/*****************************************************************************
;ValidateHandlesLists
Given Method() Handles X1.SomeEvent
1. verify that X1 is a valid WithEvents variable
2. verify that X1 sources SomeEvent()
*****************************************************************************/
void
Bindable::ValidateAndHookUpHandles
(
BCSYM_HandlesList *HandlesEntry,
BCSYM_MethodImpl *HandlingMethod
)
{
VSASSERT( !HandlesEntry->IsBad(), "Bad handles unexpected here!!");
VSASSERT( CurrentContainer()->IsClass(),
"Non-classes/non-structures/non-modules cannot have handles clauses!!");
// Dev10#489103: if the handling method is bad, then we can't really tell whether it handles the event:
if (HandlingMethod->IsBadParamTypeOrReturnType())
{
HandlesEntry->SetIsBad();
return;
}
Symbols
SymbolFactory(
CurrentCompilerInstance(),
CurrentAllocator(),
NULL,
CurrentGenericBindingCache());
BCSYM_Class *ContainerOfHandlingMethod = CurrentContainer()->PClass();
BCSYM *TypeToFindEventIn;
BCSYM_Property *EventSourceProperty = NULL;
BCSYM_Property *WithEventsProperty;
BCSYM *InstanceTypeThroughWhichEventIsAccessed;
if (HandlesEntry->IsMyBase())
{
TypeToFindEventIn = TypeHelpers::GetBaseClass(ContainerOfHandlingMethod, SymbolFactory);
// A bad base is no base
if (!TypeToFindEventIn)
{
HandlesEntry->SetIsBad();
return;
}
InstanceTypeThroughWhichEventIsAccessed = ContainerOfHandlingMethod;
}
else if (HandlesEntry->IsEventFromMeOrMyClass())
{
if (ContainerOfHandlingMethod->IsGeneric())
{
TypeToFindEventIn =
SynthesizeOpenGenericBinding(
ContainerOfHandlingMethod,
SymbolFactory);
}
else
{
TypeToFindEventIn = ContainerOfHandlingMethod;
}
InstanceTypeThroughWhichEventIsAccessed = ContainerOfHandlingMethod;
}
else
{
WithEventsProperty = HandlesEntry->GetWithEventsProperty();
VSASSERT( WithEventsProperty,
"How can a non-bad handles entry not have a withevents property ?");
BCSYM_Variable *WithEventsVar = WithEventsProperty->CreatedByWithEventsDecl();
VSASSERT( WithEventsVar,
"How can a non-bad handles entry not refer to a withevents var ?");
if (WithEventsVar->IsBad() ||
WithEventsVar->IsBadVariableType())
{
HandlesEntry->SetIsBad();
return;
}
BCSYM *TypeOfWithEventsVar = WithEventsProperty->GetType();
VSASSERT( TypeOfWithEventsVar->IsContainer() ||
(TypeOfWithEventsVar->IsGenericParam() &&
TypeOfWithEventsVar->PGenericParam()->IsReferenceType()),
"What else can the type of a withevents variable be ?");
if (HandlesEntry->GetEventSourcePropertyName())
{
// If withevents variable type is type parameter, then search in its class constraint,
// else search in the withevents variable type itself.
//
EventSourceProperty =
GetEventSourceProperty(
TypeOfWithEventsVar,
HandlesEntry->GetEventSourcePropertyName());
if (!EventSourceProperty)
{
// "'Handles' must specify a 'WithEvents' variable or 'MyBase' qualified with a single identifier."
ReportErrorOnSymbol(
IsStdModule(CurrentContainer()) ?
ERRID_HandlesSyntaxInModule :
ERRID_HandlesSyntaxInClass,
CurrentErrorLog(HandlingMethod),
HandlesEntry);
HandlesEntry->SetIsBad();
return;
}
//
HandlesEntry->SetEventSourceProperty(EventSourceProperty);
//
VSASSERT( EventSourceProperty->GetType()->IsContainer(),
"Referring Property - What else can a type that is not a named type be ?");
TypeToFindEventIn = EventSourceProperty->GetType();
}
else
{
TypeToFindEventIn = TypeOfWithEventsVar;
}
InstanceTypeThroughWhichEventIsAccessed = TypeToFindEventIn;
}
VSASSERT( TypeToFindEventIn, "No type to find the event in ?");
bool IsBadName;
BCSYM_NamedRoot *EventDecl =
Semantics::EnsureNamedRoot
(
Semantics::InterpretName
(
HandlesEntry->GetEventName(),
*(HandlesEntry->GetLocationOfEvent()),
TypeToFindEventIn->IsContainer() ?
TypeToFindEventIn->PContainer()->GetHash() :
NULL,
TypeToFindEventIn->IsGenericParam() ?
