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https://github.com/apple/swift.git
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Aviva Ruben
ce56e9ce6c
Diagnose was already supported by swift syntax, so we don't need to track it at all in C++. Adds support for propagating a file default availability via a side effect of a request. Ideally this would go away in a future compiler that doesn't mutate decls to apply inferred attributes. Future default attributes probably end up in this request, unfortunately.
78 lines
2.4 KiB
Swift
78 lines
2.4 KiB
Swift
// REQUIRES: swift_swift_parser
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// REQUIRES: swift_feature_DefaultIsolationPerFile
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// RUN: %empty-directory(%t)
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// RUN: split-file %s %t
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// Build the macro library
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// RUN: %host-build-swift -swift-version 5 -emit-library -o %t/%target-library-name(MacroDefinition) -module-name=MacroDefinition %t/macro.swift
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// Type check and verify
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// RUN: %target-swift-frontend -typecheck -verify -enable-experimental-feature DefaultIsolationPerFile -load-plugin-library %t/%target-library-name(MacroDefinition) %t/defaulted.swift %t/caller.swift
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// This test verifies two properties of `using @available(...)` file
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// defaults against peer macros:
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//
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// 1. Peer macro top-level decls DO inherit the file default.
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// 2. Macros cannot emit `using` decls themselves.
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//--- macro.swift
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import SwiftSyntax
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import SwiftSyntaxMacros
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/// Synthesizes a sibling function named "<original>_peer".
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public struct AddPeerMacro: PeerMacro {
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public static func expansion(
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of node: AttributeSyntax,
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providingPeersOf declaration: some DeclSyntaxProtocol,
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in context: some MacroExpansionContext
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) throws -> [DeclSyntax] {
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guard let named = declaration.asProtocol(NamedDeclSyntax.self) else {
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return []
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}
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return [
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"""
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public func \(raw: named.name.text)_peer() {}
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"""
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]
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}
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}
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/// Synthesizes a `using` decl as a peer (must reject).
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public struct EmitUsingMacro: PeerMacro {
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public static func expansion(
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of node: AttributeSyntax,
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providingPeersOf declaration: some DeclSyntaxProtocol,
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in context: some MacroExpansionContext
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) throws -> [DeclSyntax] {
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return [
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"""
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using @available(*, deprecated, message: "from macro")
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"""
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]
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}
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}
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//--- defaulted.swift
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using @available(*, deprecated, message: "legacy")
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@attached(peer, names: suffixed(_peer))
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macro AddPeer() = #externalMacro(module: "MacroDefinition", type: "AddPeerMacro")
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@attached(peer)
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macro EmitUsing() = #externalMacro(module: "MacroDefinition", type: "EmitUsingMacro")
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@AddPeer
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public func foo() {}
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// expected-error@@__swiftmacro_9defaulted3bar9EmitUsingfMp_.swift:1:1 {{macro expansion cannot introduce using}}
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@EmitUsing // expected-note {{in expansion of macro 'EmitUsing' on global function 'bar()' here}}
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public func bar() {}
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//--- caller.swift
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public func uses() {
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foo() // expected-warning {{'foo()' is deprecated: legacy}}
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foo_peer() // expected-warning {{'foo_peer()' is deprecated: legacy}}
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bar() // expected-warning {{'bar()' is deprecated: legacy}}
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}
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