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[5.9][Macros] Test case for opt-out from automatic attrs propagation #66419

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[5.9][Macros] Test case for opt-out from automatic attrs propagation #66419

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22 changes: 22 additions & 0 deletions test/Macros/macro_attribute_expansiondecl.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -77,11 +77,24 @@ public struct FuncFromClosureMacro: DeclarationMacro {
}
}

public struct FuncFooBarNoAttrsMacro: DeclarationMacro {
public static var propagateFreestandingMacroAttributes: Bool { false }
public static var propagateFreestandingMacroModifiers: Bool { false }

public static func expansion(
of node: some FreestandingMacroExpansionSyntax,
in context: some MacroExpansionContext
) throws -> [DeclSyntax] {
return ["func foo() -> Int { 1 }", "func bar() -> String { \"bar\" }"]
}
}

//--- test.swift

@freestanding(declaration, names: named(globalFunc), named(globalVar)) macro globalDecls() = #externalMacro(module: "MacroDefinition", type: "GlobalFuncAndVarMacro")
@freestanding(declaration, names: named(memberFunc), named(memberVar)) macro memberDecls() = #externalMacro(module: "MacroDefinition", type: "MemberFuncAndVarMacro")
@freestanding(declaration, names: named(localFunc), named(localVar)) macro localDecls() = #externalMacro(module: "MacroDefinition", type: "LocalFuncAndVarMacro")
@freestanding(declaration, names: named(foo), named(bar)) macro funcFooBarNoAttrs() = #externalMacro(module: "MacroDefinition", type: "FuncFooBarNoAttrsMacro")

@available(SwiftStdlib 9999, *)
#globalDecls
Expand Down Expand Up @@ -157,3 +170,12 @@ struct S2 { // expected-note 4 {{add @available attribute to enclosing struct}}
}
}
}

struct S3 {
@discardableResult private #funcFooBarNoAttrs()
}

func testS3(value: S3) {
value.foo() // expected-warning {{result of call to 'foo()' is unused}}
value.bar() // expected-warning {{result of call to 'bar()' is unused}}
}