2 # Tests for "upvar" across interpreter boundaries
3 # ----------------------------------------------------------------------
4 # AUTHOR: Michael J. McLennan
5 # Bell Labs Innovations for Lucent Technologies
7 # http://www.tcltk.com/itcl
10 # ----------------------------------------------------------------------
11 # Copyright (c) 1993-1998 Lucent Technologies, Inc.
12 # ======================================================================
13 # See the file "license.terms" for information on usage and
14 # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
16 # ----------------------------------------------------------------------
17 # DEFINE SOME USEFUL ROUTINES
18 # ----------------------------------------------------------------------
19 proc upvarTest_show_var {var val} {
23 proc upvarTest_upvar_in_procs {} {
24 set upvarTest_var_local "value in main interp"
26 upvar upvarTest_var_local var
31 # ----------------------------------------------------------------------
33 # ----------------------------------------------------------------------
37 # ----------------------------------------------------------------------
39 # ----------------------------------------------------------------------
40 test {"::" sends command to global interp but preserves
41 local variables. This ensures that when control
42 shifts to the global scope for Extended Tcl commands,
43 Expect commands, etc., local variables will be
46 set localvar "special"
47 ::eval {upvarTest_show_var localvar $localvar}
50 $result == "Foo says 'localvar>>special'"
54 test {"upvar" can cross interp boundaries to access local variables} {
55 upvarTest_upvar_in_procs
57 $result == "Foo says 'value in main interp'"
60 test {"upvar" can cross interp boundaries to access global variables} {
61 set upvarTest_var_global "value in main interp"
63 upvar upvarTest_var_global var
67 $result == "Foo says 'value in main interp'"
70 test {"upvar" can handle multiple call frames on the stack} {
71 set upvarTest_var_global "new value"
74 upvar #0 upvarTest_var_global var
79 $result == "Foo says 'Foo says 'new value''"
82 test {"upvar" can cross class interp boundaries} {
84 set localvar "value in Baz"
91 $result == "Baz says 'Foo says 'value in Baz''"
94 test {"upvar" can cross class interp boundaries back to main interp} {
95 set upvarTest_var_global "global value"
98 upvar 2 upvarTest_var_global var
103 $result == "Baz says 'Foo says 'global value''"
106 # ----------------------------------------------------------------------
108 # ----------------------------------------------------------------------