrc, STANDARDANDCONVERTTYPE.NOUDC).
Debug.Assert((_flags & CONVERTTYPE.STANDARD) == 0);
// 13.2 Explicit conversions
//
// The following conversions are classified as explicit conversions:
//
// * All implicit conversions
// * Explicit numeric conversions
// * Explicit enumeration conversions
// * Explicit reference conversions
// * Explicit interface conversions
// * Unboxing conversions
// * Explicit type parameter conversions
// * User-defined explicit conversions
// * Explicit nullable conversions
// * Lifted user-defined explicit conversions
//
// Explicit conversions can occur in cast expressions (14.6.6).
//
// The explicit conversions that are not implicit conversions are conversions that cannot be
// proven always to succeed, conversions that are known possibly to lose information, and
// conversions across domains of types sufficiently different to merit explicit notation.
// The set of explicit conversions includes all implicit conversions.
// Don't try user-defined conversions now because we'll try them again later.
if (_binder.BindImplicitConversion(_exprSrc, _typeSrc, _exprTypeDest, _pDestinationTypeForLambdaErrorReporting, _needsExprDest, out _exprDest, _flags | CONVERTTYPE.ISEXPLICIT))
{
return(true);
}
if (_typeSrc == null || _typeDest == null || _typeSrc.IsErrorType() ||
_typeDest.IsErrorType() || _typeDest.IsNeverSameType())
{
return(false);
}
if (_typeDest.IsNullableType())
{
// This is handled completely by BindImplicitConversion.
return(false);
}
if (_typeSrc.IsNullableType())
{
return(bindExplicitConversionFromNub());
}
if (bindExplicitConversionFromArrayToIList())
{
return(true);
}
// if we were casting an integral constant to another constant type,
// then, if the constant were in range, then the above call would have succeeded.
// But it failed, and so we know that the constant is not in range
switch (_typeDest.GetTypeKind())
{
default:
VSFAIL("Bad type kind");
return(false);
case TypeKind.TK_VoidType:
return(false); // Can't convert to a method group or anon method.
case TypeKind.TK_NullType:
return(false); // Can never convert TO the null type.
case TypeKind.TK_TypeParameterType:
if (bindExplicitConversionToTypeVar())
{
return(true);
}
break;
case TypeKind.TK_ArrayType:
if (bindExplicitConversionToArray(_typeDest.AsArrayType()))
{
return(true);
}
break;
case TypeKind.TK_PointerType:
if (bindExplicitConversionToPointer())
{
return(true);
}
break;
case TypeKind.TK_AggregateType:
{
AggCastResult result = bindExplicitConversionToAggregate(_typeDest.AsAggregateType());
if (result == AggCastResult.Success)
{
return(true);
}
if (result == AggCastResult.Abort)
{
return(false);
}
break;
}
}
// No built-in conversion was found. Maybe a user-defined conversion?
if (0 == (_flags & CONVERTTYPE.NOUDC))
{
return(_binder.bindUserDefinedConversion(_exprSrc, _typeSrc, _typeDest, _needsExprDest, out _exprDest, false));
}
return(false);
}
//
// SymbolLoader forwarders (end)
/////////////////////////////////////////////////////////////////////////////////
//
// Utility methods
//
protected ACCESSERROR CheckAccessCore(Symbol symCheck, AggregateType atsCheck, Symbol symWhere, CType typeThru)
{
Debug.Assert(symCheck != null);
Debug.Assert(atsCheck == null || symCheck.parent == atsCheck.getAggregate());
Debug.Assert(typeThru == null ||
typeThru.IsAggregateType() ||
typeThru.IsTypeParameterType() ||
typeThru.IsArrayType() ||
typeThru.IsNullableType() ||
typeThru.IsErrorType());
switch (symCheck.GetAccess())
{
default:
throw Error.InternalCompilerError();
//return ACCESSERROR.ACCESSERROR_NOACCESS;
case ACCESS.ACC_UNKNOWN:
return(ACCESSERROR.ACCESSERROR_NOACCESS);
case ACCESS.ACC_PUBLIC:
return(ACCESSERROR.ACCESSERROR_NOERROR);
case ACCESS.ACC_PRIVATE:
case ACCESS.ACC_PROTECTED:
if (symWhere == null)
{
return(ACCESSERROR.ACCESSERROR_NOACCESS);
}
break;
case ACCESS.ACC_INTERNAL:
case ACCESS.ACC_INTERNALPROTECTED: // Check internal, then protected.
if (symWhere == null)
{
return(ACCESSERROR.ACCESSERROR_NOACCESS);
}
if (symWhere.SameAssemOrFriend(symCheck))
{
return(ACCESSERROR.ACCESSERROR_NOERROR);
}
if (symCheck.GetAccess() == ACCESS.ACC_INTERNAL)
{
return(ACCESSERROR.ACCESSERROR_NOACCESS);
}
break;
}
// Should always have atsCheck for private and protected access check.
// We currently don't need it since access doesn't respect instantiation.
