constant namespace (module?)

Is there a way to limit the namespaces for constants similar to modules 
do for Functions?

The following doesn't work:

-- Procedure "testc.ipf"

#pragma TextEncoding = "UTF-8"
#pragma rtGlobals=3

#pragma moduleName=xxx

Static Constant ktest = 42

-- Procedure

#pragma TextEncoding = "UTF-8"
#pragma rtGlobals=3

Function doit()
        Variable x
        x = xxx#ktest
        print "x is", x
End

The callers of my functions needs access to several constants
(the same and/or different constants for each function).
These functions include both Igor procedures/functions and XOP/functions.

I'm worried about namespace collisions on the constant names.

PS: What about Structures too?  This seems less of a problem to me since
    I can use a very long name for the structure as the structure name 
    will appear less often (and the STRUCT variable is local).

You can make constants static (local to a file).

Accessing the constant from outside that file using moduleName#constantName isn't supported (yet), but you can use a static function that returns the constant and call that static function using the module name.

-- Procedure "testc.ipf"

#pragma TextEncoding = "UTF-8"
#pragma rtGlobals=3

#pragma moduleName=xxx

Static Constant ktest = 42

Static Function Get_ktest()
        return ktest
End

-- Procedure

#pragma TextEncoding = "UTF-8"
#pragma rtGlobals=3

Function doit()
        Variable x
        x = xxx#Get_ktest()
        print "x is", x
End