Cobra Forums

Hi Chuck and gang,

Hopefully this should illustrate what I'm trying to do. I'm expecting dynamic to do something that it doesn't. I want dynamic to be able to call statics on classes so that I don't have to use InvokeMethod to do it when using dynamically loaded types. Or there is another way??

Cheers.

Code: Select all

use System.Reflection

class Test

   def method1
      print '1'

   def method2 is shared
      print '2'

class Program

   def main is shared

      # As expected.
      test1 as dynamic = Test()
      test1.method1
      test1.method2

      # As expected.
      Test.method2

      # Silly looking, but a simple version of what I really want to do below.
      test2 as dynamic = Test
      expect Cobra.Lang.UnknownMemberException # Is not finding the method on Type,
         test2.method2                   # ok, but could/should it look for
                                     # statics on Test as well??

      # Using dynamically loaded assemblies...
      mono = Assembly.load('Mono.Posix, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756')

      # ...this is what I really want to do... (minus the expect of course)
      unixFileSystemInfo as dynamic? = mono.getType('Mono.Unix.UnixFileSystemInfo')
      expect Cobra.Lang.UnknownMemberException
         # UnixFileSystemInfo.GetFileSystemEntry() is static.
         fileInfo as dynamic? = unixFileSystemInfo.getFileSystemEntry('/usr/local/bin/cobra')

      # ...to avoid doing this...
      unixFileSystemInfo2 as Type = mono.getType('Mono.Unix.UnixFileSystemInfo')
      fileInfo as dynamic? = unixFileSystemInfo2.invokeMember('GetFileSystemEntry',
                                                BindingFlags.Static | BindingFlags.InvokeMethod,
                                                nil,
                                                nil,
                                                ['/usr/local/bin/cobra'].toArray)

      # Dynamic needs to search for BindingFlags.Static or something?

PS: I've got my tabs=4 and the code block seems to not be indenting correctly. The three comments start "# Is not finding the method on" and the five parameters of invokeMember() should be vertically aligned.

PPS: I tried cobra tags and the tabs were expanded to 8 characters and the lines got chopped off. I guess I need to untabify.

I'm about to step away so some quick notes:

-- Don't worry about untabifying. I don't.

-- Lines chopped off? I haven't seen that. Maybe running long and needing horiz scrolling...

-- I hope to eventually fix the <cobra> tags to set tabs to 4 and syntax highlight, but haven't had the chance. Our software is phpBB if anyone wants to take a crack at it.

-- I was playing with dynamic binding earlier and also discovered that it is not seeing static methods, which is disappointing. Would you fill out a Trac ticket?

-- For combining enums, you can say BindingFlags(Static, InvokeMethod)

-- For arrays, you can use the list syntax prefixed by @ as in @['/foo/bar']

-- Until I get dynamic+static fixed, you could make a wrapper class to "encapsulate the ugly".

-- Dynamic should work well with objects and instance methods so once you're getting objects such as from "getFileSystemEntry" it should get easier.

Cool. Cheers!

dynamic+static is now fixed in development.