// We just use symWhere.parent.AsAggregateSymbol() instead.
AggregateSymbol aggCheck = symCheck.parent.AsAggregateSymbol();
// Find the inner-most enclosing AggregateSymbol.
AggregateSymbol aggWhere = null;
for (Symbol symT = symWhere; symT != null; symT = symT.parent)
{
if (symT.IsAggregateSymbol())
{
aggWhere = symT.AsAggregateSymbol();
break;
}
if (symT.IsAggregateDeclaration())
{
aggWhere = symT.AsAggregateDeclaration().Agg();
break;
}
}
if (aggWhere == null)
{
return(ACCESSERROR.ACCESSERROR_NOACCESS);
}
// First check for private access.
for (AggregateSymbol agg = aggWhere; agg != null; agg = agg.GetOuterAgg())
{
if (agg == aggCheck)
{
return(ACCESSERROR.ACCESSERROR_NOERROR);
}
}
if (symCheck.GetAccess() == ACCESS.ACC_PRIVATE)
{
return(ACCESSERROR.ACCESSERROR_NOACCESS);
}
// Handle the protected case - which is the only real complicated one.
Debug.Assert(symCheck.GetAccess() == ACCESS.ACC_PROTECTED || symCheck.GetAccess() == ACCESS.ACC_INTERNALPROTECTED);
// Check if symCheck is in aggWhere or a base of aggWhere,
// or in an outer agg of aggWhere or a base of an outer agg of aggWhere.
AggregateType atsThru = null;
if (typeThru != null && !symCheck.isStatic)
{
atsThru = SymbolLoader.GetAggTypeSym(typeThru);
}
// Look for aggCheck among the base classes of aggWhere and outer aggs.
bool found = false;
for (AggregateSymbol agg = aggWhere; agg != null; agg = agg.GetOuterAgg())
{
Debug.Assert(agg != aggCheck); // We checked for this above.
// Look for aggCheck among the base classes of agg.
if (agg.FindBaseAgg(aggCheck))
{
found = true;
// aggCheck is a base class of agg. Check atsThru.
// For non-static protected access to be legal, atsThru must be an instantiation of
// agg or a CType derived from an instantiation of agg. In this case
// all that matters is that agg is in the base AggregateSymbol chain of atsThru. The
// actual AGGTYPESYMs involved don't matter.
if (atsThru == null || atsThru.getAggregate().FindBaseAgg(agg))
{
return(ACCESSERROR.ACCESSERROR_NOERROR);
}
}
}
// the CType in whice the method is being called has no relationship with the
// CType on which the method is defined surely this is NOACCESS and not NOACCESSTHRU
if (found == false)
{
return(ACCESSERROR.ACCESSERROR_NOACCESS);
}
return((atsThru == null) ? ACCESSERROR.ACCESSERROR_NOACCESS : ACCESSERROR.ACCESSERROR_NOACCESSTHRU);
}
private static bool CheckSingleConstraint(CSemanticChecker checker, ErrorHandling errHandling, Symbol symErr, TypeParameterType var, CType arg, TypeArray typeArgsCls, TypeArray typeArgsMeth, CheckConstraintsFlags flags)
{
bool fReportErrors = 0 == (flags & CheckConstraintsFlags.NoErrors);
if (arg.IsOpenTypePlaceholderType())
{
return(true);
}
if (arg.IsErrorType())
{
// Error should have been reported previously.
return(false);
}
if (checker.CheckBogus(arg))
{
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_BogusType, arg);
}
return(false);
}
if (arg.IsPointerType() || arg.isSpecialByRefType())
{
if (fReportErrors)
{
errHandling.Error(ErrorCode.ERR_BadTypeArgument, arg);
}
return(false);
}
if (arg.isStaticClass())
{
if (fReportErrors)
{
checker.ReportStaticClassError(null, arg, ErrorCode.ERR_GenericArgIsStaticClass);
}
return(false);
}
bool fError = false;
if (var.HasRefConstraint() && !arg.IsRefType())
{
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_RefConstraintNotSatisfied, symErr, new ErrArgNoRef(var), arg);
}
fError = true;
}
TypeArray bnds = checker.GetSymbolLoader().GetTypeManager().SubstTypeArray(var.GetBounds(), typeArgsCls, typeArgsMeth);
int itypeMin = 0;
if (var.HasValConstraint())
{
// If we have a type variable that is constrained to a value type, then we
// want to check if its a nullable type, so that we can report the
// constraint error below. In order to do this however, we need to check
// that either the type arg is not a value type, or it is a nullable type.
