internal static bool InAsyncMethod(Expression value)
{
INodeWithBody ancestor = value.GetAncestor <BlockExpression>();
if (ancestor == null)
{
ancestor = value.GetAncestor <Method>();
}
return(ContextAnnotations.IsAsync(ancestor));
}
public static bool TryCreate(TypeSystemServices tss, Method method, IType genericArg,
out AsyncMethodBuilderMemberCollection collection)
{
if (ContextAnnotations.IsAsync(method))
{
var returnType = (IType)method.ReturnType.Entity;
if (returnType == tss.VoidType)
{
return(TryCreateVoid(tss, out collection));
}
if (returnType == tss.TaskType)
{
return(TryCreateTask(tss, out collection));
}
if (returnType.ConstructedInfo != null &&
returnType.ConstructedInfo.GenericDefinition == tss.GenericTaskType)
{
return(TryCreateGenericTask(tss, genericArg, out collection));
}
}
throw CompilerErrorFactory.InvalidAsyncType(method.ReturnType);
}