[Pnet-developers] [bug #5436] compiler error: using const string in DllImport

[nobody]

=================== BUG #5436: LATEST MODIFICATIONS ==================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=5436&group_id=353

Changes by: Anonymous user        Date: Thu 10/09/2003 at 00:40

------------------ Additional Follow-up Comments ----------------------------
Please note that using XYZ.LibName (ie qualifying the class in which the const 
string is does work)



=================== BUG #5436: FULL BUG SNAPSHOT ===================


Submitted by: None                    Project: DotGNU Portable.NET          
Submitted on: Fri 09/19/2003 at 12:12
Category:  None                       Severity:  5 - Major                  
Bug Group:  None                      Resolution:  None                     
Assigned to:  None                    Status:  Open                         

Summary:  compiler error: using const string in DllImport

Original Submission:  Hello, 

I've noticed that you cannot pass a const string to DllImport for the 
libraryname.

<code>
public const string LibName="MyLib";
[DllImport(LibName)] public static extern void Foo();
[DllImport(LibName)] public static extern void Bar();
</code>

this does compile with dotNET but not with dotGNU

cscc error : 'LibName' is not declared in the current scope

The current workaround is that you must pass a literal string to each interop 
entry like this: 

<code>
[DllImport("MyLib")] public static extern void Foo();
[DllImport("MyLib")] public static extern void Bar();
</code>

Unless the compiler optimizes out the duplicates, this will be extremely 
inefficient of memory.  Also, the potential for typing/copying errors 
increases.  If the library name ever changes, you'll need a good search/replace 
function.

Cheers, 

Oscar

Follow-up Comments
*******************

-------------------------------------------------------
Date: Thu 10/09/2003 at 00:40       By: None
Please note that using XYZ.LibName (ie qualifying the class in which the const 
string is does work)


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http://savannah.gnu.org/bugs/?func=detailbug&bug_id=5436&group_id=353

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