Factor out the trailing storage of call arguments, since we'll need it
for a few different kinds of expression nodes. Use it for both
CallExpr (which already had this storage, albeit with a specialized
implementation) and now SubscriptExpr.
Yet another step on the way to SE-0111, capture the argument labels
(and their locations) directly in CallExpr, rather than depending on
them being part of the tuple argument.
When we are type-checking calls, subscripts, or other call-like
expressions, use the argument labels provided by the various
expression nodes rather than those encoded in the tuple type. This
means that argument label matching now matches the callee
declaration's argument labels against the argument labels, without
relying on encoding the argument labels within types in the AST.
This refactor is a stepping stone torward SE-0111.
Introduce several new factory methods to create CallExprs, and hide
the constructor. The primary reason for this refactor is to start
moving clients over to the factory method that takes the call
arguments separately from the argument labels. Internally, it
repackages those arguments into a TupleExpr or ParenExpr (as
appropriate) so the result ASTs are the same. However, this will make
it easier for us to tease out the arguments themselves in the
implementation of SE-0111.
If something isn't a class or bridgeable by value or error bridging, we can still fall back to universal bridging by the runtime. Make this available for manual use by an explicit `as AnyObject` cast.
This is needed for declaration-based resolution subscript expressions,
which is the basis for implementing default arguments in subscripts as
well as declaration-based argument labels.
Rather than synthesizing a global operator '==' for Equatable enums,
synthesize a member operator, which is more idiomatic and much
cleaner.
To make sure that these synthesized operators can actually be found,
start considering operator requirements in protocols
more generally in the type checker, so that, e.g., "myEnum == myEnum"
will type-check against Equatable.== and, on successful type-check,
will call the (newly-synthesized) witness for '=='. This both makes it
easier to make sure we find the operators in, e.g., complex multi-file
and lazy-type checking scenarios, and is a step toward the
type-checking improvements described in SE-0091.
This removes the logic which issued warnings when accessing enum
elements as instance members (SE-0036), making room for a new
implementation that will issue errors instead.
This reverts commit ae1058a39a.
This reverts commit dc24c2bd34.
Turns out Chris fixed the build but when I was looking at the bots, his fix had
not been tested yet, so I thought the tree was still red and was trying to
revert to green.
In Swift, default arguments are associated with a function or
initializer's declaration---not with its type. This was not always the
case, and TupleType's ability to store a default argument kind is a
messy holdover from those dark times.
Eliminate the default argument kind from TupleType, which involves
migrating a few more clients over to declaration-centric handling of
default arguments. Doing so is usually a bug-fix anyway: without the
declaration, one didn't really have
The SILGen test changes are due to a name-mangling fix that fell out
of this change: a tuple type is mangled differently than a non-tuple
type, and having a default argument would make the parameter list of a
single-parameter function into a tuple type. Hence,
func foo(x: Int = 5)
would get a different mangling from
func foo(x: Int)
even though we didn't actually allow overloading.
Fixes rdar://problem/24016341, and helps us along the way to SE-0111
(removing the significance of argument labels) because argument labels
are also declaration-centric, and need the same information.
change includes both the necessary protocol updates and the deprecation
warnings
suitable for migration. A future patch will remove the renamings and
make this
a hard error.
A given Objective-C error enum, which is effectively an NS_ENUM that
specifies its corresponding error domain, will now be mapped to an
ErrorProtocol-conforming struct that wraps an NSError, much like
NSCocoaError does. The actual enum is mapped to a nested "Code"
enum. For example, CoreLocation's CLError becomes:
struct CLError : ErrorProtocol {
let _nsError: NSError
// ...
@objc enum Code : Int {
case ...
}
}
This implements bullet (2) in the proposed solution of SE-0112, so
that Cocoa error types are mapped into structures that maintain the
underlying NSError to allow more information to be extracted from it.
Introduce bridging of NSError to ErrorProtocol, so an Objective-C API
expressed via an "NSError *" will be imported using ErrorProtocol in
the Swift. For example, the Objective-C method:
- (void)handleError:(NSError *)error userInteractionPermitted:(BOOL)userInteractionPermitted;
will now be imported as:
func handleError(_ error: ErrorProtocol, userInteractionPermitted: Bool)
This is bullet (3) under the proposed solution of SE-0112. Note that
we made one semantic change here: instead of removing the conformance
of NSError to ErrorProtocol, which caused numerous problems both
theoretical and actual because the model expects that an NSError
conforms to ErrorProtocol without requiring wrapping, we instead limit
the ErrorProtocol -> NSError conversion that would be implied by
bridging. This is defensible in the short term because it also
eliminates the implicit conversion, and aligns with SE-0072, which
eliminates implicit bridging conversions altogether.
