async_dynamic.swift

// RUN: %empty-directory(%t)
// RUN: %target-build-swift -target %target-swift-5.1-abi-triple %s -parse-as-library -module-name main -o %t/main
// RUN: %target-codesign %t/main
// RUN: %target-run %t/main | %FileCheck %s

// REQUIRES: concurrency
// REQUIRES: executable_test
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime

publicdynamicfunc number()async->Int{
return100
}

enumSomeError:Error{
case err
}

classC{
dynamicfunc a()asyncthrows->Int?{
return0
}

dynamicfunc b()asyncthrows{
guardlet data =tryawaita()else{
throwSomeError.err
}
}

}
@mainstructMain{

staticfunc main()async{
do{
tryawaitC().b()
}catch _ {assertionFailure("should not throw")}

 // CHECK: 100
letvalue=awaitnumber()
print(value)
}
}