TypeToFindEventIn->PGenericParam() :
NULL,
NameSearchIgnoreParent | NameSearchEventReference | NameSearchIgnoreExtensionMethods,
InstanceTypeThroughWhichEventIsAccessed,
ContainerOfHandlingMethod->GetHash(), // Current Context
CurrentErrorLog(HandlingMethod),
CurrentCompilerInstance(),
CurrentCompilerHost(),
m_CompilationCaches,
CurrentSourceFile(HandlingMethod),
false, // don't perform obsolete checks
IsBadName,
NULL, // the binding context is not required here since the synthesized
// code has the withevents variable from which the type binding
// information is obtained
NULL,
-1
)
);
if (IsBadName)
{
HandlesEntry->SetIsBad();
return;
}
if (!EventDecl || !EventDecl->IsEventDecl())
{
ReportErrorAtLocation(
ERRID_EventNotFound1,
CurrentErrorLog(HandlingMethod),
HandlesEntry->GetLocationOfEvent(),
HandlesEntry->GetEventName());
HandlesEntry->SetIsBad();
return;
}
if (EventDecl->IsBad())
{
HandlesEntry->SetIsBad();
return;
}
BCSYM_EventDecl *Event = EventDecl->PEventDecl();
HandlesEntry->SetEvent(Event);
// [....] - 11/17/2005
// See Bug # 544269
// The call to ResolveAllNamedTypesForContainer needed to be replaced with a call
// to ResolveShadowingOverloadingAndOverridingForContainer because event signatures
// are not necessarily setup untill after ResolveShadowingOverloadingAndOverriding
// has been called.
// Go and bind the event we are comparing against up to the state we need for
// validating handles.
ResolveShadowingOverloadingOverridingAndCheckGenericsForContainer(Event->GetContainer(), m_CompilationCaches);
// Check for bad param types here (VSW#172753).
if (Event->GetDelegate() &&
Event->GetDelegate()->IsContainer() &&
DefinedInMetaData(Event->GetDelegate()->PContainer()))
{
for (BCSYM_Param *Param = Event->GetFirstParam();
Param;
Param = Param->GetNext())
{
if (Param->GetType()->IsBad())
{
Param->GetType()->PNamedRoot()->ReportError(
CurrentCompilerInstance(),
CurrentErrorLog(HandlingMethod),
HandlesEntry->GetLocationOfEvent());
HandlesEntry->SetIsBad();
return;
}
}
}
BCSYM_GenericBinding *EventGenericBindingContext =
DeriveGenericBindingForMemberReference(TypeToFindEventIn, Event, SymbolFactory, CurrentCompilerHost());
MethodConversionClass MethodConversion = Semantics::ClassifyMethodConversion(
HandlingMethod,
GenericBindingInfo(),
Event,
EventGenericBindingContext,
false, //IgnoreReturnValueErrorsForInference
&SymbolFactory,
CurrentCompilerHost());
SourceFile * SourceFile = HandlingMethod->GetSourceFile();
if (!Semantics::IsSupportedMethodConversion(
SourceFile->GetOptionFlags() & OPTION_OptionStrict,
MethodConversion))
{
// "Method '|1' cannot handle Event '|2' because they do not have the same signature."
StringBuffer HandlingMethodRepresentation;
HandlingMethod->GetBasicRep(CurrentCompilerInstance(), NULL, &HandlingMethodRepresentation);
StringBuffer EventRepresentation;
Event->GetBasicRep(CurrentCompilerInstance(), NULL, &EventRepresentation, EventGenericBindingContext);
ReportErrorAtLocation(
ERRID_EventHandlerSignatureIncompatible2,
CurrentErrorLog(HandlingMethod),
HandlesEntry->GetLocationOfEvent(),
HandlingMethodRepresentation.GetString(),
EventRepresentation.GetString());
HandlesEntry->SetIsBad();
return;
}
// Hook up handlers to the events they specify in their handles clauses
if (HandlesEntry->IsMyBase() ||
HandlesEntry->IsEventFromMeOrMyClass())
{
// For these cases, we search for valid MyBase, Me, MyClass handles clauses and set up the
// addhandlers in all constructors that directly call a base constructor. This is done in
// semantics in initializefields because that is when the information whether it directly
// calls the base constructor is known.
