SubclassScope SILDeclRef::getSubclassScope() const {
if (!hasDecl())
return SubclassScope::NotApplicable;
// If this declaration is a function which goes into a vtable, then it's
// symbol must be as visible as its class, because derived classes have to put
// all less visible methods of the base class into their vtables.
if (auto *CD = dyn_cast<ConstructorDecl>(getDecl()))
if (!CD->isRequired())
return SubclassScope::NotApplicable;
auto *FD = dyn_cast<FuncDecl>(getDecl());
if (!FD)
return SubclassScope::NotApplicable;
DeclContext *context = FD->getDeclContext();
// Methods from extensions don't go into vtables (yet).
if (isa<ExtensionDecl>(context))
return SubclassScope::NotApplicable;
// Various forms of thunks don't either.
if (isThunk() || isForeign)
return SubclassScope::NotApplicable;
// Default arg generators are not visible.
if (isDefaultArgGenerator())
return SubclassScope::NotApplicable;
auto *classType = context->getSelfClassDecl();
if (!classType || classType->isFinal())
return SubclassScope::NotApplicable;
if (FD->isFinal())
return SubclassScope::NotApplicable;
assert(FD->getEffectiveAccess() <= classType->getEffectiveAccess() &&
"class must be as visible as its members");
// FIXME: This is too narrow. Any class with resilient metadata should
// probably have this, at least for method overrides that don't add new
// vtable entries.
if (classType->isResilient())
return SubclassScope::Resilient;
switch (classType->getEffectiveAccess()) {
case AccessLevel::Private:
case AccessLevel::FilePrivate:
return SubclassScope::NotApplicable;
case AccessLevel::Internal:
case AccessLevel::Public:
return SubclassScope::Internal;
case AccessLevel::Open:
return SubclassScope::External;
}
llvm_unreachable("Unhandled access level in switch.");
}
SubclassScope SILDeclRef::getSubclassScope() const {
if (!hasDecl())
return SubclassScope::NotApplicable;
// If this declaration is a function which goes into a vtable, then it's
// symbol must be as visible as its class. Derived classes even have to put
// all less visible methods of the base class into their vtables.
auto *FD = dyn_cast<AbstractFunctionDecl>(getDecl());
if (!FD)
return SubclassScope::NotApplicable;
DeclContext *context = FD->getDeclContext();
// Methods from extensions don't go into vtables (yet).
if (context->isExtensionContext())
return SubclassScope::NotApplicable;
// Various forms of thunks don't either.
if (isThunk() || isForeign)
return SubclassScope::NotApplicable;
// Default arg generators only need to be visible in Swift 3.
if (isDefaultArgGenerator() && !context->getASTContext().isSwiftVersion3())
return SubclassScope::NotApplicable;
auto *classType = context->getSelfClassDecl();
if (!classType || classType->isFinal())
return SubclassScope::NotApplicable;
if (FD->isFinal())
return SubclassScope::NotApplicable;
assert(FD->getEffectiveAccess() <= classType->getEffectiveAccess() &&
"class must be as visible as its members");
switch (classType->getEffectiveAccess()) {
case AccessLevel::Private:
case AccessLevel::FilePrivate:
return SubclassScope::NotApplicable;
case AccessLevel::Internal:
case AccessLevel::Public:
return SubclassScope::Internal;
case AccessLevel::Open:
return SubclassScope::External;
}
llvm_unreachable("Unhandled access level in switch.");
}
SubclassScope SILDeclRef::getSubclassScope() const {
if (!hasDecl())
return SubclassScope::NotApplicable;
auto *decl = getDecl();
if (!isa<AbstractFunctionDecl>(decl))
return SubclassScope::NotApplicable;
// If this declaration is a function which goes into a vtable, then it's
// symbol must be as visible as its class, because derived classes have to put
// all less visible methods of the base class into their vtables.
if (auto *CD = dyn_cast<ConstructorDecl>(decl)) {
// Initializing entry points do not appear in the vtable.
if (kind == SILDeclRef::Kind::Initializer)
return SubclassScope::NotApplicable;
// Non-required convenience inits do not apper in the vtable.
if (!CD->isRequired() && !CD->isDesignatedInit())
return SubclassScope::NotApplicable;
} else if (isa<DestructorDecl>(decl)) {
// Detructors do not appear in the vtable.
return SubclassScope::NotApplicable;
} else {
assert(isa<FuncDecl>(decl));
}
DeclContext *context = decl->getDeclContext();
// Methods from extensions don't go in the vtable.
if (isa<ExtensionDecl>(context))
return SubclassScope::NotApplicable;
// Various forms of thunks don't either.
if (isThunk() || isForeign)
return SubclassScope::NotApplicable;
// Default arg generators don't go in the vtable.
if (isDefaultArgGenerator())
return SubclassScope::NotApplicable;
// Only non-final methods in non-final classes go in the vtable.
auto *classType = context->getSelfClassDecl();
if (!classType || classType->isFinal())
return SubclassScope::NotApplicable;
if (decl->isFinal())
return SubclassScope::NotApplicable;
assert(decl->getEffectiveAccess() <= classType->getEffectiveAccess() &&
"class must be as visible as its members");
// FIXME: This is too narrow. Any class with resilient metadata should
// probably have this, at least for method overrides that don't add new
// vtable entries.
if (classType->isResilient()) {
if (isa<ConstructorDecl>(decl))
return SubclassScope::NotApplicable;
return SubclassScope::Resilient;
}
switch (classType->getEffectiveAccess()) {
case AccessLevel::Private:
case AccessLevel::FilePrivate:
return SubclassScope::NotApplicable;
case AccessLevel::Internal:
case AccessLevel::Public:
return SubclassScope::Internal;
case AccessLevel::Open:
return SubclassScope::External;
}
llvm_unreachable("Unhandled access level in switch.");
}