In some cases, it's useful to allow an availability macro to expand to an empty
availability specification list. Allow developers to express this using macros
that are defined to exactly the string `*`, while continuing to reject `*` in
availability macros that contain other entries.
Removes the underscored prefixes from the @_section and @_used attributes, making them public as @section and @used respectively. The SymbolLinkageMarkers experimental feature has been removed as these attributes are now part of the standard language. Implemented expression syntactic checking rules per SE-0492.
Major parts:
- Renamed @_section to @section and @_used to @used
- Removed the SymbolLinkageMarkers experimental feature
- Added parsing support for the old underscored names with deprecation warnings
- Updated all tests and examples to use the new attribute names
- Added syntactic validation for @section to align with SE-0492 (reusing the legality checker by @artemcm)
- Changed @DebugDescription macro to explicitly use a tuple type instead of type inferring it, to comply with the expression syntax rules
- Added a testcase for the various allowed and disallowed syntactic forms, `test/ConstValues/SectionSyntactic.swift`.
We would crash in some cases, or produce a slightly misleading
diagnostic about same-element requirements, which are related but
not quite the same.
In the fullness of time, we should figure out this corner of the
language. Until then, add a new diagnostic since this is really
about same-type requirements between concrete types and packs.
Fixes rdar://159790557.
Correct several behaviors of availability checking in unavailable contexts that
were inconsistent with the checking model:
- Avoid diagnosing unintroduced and obsolted declarations in contexts that are
unavailable in the same domain.
- Diagnose unavailability normally in type signature contexts.
Implements SE-0460 -- the non-underscored version of @specialized.
It allows to specify "internal" (not abi affecting) specializations.
rdar://150033316
This includes changing the feature name so that compilers with the experimental feature don’t accidentally pick up content that only works in the final version.
Resolves rdar://150065196.
This commit compares the decl inside the `@abi` attribute to the decl it’s attached to, diagnosing ABI-incompatible differences. It does not yet cover attributes, which are a large undertaking.
* [CS] Decline to handle InlineArray in shrink
Previously we would try the contextual type `(<int>, <element>)`,
which is wrong. Given we want to eliminate shrink, let's just bail.
* [Sema] Sink `ValueMatchVisitor` into `applyUnboundGenericArguments`
Make sure it's called for sugar code paths too. Also let's just always
run it since it should be a pretty cheap check.
* [Sema] Diagnose passing integer to non-integer type parameter
This was previously missed, though would have been diagnosed later
as a requirement failure.
* [Parse] Split up `canParseType`
While here, address the FIXME in `canParseTypeSimpleOrComposition`
and only check to see if we can parse a type-simple, including
`each`, `some`, and `any` for better recovery.
* Introduce type sugar for InlineArray
Parse e.g `[3 x Int]` as type sugar for InlineArray. Gated behind
an experimental feature flag for now.
Allan Shortlidge
Rintaro Ishizaki
Ramon Asuncion
Slava Pestov
bashir
Kavon Farvardin
Alexis Laferrière
Kuba Mracek
Hamish Knight
Meghana Gupta
Pavel Yaskevich
Pavel Yaskevich
Arnold Schwaighofer
Becca Royal-Gordon
Andrew Trick