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Replace nominal type descriptors with a hierarchy of context descriptors.

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This new format more efficiently represents existing information, while
more accurately encoding important information about nested generic
contexts with same-type and layout constraints that need to be evaluated
at runtime. It's also designed with an eye to forward- and
backward-compatible expansion for ABI stability with future Swift
versions.
This commit is contained in:
Joe Groff
2017-12-12 09:57:36 -08:00
parent 9ac1dc80b0
commit a7a3b17597
58 changed files with 3418 additions and 1291 deletions
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12
stdlib/public/SwiftRemoteMirror/SwiftRemoteMirror.cpp
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@@ -67,8 +67,12 @@ swift_reflection_readIsaMask(SwiftReflectionContextRef ContextRef,
uintptr_t *outIsaMask) {
auto Context = reinterpret_cast<NativeReflectionContext *>(ContextRef);
auto isaMask = Context->readIsaMask();
*outIsaMask = isaMask.second;
return isaMask.first;
if (isaMask) {
*outIsaMask = *isaMask;
return true;
}
*outIsaMask = 0;
return false;
}
swift_typeref_t
@@ -84,9 +88,9 @@ swift_reflection_typeRefForInstance(SwiftReflectionContextRef ContextRef,
uintptr_t Object) {
auto Context = reinterpret_cast<NativeReflectionContext *>(ContextRef);
auto MetadataAddress = Context->readMetadataFromInstance(Object);
if (!MetadataAddress.first)
if (!MetadataAddress)
return 0;
auto TR = Context->readTypeFromMetadata(MetadataAddress.second);
auto TR = Context->readTypeFromMetadata(*MetadataAddress);
return reinterpret_cast<swift_typeref_t>(TR);
}