private static void SetScriptInitializerReturnType(
CSharpCompilation compilation,
SynthesizedInteractiveInitializerMethod scriptInitializer,
ImmutableArray<ImmutableArray<FieldOrPropertyInitializer>> fieldInitializers,
DiagnosticBag diagnostics)
{
bool isAsync = scriptInitializer.IsSubmissionInitializer && fieldInitializers.Any(i => i.Any(ContainsAwaitsVisitor.ContainsAwait));
var resultType = scriptInitializer.ResultType;
TypeSymbol returnType;
if ((object)resultType == null)
{
Debug.Assert(!isAsync);
returnType = compilation.GetSpecialType(SpecialType.System_Void);
}
else if (!isAsync)
{
returnType = resultType;
}
else
{
var taskT = compilation.GetWellKnownType(WellKnownType.System_Threading_Tasks_Task_T);
var useSiteDiagnostic = taskT.GetUseSiteDiagnostic();
if (useSiteDiagnostic != null)
{
diagnostics.Add(useSiteDiagnostic, NoLocation.Singleton);
}
returnType = taskT.Construct(resultType);
}
scriptInitializer.SetReturnType(isAsync, returnType);
}
