On Tue, Jan 14, 2020 at 10:27 AM 'Vinay Sajip' via golang-nuts <golang-nuts@googlegroups.com> wrote: > > I have a string value that I’d like to convert into an actual object in my > running program. The string would be read from a configuration file. For > example, the string "os:Stdin" should be processable somehow to get the > actual variable os.Stdin. Is that possible in Go? The reflect package seems > to only work on objects you already have; I’ve also had a look at the > go/importer package, but that seems to primarily deal with source-level > information and doesn’t seem to allow you to bridge from there to already > existing objects in memory. Other-language equivalents would be > Class.forName(...) in Java or Assembly.GetType(...) in C#. Can anyone supply > any useful pointers? I know about the plugin package, but AFAIK it doesn’t > work on Windows.
In general this is not possible in Go. Sorry. If you can restrict yourself to exported package-scope variables, then you can probably use the debug/pe (on Windows) package to look up the symbol name and use that value as the variable's address. Or in some cases you can keep a registry of names that you need to find. Note that by default the Go linker will discard unreferenced variables and functions, so the fact that a variable exists in the package doesn't mean it will exist in the final linked executable. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAOyqgcW7ZBw2skQ%2BFX9_6hcrOtcOhsmGq3nJh-2Xs%3DYQcfXh-w%40mail.gmail.com.
