Bugs item #2837655, was opened at 2009-08-14 15:00
Message generated for change (Tracker Item Submitted) made by pwdraper
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Category: Namespace usage
Group: 4.0*
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Peter W. Draper (pwdraper)
Assigned to: Michael McLennan (mmclennan)
Summary: Namespace import fails to properly create class commands

Initial Comment:
Hi, if I import all the class commands from a namespace this causes an error
claiming that all the class commands already exists. Consider the script:

package require itcl
package require itk

namespace import itk::*

itcl::class Test {

   inherit itk::Toplevel

   constructor {args} {
      puts "Construction: $this ->  $args"
      eval itk_initialize $args
   }

   destructor {
      puts "Destruction: $this"
   }
}

Test .t -title "New window"

When I run this against itcl-ng (with tcl8.6) I get the error:

Error in startup script: cannot inherit from "itk::Toplevel" (can't create object "itk::Topl
evel": command already exists with that nameITCL: cannot create Tcl_NewObjectInstance for cl
ass "::itk::Toplevel")
    while executing
"inherit itk::Toplevel"
    (class "Test" body line 3)
    invoked from within
"itcl::class Test {

   inherit itk::Toplevel

   constructor {args} {
      puts "Construction: $this ->  $args"
      eval itk_initialize $args
   }

..."
    (file "itest.tcl" line 6)

Removing the "namespace import" line fixes the problem or moving
back to itcl 3.4.


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