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10 lines
381 B
Swift
10 lines
381 B
Swift
// RUN: %target-swift-frontend -emit-silgen %s -module-name test -swift-version 5 -enable-experimental-concurrency | %FileCheck %s
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// REQUIRES: concurrency
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// Declarations don't mangle global actor types.
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// CHECK: @$s4test10returnsOptyxycSgAClF
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func returnsOpt<R>(_ fn: (@MainActor () -> R)?) -> (() -> R)? {
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typealias Fn = (() -> R)?
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return unsafeBitCast(fn, to: Fn.self)
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}
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