This commit defines the ‘Any’ keyword, implements parsing for composing
types with an infix ‘&’, and provides a fixit to convert ‘protocol<>’
- Updated tests & stdlib for new composition syntax
- Provide errors when compositions used in inheritance.
Any is treated as a contextual keyword. The name ‘Any’
is used emit the empty composition type. We have to
stop user declaring top level types spelled ‘Any’ too.
'let' properties are settable inside certain initializers, but the
logic was wrong -- in most cases we would fall through and return
true from ::isSettable().
This came up when deserialization (correctly) didn't set the setter
accessibility on a 'let' property, and a read of that property from
a constructor in another struct incorrectly decided the property
was settable, causing a crash.
Fixes <rdar://problem/21559246>.
Swift SVN r30484
The rule changes are as follows:
* All functions (introduced with the 'func' keyword) have argument
labels for arguments beyond the first, by default. Methods are no
longer special in this regard.
* The presence of a default argument no longer implies an argument
label.
The actual changes to the parser and printer are fairly simple; the
rest of the noise is updating the standard library, overlays, tests,
etc.
With the standard library, this change is intended to be API neutral:
I've added/removed #'s and _'s as appropriate to keep the user
interface the same. If we want to separately consider using argument
labels for more free functions now that the defaults in the language
have shifted, we can tackle that separately.
Fixes rdar://problem/17218256.
Swift SVN r27704
In most cases this means adding @public to things that get serialized;
in a few cases it means using a modern public stdlib API instead of
a legacy thing I was trying to keep @internal.
Swift SVN r19350
Unlike Clang, Swift's DeclContexts are not all Decls. However, I believe
each DeclContext that is /serialized/ will be either a decl, a
TranslationUnit, or a FuncExpr for a function with an actual declaration.
This might turn out to be wrong if (a) SIL needs proper DeclContexts for
variables in function bodies, or (b) we need to serialize anonymous
closure default arguments.
Along with an extension of the ConstructorDecl placeholder code, this allows
us to round-trip empty structs.
Swift SVN r5532