//
const bool BuildSharedConstructor = true;
if (HandlesEntry->GetEvent()->IsShared() &&
HandlingMethod->IsShared())
{
// Make sure a shared constructor is present, else synthesize one
if (!ContainerOfHandlingMethod->GetSharedConstructor(CurrentCompilerInstance()))
{
// Synthesize one
SynthesizeConstructor(BuildSharedConstructor);
}
}
else
{
// Make sure an Instance constructor is present, else synthesize one
if (!ContainerOfHandlingMethod->GetFirstInstanceConstructor(CurrentCompilerInstance()))
{
// Synthesize one
SynthesizeConstructor(!BuildSharedConstructor);
}
}
}
else
{
VSASSERT( WithEventsProperty->SetProperty(),
"How can there be no set accessor for a withevents property ?");
if (WithEventsProperty->IsShared() &&
!HandlingMethod->IsShared())
{
// "Events of shared WithEvents variables cannot be handled by non-shared methods."
ReportErrorAtLocation(
ERRID_SharedEventNeedsSharedHandler,
CurrentErrorLog(HandlingMethod),
HandlesEntry->GetLocationOfWithEventsVar());
HandlesEntry->SetIsBad();
return;
}
//
// hookup the handler list info for the above handles entry on to the WithEvents_Set.
// GenWithEventsSetCode() will write synthetic code for these later
//
WithEventsProperty->SetProperty()->AddToHandlerList(
HandlingMethod,
Event,
EventGenericBindingContext,
EventSourceProperty,
CurrentAllocator());
}
}
void
Bindable::ValidateWithEventsVarsInHandlesListsAndSynthesizePropertiesIfRequired()
{
BCSYM_Container *ContainerOfHandlingMethods = CurrentContainer();
if (!IsClass(ContainerOfHandlingMethods) &&
!IsStructure(ContainerOfHandlingMethods) &&
!IsStdModule(ContainerOfHandlingMethods))
{
return;
}
Symbols
SymbolFactory(
CurrentCompilerInstance(),
CurrentAllocator(),
NULL,
CurrentGenericBindingCache());
BCITER_CHILD Members(ContainerOfHandlingMethods);
while(BCSYM_NamedRoot *Member = Members.GetNext())
{
// only method implementations can have handles clauses
if (!Member->IsMethodImpl())
{
continue;
}
BCSYM_Proc *Proc = Member->PProc();
BCITER_Handles iterHandles(Member->PMethodImpl());
BCSYM_HandlesList *Handles = iterHandles.GetNext();
if (!Handles)
{
continue;
}
ErrorTable *ErrorLog = CurrentErrorLog(Proc);
for(;
Handles;
Handles = iterHandles.GetNext())
{
if (Handles->IsMyBase() ||
Handles->IsEventFromMeOrMyClass())
{
continue;
}
bool FoundInBase;
BCSYM_Variable *WithEventsVar =
GetWithEventsVarReferredToInHandlesClause(
Handles,
FoundInBase);
if (!WithEventsVar)
{
// "Handles clause requires a WithEvents variable."
ReportErrorAtLocation(
ERRID_NoWithEventsVarOnHandlesList,
ErrorLog,
Handles->GetLocationOfWithEventsVar());
Handles->SetIsBad();
}
else if (WithEventsVar->IsBad() ||
WithEventsVar->IsBadVariableType() || // the type of the variable is good, but is not a class or interface
WithEventsVar->GetType()->IsBad()) // the type of the variable is bad
{
// Any metadata errors on a symbol should be reported at the location
// the symbol is used in source code
//
if (DefinedInMetaData(WithEventsVar->GetContainer()))
{
VSASSERT( !DefinedInMetaData(CurrentContainer()),
"How can Current Context for handles clauses not be in VB Source Code ?!");
WithEventsVar->ReportError(
CurrentCompilerInstance(),
ErrorLog,
Handles->GetLocationOfWithEventsVar());
}
Handles->SetIsBad();
}
else
{
// get the withevents property if possible
BCSYM_Property *WithEventsProperty =
GetWithEventsPropertyForWithEventsVariable(WithEventsVar->PVariable());
// Create it if it doesn't exist (for handling events defined on
// WithEvent vars that exist on a base class).
//
if (!WithEventsProperty)
{
VSASSERT(FoundInBase,
"Why do we have to synthesize a property for a withevents variable in the current class ? It should already have been synthesized in declared!!");
WithEventsProperty =
SynthesizeWithEventsProperty(WithEventsVar->PVariable(), SymbolFactory);
WithEventsProperty->SetCreatedByHandlesClause(Handles);
}
Handles->SetWithEventsProperty(WithEventsProperty);
}
}
}
}
BCSYM_Property*
Bindable::SynthesizeWithEventsProperty
(
BCSYM_Variable *WithEventsVar,
Symbols &SymbolFactory
)
{
VSASSERT(CurrentContainer()->IsClass(),
"why would a non-class need to synthesize withevents properties ?");
BCSYM_Class *Class = CurrentContainer()->PClass();
BCSYM_Property *WithEventsProperty;
WithEventsProperty =
Declared::BuildWithEventsProperty(
WithEventsVar->PVariable(),
DeriveGenericBindingForMemberReference(
IsGenericOrHasGenericParent(CurrentContainer()) ?
