IronRuby not loading DLL

Ruby IronRuby
1

I have been using IronRuby for a while now to do simple scripting
against DotNet DLLs with great success. I ran in to a problem recently
where I am asking IronRuby 1.1.1 to require a DLL but it does not appear
to be loaded. I do not get an error message but cannot instantiate any
types from the DLL. If I do “p Object.constants” it does not return any
namespaces or classes from the DLL.

When trying to do:
“mdMATCHUPOBJECTLib::mdMUIncrementalClass.new”

I get the error:
“undefined method mdMATCHUPOBJECTLib”

Where mdMUIncrementalClass is a class in the DLL and mdMATCHUPOBJECTLib
is the namespace. This works perfectly in C#/VisualStudio with the same
DLL (I am basically using the exact same code in C# and Ruby). If it
helps, this is an Interop DLL created by Visual Studio from a COM DLL.

2

I may be totally “off base,” but have you tried using the fusion viewer
to ensure that you do not have a problem with .NET loading the DLL (and
its underlying COM object).

Larry J.
||| Senior Level Development Engineer
Aspen Technology, Inc. ||| +1 281-504-3324 ||| fax: 281-584-1062 |||

3

You need to use const_get to access classes/namespaces whose names are
not compatible with Ruby naming conventions.
A module in Ruby must start with capital ASCII letter.

const_get(:mdMATCHUPOBJECTLib).const_get(:mdMUIncrementalClass).new
should work.

Tomas

4

Tomas, how would you feel about adding an optional block param to
require/load_assembly for overriding how .NET types are mapped to
constants?
That might be prove beneficial in cases such as these.

-Charles

On Fri, Mar 25, 2011 at 5:37 PM, Tomas M. <

5

What would such block usually do? Uppercase the first letter of a
lower-cased class/namespace? We could do that or some other mangling
automatically. Is there any value in customizing the mangling?

Being it automatic would help you to discover the constants since they
would appear in Module#constants.

Tomas

From: [email protected]
[mailto:[email protected]] On Behalf Of Charles
Strahan
Sent: Saturday, March 26, 2011 10:00 AM
To: [email protected]
Subject: Re: [Ironruby-core] IronRuby not loading DLL

Tomas, how would you feel about adding an optional block param to
require/load_assembly for overriding how .NET types are mapped to
constants? That might be prove beneficial in cases such as these.

-Charles

On Fri, Mar 25, 2011 at 5:37 PM, Tomas M.
<[email protected]mailto:[email protected]>
wrote:
You need to use const_get to access classes/namespaces whose names are
not compatible with Ruby naming conventions.
A module in Ruby must start with capital ASCII letter.

const_get(:mdMATCHUPOBJECTLib).const_get(:mdMUIncrementalClass).new
should work.

Tomas

6

I figured that it’s always nice to have options - especially if there
are
conflicts. Capitalizing the first letter would probably work in 99% of
cases, but I could imagine there might be case where you have an xFoo
type
and an XFoo type in the same namespace.

That’s probably being pedantic though - just capitalizing the first
letter
sounds like a pragmatic solution to me.

-Charles

On Sat, Mar 26, 2011 at 10:01 PM, Tomas M. <

7

You can always use const_get for the 1% cases. IMO, having
non-capitalized namespaces and classes is already 1% case, since such
libraries violate .NET design guidelines.

Tomas

From: [email protected]
[mailto:[email protected]] On Behalf Of Charles
Strahan
Sent: Sunday, March 27, 2011 4:19 PM
To: [email protected]
Subject: Re: [Ironruby-core] IronRuby not loading DLL

I figured that it’s always nice to have options - especially if there
are conflicts. Capitalizing the first letter would probably work in 99%
of cases, but I could imagine there might be case where you have an xFoo
type and an XFoo type in the same namespace.

That’s probably being pedantic though - just capitalizing the first
letter sounds like a pragmatic solution to me.

-Charles
On Sat, Mar 26, 2011 at 10:01 PM, Tomas M.
<[email protected]mailto:[email protected]>
wrote:
What would such block usually do? Uppercase the first letter of a
lower-cased class/namespace? We could do that or some other mangling
automatically. Is there any value in customizing the mangling?

Being it automatic would help you to discover the constants since they
would appear in Module#constants.

Tomas

From:
[email protected]mailto:[email protected]
[mailto:[email protected]mailto:[email protected]]
On Behalf Of Charles S.
Sent: Saturday, March 26, 2011 10:00 AM

To: [email protected]mailto:[email protected]
Subject: Re: [Ironruby-core] IronRuby not loading DLL

Tomas, how would you feel about adding an optional block param to
require/load_assembly for overriding how .NET types are mapped to
constants? That might be prove beneficial in cases such as these.

-Charles

On Fri, Mar 25, 2011 at 5:37 PM, Tomas M.
<[email protected]mailto:[email protected]>
wrote:
You need to use const_get to access classes/namespaces whose names are
not compatible with Ruby naming conventions.
A module in Ruby must start with capital ASCII letter.

const_get(:mdMATCHUPOBJECTLib).const_get(:mdMUIncrementalClass).new
should work.

Tomas

8

You can always use const_get for the 1% cases. IMO, having non-capitalized
namespaces and classes is already 1% case, since such libraries violate .NET
design guidelines.

That’s a valid point. I’t would be trivial to write a script to re-map
types to Ruby constants in the 1% case; my suggestion is probably not
worth
implementing in IronRuby directly.

-Charles

On Sun, Mar 27, 2011 at 8:44 PM, Tomas M. <

9

I could imagine there might be case where you have an xFoo type and an
XFoo type in the same namespace
BTW, differentiating types or public members by case isn’t CLS
compliant,
which basically means that who ever wrote that code should be expecting
some
interop issues.

Miguel A. Madero Reyes
www.miguelmadero.com (blog)
[email protected]

On Mon, Mar 28, 2011 at 7:19 AM, Charles S. <