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Ensure that macro overloading via availability works #67748

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Aug 4, 2023
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Ensure that macro overloading via availability works #67748

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36 changes: 36 additions & 0 deletions test/Macros/macro_availability_macos.swift
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// REQUIRES: swift_swift_parser, asserts
// REQUIRES: OS=macosx

// RUN: %target-typecheck-verify-swift -swift-version 5 -module-name MacrosTest -target %target-cpu-apple-macos50

@freestanding(expression)
macro overloadedOnAvailability(_: Any) -> Int = #externalMacro(module: "MacroLibrary", type: "MyOldMacro")
//expected-warning@-1{{external macro implementation type 'MacroLibrary.MyOldMacro'}}
// expected-note@-2 2{{'overloadedOnAvailability' declared here}}

@available(macOS 60, *)
@freestanding(expression)
macro overloadedOnAvailability(_: Int) -> Double = #externalMacro(module: "MacroLibrary", type: "MyNewMacro")
//expected-warning@-1{{external macro implementation type 'MacroLibrary.MyNewMacro'}}
// expected-note@-2{{'overloadedOnAvailability' declared here}}


func mutateInt(_: inout Int) { }
func mutateDouble(_: inout Double) { }

func testAvailabilityOld() {
var a = #overloadedOnAvailability(1)
mutateInt(&a)
// expected-error@-2{{external macro implementation type 'MacroLibrary.MyOldMacro'}}
}

@available(macOS 60, *)
func testAvailabilitNew(a: Any) {
var a = #overloadedOnAvailability(1)
mutateDouble(&a)
// expected-error@-2{{external macro implementation type 'MacroLibrary.MyNewMa}}

var b = #overloadedOnAvailability(a)
mutateInt(&b)
// expected-error@-2{{external macro implementation type 'MacroLibrary.MyOldMacro'}}
}