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[NFC] Adopt TypeBase-isms for GenericSignature

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Structurally prevent a number of common anti-patterns involving generic
signatures by separating the interface into GenericSignature and the
implementation into GenericSignatureBase.  In particular, this allows
the comparison operators to be deleted which forces callers to
canonicalize the signature or ask to compare pointers explicitly.
This commit is contained in:
Robert Widmann
2019-09-29 23:06:49 -07:00
parent d1c87f3c93
commit 5a8d0744c3
104 changed files with 780 additions and 631 deletions
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7
lib/Sema/CSDiagnostics.cpp
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@@ -388,7 +388,8 @@ ValueDecl *RequirementFailure::getDeclRef() const {
do {
if (auto *parent = DC->getAsDecl()) {
if (auto *GC = parent->getAsGenericContext()) {
if (GC->getGenericSignature() != Signature)
// FIXME: Is this intending an exact match?
if (GC->getGenericSignature().getPointer() != Signature.getPointer())
continue;
// If this is a signature if an extension
@@ -410,7 +411,7 @@ ValueDecl *RequirementFailure::getDeclRef() const {
return getAffectedDeclFromType(getOwnerType());
}
GenericSignature *RequirementFailure::getSignature(ConstraintLocator *locator) {
GenericSignature RequirementFailure::getSignature(ConstraintLocator *locator) {
if (isConditional())
return Conformance->getGenericSignature();
@@ -436,7 +437,7 @@ const DeclContext *RequirementFailure::getRequirementDC() const {
auto *DC = AffectedDecl->getDeclContext();
do {
if (auto *sig = DC->getGenericSignatureOfContext()) {
if (auto sig = DC->getGenericSignatureOfContext()) {
if (sig->isRequirementSatisfied(req))
return DC;
}