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AST: Introduce a Swift runtime availability domain.

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Add support for the `Swift` availability domain, which represents availability
with respect to the Swift runtime. Use of this domain is restricted by the
experimental feature `SwiftRuntimeAvailability`.
This commit is contained in:
Allan Shortlidge
2025-10-07 22:38:41 -07:00
parent 2d8465b043
commit 1a86cd9c26
19 changed files with 213 additions and 48 deletions
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34
test/Availability/availability_swift_runtime.swift
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@@ -1,16 +1,30 @@
// RUN: %target-typecheck-verify-swift -parse-as-library -enable-experimental-feature SwiftRuntimeAvailability
// RUN: %target-typecheck-verify-swift -parse-as-library -enable-experimental-feature SwiftRuntimeAvailability -min-swift-runtime-version 5.5
// REQUIRES: swift_feature_SwiftRuntimeAvailability
@available(swift 99) // expected-warning {{'swift' has been renamed to 'SwiftLanguageMode'}}{{12-17=SwiftLanguageMode}}
func availableInSwift99() { }
// expected-note@-1 {{'availableInSwift99()' was introduced in Swift 99}}
@available(Swift 5.0, *)
func availableInSwift5_0Runtime() { }
@available(SwiftLanguageMode 99)
func availableInSwift99LanguageMode() { }
// expected-note@-1 {{'availableInSwift99LanguageMode()' was introduced in Swift 99}}
@available(Swift 5.5, *)
func availableInSwift5_5Runtime() { }
func testUses() {
availableInSwift99() // expected-error {{'availableInSwift99()' is unavailable in Swift}}
availableInSwift99LanguageMode() // expected-error {{'availableInSwift99LanguageMode()' is unavailable in Swift}}
@available(Swift 6.0, *)
func availableInSwift6_0Runtime() { }
func alwaysAvailable() {
// expected-note@-1 {{add '@available' attribute to enclosing global function}}{{1-1=@available(Swift 6.0)\n}}
availableInSwift5_0Runtime()
availableInSwift5_5Runtime()
availableInSwift6_0Runtime() // expected-error {{'availableInSwift6_0Runtime()' is only available in Swift 6.0 or newer}}
// expected-note@-1 {{add 'if #available' version check}}{{3-31=if #available(Swift 6.0) {\n availableInSwift6_0Runtime()\n \} else {\n // Fallback on earlier versions\n \}}}
if #available(Swift 6.0, *) {
availableInSwift6_0Runtime()
}
}
@available(Swift 6.0, *)
func availableSwift6() {
availableInSwift6_0Runtime()
}