The Clang attribute allows one to state that a particular enumeration
type describes an error, and associates it with a particular domain
constant. However, due to lack of API notes support, this attribute
wasn't actually getting used. Instead, we had a number of explicit
extensions to enum types to make them conform to the _BridgedNSError
protocol explicitly.
Now that we have API notes, use them to make these enums into error
enums with the appropriate domain, so that the Clang importer will
synthesize the _BridgedNSError conformances. Then, remove all of the
explicit conformances---and with them, the overlays for 12 frameworks.
There is a small fix to more eagerly consider these conformances as
"used" if an expression is formed with the error enum as a value
type. This better ensures that the conformances will be available at
runtime when needed.
This cleanup is needed to implement SE-0112 (NSError bridging),
although it is useful by itself.
Previously getInterfaceType() would punt to getType() if no
interface type was set. This patch changes getInterfaceType()
to assert if no interface type is set, and updates various
places to set the interface type explicitly.
This brings us a step closer to removing PolymorphicFunctionType.
This flag tracks whether we have a special kind of imported class
that has limitations in what you can do with it. Currently it's
used for two things: CF classes, and the magic "Protocol" class used
to represent Objective-C protocol metadata. I'm planning to add a
third to handle classes with the recently-added objc_runtime_visible
attribute, which describes an Objective-C class whose runtime symbols
are hidden (forcibly preventing categories and subclassing). This is
used for some of the types in Dispatch, which has exposed some of the
classes that were considered implementation details on past OSs.
I'm splitting the flag into an enum rather than just marking the
Dispatch classes with the existing flag because we still need to
be able to /cast/ to the Dispatch types (which you can't do with CF
types today) and because they deserve better than to be lumped in
with CF for diagnostic purposes.
Groundwork for rdar://problem/26850367, which is that Swift will
happily let you extend the new Dispatch classes but then fails to find
the symbols at link-time.
Code completion had the ability to use declarations to provide better
code completion results for postfix completions, e.g., calls to
functions/methods, but it wasn't trying to get these declarations from
anywhere. Now, get these declarations from the solution to the
constraint system.
The impetus for this is to use default-argument information from the
declaration rather than the type, but plumbing this information
through also means that we get proper "rethrows" annotations, covered
by <rdar://problem/21010193>, and more specific completions in a
number of other places.
Fixes <rdar://problem/21010193>.
PointerEmbeddedInt is provided by stock LLVM and serves the same purpose. This
updates the coersion function to use that rather than the swift specific Fixnum.
Furthermore, this type has been removed in the future in favour of the
PointerEmbeddedInt type, which makes this change something which will be needed
when rebasing to a newer LLVM release.
If a behavior has storage that can be initialized out-of-line, generate code in SILGen that uses stores to mark_uninitialized_behavior for eventual analysis by DI.
This is incomplete, particularly, it's missing code generation of glue thunks for accessors that require reabstraction, but I wanted to make sure the progress here didn't bitrot.
There was a weird corner case with nested generic functions that
would fail in the SIL verifier with some nonsense about archetypes
out of context.
Fix this the "right" way, by re-working Sema function declaration
validation to assign generic signatures in a more principled way.
Previously, nested functions did not get an interface type unless
they themselves had generic parameters.
This was inconsistent with methods nested inside generic types,
which did get an interface type even if they themselves did not
have a generic parameter list.
There's some spill-over in SILGen from this change. Mostly it
makes things more consistent and fixes some corner cases.
Rather than relying on the embedding of default argument information
into tuple types (which is gross), make sure that the various clients
(type checker, type checker diagnostics, constraint application) can
dig out the callee declaration and retrieve that information from
there.
When resolving a particular locator for a ".foo" expression that
references a static/class function, make sure we pass through the
proper locator. Otherwise, when that ".foo" is somehow generic, we
won't be able to find the opened type and, therefore, will crash when
trying to form the substitution.