//
// To check whether or not its a nullable type, we need to get the resolved
// bound from the type argument and check against that.
bool bIsValueType = arg.IsValType();
bool bIsNullable = arg.IsNullableType();
if (bIsValueType && arg.IsTypeParameterType())
{
TypeArray pArgBnds = arg.AsTypeParameterType().GetBounds();
if (pArgBnds.Count > 0)
{
bIsNullable = pArgBnds[0].IsNullableType();
}
}
if (!bIsValueType || bIsNullable)
{
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_ValConstraintNotSatisfied, symErr, new ErrArgNoRef(var), arg);
}
fError = true;
}
// Since FValCon() is set it is redundant to check System.ValueType as well.
if (bnds.Count != 0 && bnds[0].isPredefType(PredefinedType.PT_VALUE))
{
itypeMin = 1;
}
}
for (int j = itypeMin; j < bnds.Count; j++)
{
CType typeBnd = bnds[j];
if (!SatisfiesBound(checker, arg, typeBnd))
{
if (fReportErrors)
{
// The bound isn't satisfied because of a constraint type. Explain to the user why not.
// There are 4 main cases, based on the type of the supplied type argument:
// - reference type, or type parameter known to be a reference type
// - nullable type, from which there is a boxing conversion to the constraint type(see below for details)
// - type variable
// - value type
// These cases are broken out because: a) The sets of conversions which can be used
// for constraint satisfaction is different based on the type argument supplied,
// and b) Nullable is one funky type, and user's can use all the help they can get
// when using it.
ErrorCode error;
if (arg.IsRefType())
{
// A reference type can only satisfy bounds to types
// to which they have an implicit reference conversion
error = ErrorCode.ERR_GenericConstraintNotSatisfiedRefType;
}
else if (arg.IsNullableType() && checker.GetSymbolLoader().HasBaseConversion(arg.AsNullableType().GetUnderlyingType(), typeBnd)) // This is inlining FBoxingConv
{
// nullable types do not satisfy bounds to every type that they are boxable to
// They only satisfy bounds of object and ValueType
if (typeBnd.isPredefType(PredefinedType.PT_ENUM) || arg.AsNullableType().GetUnderlyingType() == typeBnd)
{
// Nullable types don't satisfy bounds of EnumType, or the underlying type of the enum
// even though the conversion from Nullable to these types is a boxing conversion
// This is a rare case, because these bounds can never be directly stated ...
// These bounds can only occur when one type paramter is constrained to a second type parameter
// and the second type parameter is instantiated with Enum or the underlying type of the first type
// parameter
error = ErrorCode.ERR_GenericConstraintNotSatisfiedNullableEnum;
}
else
{
// Nullable types don't satisfy the bounds of any interface type
// even when there is a boxing conversion from the Nullable type to
// the interface type. This will be a relatively common scenario
// so we cal it out separately from the previous case.
Debug.Assert(typeBnd.isInterfaceType());
error = ErrorCode.ERR_GenericConstraintNotSatisfiedNullableInterface;
}
}
else if (arg.IsTypeParameterType())
{
// Type variables can satisfy bounds through boxing and type variable conversions
Debug.Assert(!arg.IsRefType());
error = ErrorCode.ERR_GenericConstraintNotSatisfiedTyVar;
}
else
{
// Value types can only satisfy bounds through boxing conversions.
// Note that the exceptional case of Nullable types and boxing is handled above.
error = ErrorCode.ERR_GenericConstraintNotSatisfiedValType;
}
errHandling.Error(error, new ErrArgRef(symErr), new ErrArg(typeBnd, ErrArgFlags.Unique), var, new ErrArgRef(arg, ErrArgFlags.Unique));
}
fError = true;
}
}
// Check the newable constraint.
if (!var.HasNewConstraint() || arg.IsValType())
{
return(!fError);
}
if (arg.isClassType())
{
AggregateSymbol agg = arg.AsAggregateType().getAggregate();
// Due to late binding nature of IDE created symbols, the AggregateSymbol might not
// have all the information necessary yet, if it is not fully bound.
// by calling LookupAggMember, it will ensure that we will update all the
// information necessary at least for the given method.
checker.GetSymbolLoader().LookupAggMember(checker.GetNameManager().GetPredefName(PredefinedName.PN_CTOR), agg, symbmask_t.MASK_ALL);
if (agg.HasPubNoArgCtor() && !agg.IsAbstract())
{
return(!fError);
}
}
else if (arg.IsTypeParameterType() && arg.AsTypeParameterType().HasNewConstraint())
{
return(!fError);
}
if (fReportErrors)
{
errHandling.ErrorRef(ErrorCode.ERR_NewConstraintNotSatisfied, symErr, new ErrArgNoRef(var), arg);
}
return(false);
}
protected void ErrAppendParentType(CType pType, SubstContext pctx)
{
if (pType.IsErrorType())
{
if (pType.AsErrorType().HasTypeParent())
{
ErrAppendType(pType.AsErrorType().GetTypeParent(), null);
ErrAppendChar('.');
}
else
{
ErrAppendParentCore(pType.AsErrorType().GetNSParent(), pctx);
}
}
else if (pType.IsAggregateType())
{
ErrAppendParentCore(pType.AsAggregateType().GetOwningAggregate(), pctx);
}
else if (pType.GetBaseOrParameterOrElementType() != null)
{
ErrAppendType(pType.GetBaseOrParameterOrElementType(), null);
ErrAppendChar('.');
}
}
