Replaces `ComponentIdentTypeRepr::getIdentifier()` and `getIdLoc()` with `getNameRef()` and `getNameLoc()`, which use `DeclName` and `DeclNameRef` respectively.
This change adds UnresolvedDotExpr::createImplicit() and UnresolvedDeclRefExpr::createImplicit() helpers. These calls simplify several tedious bits of code synthesis that would otherwise become even more tedious with DeclNameRef in the picture.
The semantic checks for CodingKeys are being duplicated across the value witness synthesis code paths. Just synthesize a CodingKeys enum and let validateCodingKeysEnum do the heavy lifting when we actually need to go emit diagnostics.
CodableConformanceType::TypeNotValidated is unused since the InterfaceTypeRequest changes went through. We can just use the validity of the ProtocolConformanceRef here.
This used to be a lot more relevant a long time ago when typeCheckFunctionsAndExternalDecls actually did type check external functions defined in C. Now, it serves no purpose.
The validation order change from just type checking these things eagerly doesn't seem to affect anything.
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.
This is an amalgam of simplifications to the way VarDecls are checked
and assigned interface types.
First, remove TypeCheckPattern's ability to assign the interface and
contextual types for a given var decl. Instead, replace it with the
notion of a "naming pattern". This is the pattern that semantically
binds a given VarDecl into scope, and whose type will be used to compute
the interface type. Note that not all VarDecls have a naming pattern
because they may not be canonical.
Second, remove VarDecl's separate contextual type member, and force the
contextual type to be computed the way it always was: by mapping the
interface type into the parent decl context.
Third, introduce a catch-all diagnostic to properly handle the change in
the way that circularity checking occurs. This is also motivated by
TypeCheckPattern not being principled about which parts of the AST it
chooses to invalidate, especially the parent pattern and naming patterns
for a given VarDecl. Once VarDecls are invalidated along with their
parent patterns, a large amount of this diagnostic churn can disappear.
Unfortunately, if this isn't here, we will fail to catch a number of
obviously circular cases and fail to emit a diagnostic.
Since getSpecifier() now kicks off a request instead of always
returning what was previously set, we can't pass a ParamSpecifier
to the ParamDecl constructor anymore. Instead, callers either
call setSpecifier() if the ParamDecl is synthesized, or they
rely on the request, which can compute the specifier in three
specific cases:
- Ordinary parsed parameters get their specifier from the TypeRepr.
- The 'self' parameter's specifier is based on the self access kind.
- Accessor parameters are either the 'newValue' parameter of a
setter, or a cloned subscript parameter.
For closure parameters with inferred types, we still end up
calling setSpecifier() twice, once to set the initial defalut
value and a second time when applying the solution in the
case that we inferred an 'inout' specifier. In practice this
should not be a big problem because expression type checking
walks the AST in a pre-determined order anyway.
The only place this was used in Decl.h was the failability kind of a
constructor.
I decided to replace this with a boolean isFailable() bit. Now that
we have isImplicitlyUnwrappedOptional(), it seems to make more sense
to not have ConstructorDecl represent redundant information which
might not be internally consistent.
Most callers of getFailability() actually only care if the result is
failable or not; the few callers that care about it being IUO can
check isImplicitlyUnwrappedOptional() as well.
This improves on the previous situation:
- The request ensures that the backing storage for lazy properties
and property wrappers gets synthesized first; previously it was
only somewhat guaranteed by callers.
- Instead of returning a range this just returns an ArrayRef,
which simplifies clients.
- Indexing into the ArrayRef is O(1), which addresses some FIXMEs
in the SIL optimizer.
Instead of requiring that function body synthesizers will always call
setBody(), which is annoyingly stateful, have function body synthesizers
always return the synthesized brace statement along with a bit that
indicates whether the body was already type-checked. This takes us a
step closer to centralizing the mutation of the body of a function.
When synthesizing Codable conformances, the enum case name for a
property with an attached delegate does not have the '$', i.e., it's
the name of the originally-declared property.
Decodable’s init(from:) synthesis sometimes mistook a static property for an identically-named instance property, which could cause it to skip a property or possibly make other mistakes. This change factors a common helper function from encode(to:) and init(from:) synthesis which implements the right logic for both.
Parsed declarations would create an untyped 'self' parameter;
synthesized, imported and deserialized declarations would get a
typed one.
In reality the type, if any, depends completely on the properties
of the function in question, so we can just lazily create the
'self' parameter when needed.
If the function already has a type, we give it a type right there;
otherwise, we check if a 'self' was already created when we
compute a function's type and set the type of 'self' then.
- getAsDeclOrDeclExtensionContext -> getAsDecl
This is basically the same as a dyn_cast, so it should use a 'getAs'
name like TypeBase does.
- getAsNominalTypeOrNominalTypeExtensionContext -> getSelfNominalTypeDecl
- getAsClassOrClassExtensionContext -> getSelfClassDecl
- getAsEnumOrEnumExtensionContext -> getSelfEnumDecl
- getAsStructOrStructExtensionContext -> getSelfStructDecl
- getAsProtocolOrProtocolExtensionContext -> getSelfProtocolDecl
- getAsTypeOrTypeExtensionContext -> getSelfTypeDecl (private)
These do /not/ return some form of 'this'; instead, they get the
extended types when 'this' is an extension. They started off life with
'is' names, which makes sense, but changed to this at some point. The
names I went with match up with getSelfInterfaceType and
getSelfTypeInContext, even though strictly speaking they're closer to
what getDeclaredInterfaceType does. But it didn't seem right to claim
that an extension "declares" the ClassDecl here.
- getAsProtocolExtensionContext -> getExtendedProtocolDecl
Like the above, this didn't return the ExtensionDecl; it returned its
extended type.
This entire commit is a mechanical change: find-and-replace, followed
by manual reformatted but no code changes.
There are two general constructor forms here:
- One took the number of parameter lists, to be filled in later.
Now, this takes a boolean indicating if there is an implicit
'self'.
- The other one took the actual parameter lists and filled them
in right away. This now takes a separate 'self' ParamDecl and
ParameterList.
Instead of storing the number of parameter lists, an
AbstractFunctionDecl now only needs to store if there is a 'self'
or not.
I've updated most places that construct AbstractFunctionDecls to
properly use these new forms. In the ClangImporter, there is
more code that remains to be untangled, so we continue to build
multiple ParameterLists and unpack them into a ParamDecl and
ParameterList at the last minute.