(BCSYM *)SynthesizeOpenGenericBinding(Class, SymbolFactory) :
CurrentContainer(),
WithEventsVar,
SymbolFactory,
CurrentCompilerHost()),
&SymbolFactory,
// note to GenSyntheticCode() that generated code should call the base class.
// Always safe because we only get here if we tried to handle an event that
// was defined in a base class of the current one
//
true,
Class->IsStdModule(),
CurrentCompilerInstance(),
NULL, // No symbols list to put the property in, we put it in the hash manually below
NULL); // No symbols list to put the get, set in, we put it in the hash manually below
WithEventsProperty->SetMemberThatCreatedSymbol(WithEventsVar);
WithEventsProperty->GetProperty()->SetMemberThatCreatedSymbol(WithEventsVar);
WithEventsProperty->SetProperty()->SetMemberThatCreatedSymbol(WithEventsVar);
// Add the Property to the container's hash
//
Symbols::AddSymbolToHash(
Class->GetHash(),
WithEventsProperty,
true, // set the parent of this member
Class->IsStdModule(),
false); // container is not namespace
VSASSERT( Class->GetUnBindableChildrenHash(),
"How can a class not have an unbindable members hash ?");
// Add the get accessor of the Property to the container's unbindable members hash
//
Symbols::AddSymbolToHash(
Class->GetUnBindableChildrenHash(),
WithEventsProperty->GetProperty(),
true, // set the parent of this member
Class->IsStdModule(),
false); // container is not namespace
// Add the set accessor of the Property to the container's unbindable members hash
//
Symbols::AddSymbolToHash(
Class->GetUnBindableChildrenHash(),
WithEventsProperty->SetProperty(),
true, // set the parent of this member
Class->IsStdModule(),
false); // container is not namespace
#if IDE
// Add these to the list of symbols created in bindable.
// This list is used to delete these from their respective hashes during decompilation
// from bindable.
//
SymbolFactory.GetAliasOfSymbol(
WithEventsProperty,
ACCESS_Private,
CurrentContainer()->GetBindableSymbolList());
SymbolFactory.GetAliasOfSymbol(
WithEventsProperty->GetProperty(),
ACCESS_Private,
CurrentContainer()->GetBindableSymbolList());
SymbolFactory.GetAliasOfSymbol(
WithEventsProperty->SetProperty(),
ACCESS_Private,
CurrentContainer()->GetBindableSymbolList());
#endif
return WithEventsProperty;
}
void ComClassMembersInAContainer::Init
(
BCSYM_Container *pContainer
)
{
// Free the memory.
m_nra.FreeHeap();
if (pContainer != NULL)
{
BCITER_CHILD bichild(pContainer);
unsigned cMembers = 0;
BCSYM_NamedRoot *pRoot;
BCSYM_NamedRoot **ppRoot;
while (pRoot = bichild.GetNext())
{
if (!Filter(pRoot))
continue;
cMembers++;
if (pRoot->IsProperty())
{
BCSYM_Property *pProperty = pRoot->PProperty();
if (pProperty->GetProperty() && Filter(pProperty->GetProperty()))
{
cMembers++;
}
if (pProperty->SetProperty() && Filter(pProperty->SetProperty()))
{
cMembers++;
}
}
}
IfFalseThrow(cMembers + 1 > cMembers);
ppRoot = m_ppRoot = m_ppNext = (BCSYM_NamedRoot **)m_nra.Alloc(VBMath::Multiply(
(cMembers + 1),
sizeof(BCSYM_NamedRoot *)));
m_count = cMembers;
bichild.Init(pContainer);
while (pRoot = bichild.GetNext())
{
if (!Filter(pRoot))
continue;
*ppRoot = pRoot;
ppRoot++;
if (pRoot->IsProperty())
{
BCSYM_Property *pProperty = pRoot->PProperty();
if (pProperty->GetProperty() && Filter(pProperty->GetProperty()))
{
*ppRoot = pProperty->GetProperty();
ppRoot++;
}
if (pProperty->SetProperty() && Filter(pProperty->SetProperty()))
{
*ppRoot = pProperty->SetProperty();
ppRoot++;
}
}
}
// Sort the list in slot number then file definition order.
extern int _cdecl SortSymbolsByLocation(const void *arg1, const void *arg2);
qsort(m_ppNext, ppRoot - m_ppNext, sizeof(BCSYM_NamedRoot *), SortSymbolsByLocation);
}
else
{
m_count = 0;
m_ppNext = NULL;
m_ppRoot = NULL;
}
}