While I'm here, simplify the "default arguments owner" computation
logic to simply retrieve the callee declaration, which is useful for
more than just default arguments.
We already have detailed knowledge of Optional's layout in SILGen, so these intrinsics were almost unused. They were only used in a few obscure places by some optional-to-bool conversions, used by 'is [A]' collection tests and the codegen for 'lazy' properties. Change these over to generate an EnumIsCaseExpr that we can directly lower to a 'select_enum' instruction in SILGen, leading to better codegen and obviating the need for these intrinsic functions.
Per the discussion in SR-1612, we don’t have a robust mechanism for
checking this and should warn about it.
Signed-off-by: Robert Widmann <devteam.codafi@gmail.com>
Whenever we have a call, retrieve the argument labels from the
argument structurally and associate them with the callee. We were
previously doing this as a separate AST walk (which was unnecessary),
so fold that into constraint generation for a CallExpr. We were also
allowing weird ASTs to effectively disable this information: tighten
that up and require that CallExprs always have a ParenExpr, TupleExpr,
or (as a temporary hack) a TypeExpr whose representation is a
TupleTypeRepr as their argument prior to type checking. This gives us
a more sane AST to work with, and guarantees that we aren't losing
label information.
From the user perspective, this should be NFC, because it's mostly AST
cleanup and staging.
The following diagnostics have been added:
1. implicit capture of inout arguments by closure literals that may escape (
not mark by @noescape) is now invalid. This also includes implicit capture
of `self`.
2. nested functions with inout captures cannot be used as arguments not marked
@noescape.
3. nested function with inout captures cannot be a return value.
This change eliminates the need for the shadowing mechanism created for inouts.
foo().getCFString() as String
This cast creates an implicit call expression where the function for the
call is an implicit declref. Instead of choosing "getCFString" as the
location of the declref, we should choose "foo", since otherwise the
overall source range for the call and the coercion will be missing
foo().
Unfortunately there is no good way to test source ranges right now, but
this fixes e.g. the range in the following diagnostic:
struct S {
func getCFString() -> CFString { fatalError("") }
}
_ = S().getCFString() as String + 1
~~~~~~~~~~~~~~~~~~~~~~~ ^ ~ // before
~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~ // now
rdar://problem/26301228
Implement the Objective-C #keyPath expression, which maps a sequence
of @objc property accesses to a key-path suitable for use with
Cocoa[Touch]. The implementation handles @objc properties of types
that are either @objc or can be bridged to Objective-C, including the
collections that work with key-value coding (Array/NSArray,
Dictionary/NSDictionary, Set/NSSet).
Still to come: code completion support and Fix-Its to migrate string
literal keypaths to #keyPath.
Implements the bulk of SR-1237 / rdar://problem/25710611.
semantically unambiguous.
We didn't actually intend to change how programmers normally
constructed these types, but the change to the object literal
syntax accidentally caused these initializers to have very
natural-seeming signatures. These initializers also created
possible ambiguities with the actual initializers. Renaming
them to refer to their function as literal initializers is the
right thing to do.
Unfortunately, this provided to be somewhat annoying, as the
code was written to assume that the argument tuple following
e.g. #colorLiteral could be directly passed to the initializer.
We solve this by hacking on both ends of the constraint system:
during generation we form a conversion constraint to the
original, idealized parameter type, and during application we
rewrite the argument tuple type to use the actual labels.
This nicely limits the additional complexity to just the
parts dealing with object literals.
Note that we can't just implicitly rewrite the tuple expression
because that would break invariants tying the labels to physical
source ranges. We also don't want to just change the literal
syntax again and break compatibility with existing uses.
rdar://26148507
Implements the core functionality of SE-0064 / SR-1239, which
introduces support for accessing the Objective-C selectors of the
getter and setter of an @objc property via #selector(getter:
propertyName) and #selector(setter: propertyName).
Introduce a bunch of QoI around mistakes using #selector to refer to a
property without the "getter:" or "setter:", using Fix-Its to help the
user get it right. There is more to do in this area, still, but we
have an end-to-end feature working.
Much of the implementation and nearly all of the test cases are from
Alex Hoppen (@ahoppen). I've done a bit of refactoring, simplified the
AST representation, and replaced Alex's custom
expression-to-declaration logic with an extension to the constraint
solver. The last bit might be short-lived, based on swift-evolution
PR280, which narrows the syntax of #selector considerably.
