In override completion, we didn't use to emit 'class var' with the initial
expression. However, having initial expression does not have any bearing
on whether the declaration is overridable or not.
- Use `performParseAndResolveImportsOnly()` to invoke the frontend
- Do `bindExtensions()` in `ide::typeCheckContextUntil()`
- Typecheck preceding `TopLevelCodeDecl`s only if the compleiton is in
a `TopLevelCodeDecl`
- Other related tweaks
rdar://problem/56636747
This seems more correct than OtherModule, and means they're treated as
low-priority results for the session-based completion APIs. With default
options that means won't be shown in global completion results but will be
once there's some matching filter text. It also sorts them below any symbols
that actually come from other modules, which is desirable, since most symbols
don't need to be module qualified.
The SemanticContextKind change doesn't seem to affect Xcode's handling of the
results.
Previously delayed parsing was performed by AST walker
'ParseDelayedFunctionBodies' by finding "delayed" function decl from the AST
of the whole module. This is not necessary. Optimize it by remembering the
"delayed" function decl in 'PersistentParserState'.
NOTE: 'SourceLoader' stopped using this delayed parsing mechanism in
d8b745db77
rdar://problem/56819166
Patch up all the places that are making a syntactic judgement about the
isInvalid() bit in a ValueDecl. They may continue to use that query,
but most guard themselves on whether the interface type has been set.
ProtocolConformanceRef already has an invalid state. Drop all of the
uses of Optional<ProtocolConformanceRef> and just use
ProtocolConformanceRef::forInvalid() to represent it. Mechanically
translate all of the callers and callsites to use this new
representation.
Switch most callers to explicit indices. The exceptions lie in things that needs to manipulate the parsed output directly including the Parser and components of the ASTScope. These are included as friend class exceptions.
TypeCheckPattern used to splat the interface type into this, and
different parts of the compiler would check one or the other. There is
now one source of truth: The interface type. The type repr is now just
a signal that the user has written an explicit type annotation on
a parameter. For variables, we will eventually be able to just grab
this information from the parent pattern.
