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AST: Repent for my sins by adding new assertions

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Since the previous fix is essentially a hack to dodge an
assertion, I'm adding stronger assertions to
AbstractTypeParamDecl::getSuperclass() and
getConformingProtocols().
This commit is contained in:
Slava Pestov
2017-03-30 00:55:58 -07:00
parent f10f00d887
commit a79ef97c32
1 changed files with 8 additions and 4 deletions
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12
lib/AST/Decl.cpp
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@@ -2316,8 +2316,10 @@ UnboundGenericType *TypeAliasDecl::getUnboundGenericType() const {
}
Type AbstractTypeParamDecl::getSuperclass() const {
auto *dc = getDeclContext();
auto contextTy = dc->mapTypeIntoContext(getDeclaredInterfaceType());
auto *genericEnv = getDeclContext()->getGenericEnvironmentOfContext();
assert(genericEnv != nullptr && "Too much circularity");
auto contextTy = genericEnv->mapTypeIntoContext(getDeclaredInterfaceType());
if (auto *archetype = contextTy->getAs<ArchetypeType>())
return archetype->getSuperclass();
@@ -2327,8 +2329,10 @@ Type AbstractTypeParamDecl::getSuperclass() const {
ArrayRef<ProtocolDecl *>
AbstractTypeParamDecl::getConformingProtocols() const {
auto *dc = getDeclContext();
auto contextTy = dc->mapTypeIntoContext(getDeclaredInterfaceType());
auto *genericEnv = getDeclContext()->getGenericEnvironmentOfContext();
assert(genericEnv != nullptr && "Too much circularity");
auto contextTy = genericEnv->mapTypeIntoContext(getDeclaredInterfaceType());
if (auto *archetype = contextTy->getAs<ArchetypeType>())
return archetype->getConformsTo();