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markom |
#
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# Tests for "upvar" across interpreter boundaries
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# ----------------------------------------------------------------------
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# AUTHOR: Michael J. McLennan
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# Bell Labs Innovations for Lucent Technologies
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# mmclennan@lucent.com
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# http://www.tcltk.com/itcl
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#
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# RCS: $Id: upvar.test,v 1.1.1.1 2002-01-16 10:24:47 markom Exp $
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# ----------------------------------------------------------------------
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# Copyright (c) 1993-1998 Lucent Technologies, Inc.
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# ======================================================================
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# See the file "license.terms" for information on usage and
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# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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# ----------------------------------------------------------------------
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# DEFINE SOME USEFUL ROUTINES
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# ----------------------------------------------------------------------
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proc upvarTest_show_var {var val} {
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return "$var>>$val"
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}
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proc upvarTest_upvar_in_procs {} {
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set upvarTest_var_local "value in main interp"
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foo do {
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upvar upvarTest_var_local var
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set var
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}
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}
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# ----------------------------------------------------------------------
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# CREATE SOME OBJECTS
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# ----------------------------------------------------------------------
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Foo foo
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Baz baz
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# ----------------------------------------------------------------------
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# UPVAR TESTS
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# ----------------------------------------------------------------------
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test {"::" sends command to global interp but preserves
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local variables. This ensures that when control
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shifts to the global scope for Extended Tcl commands,
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Expect commands, etc., local variables will be
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recognized.} {
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foo do {
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set localvar "special"
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::eval {upvarTest_show_var localvar $localvar}
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}
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} {
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$result == "Foo says 'localvar>>special'"
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}
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test {"upvar" can cross interp boundaries to access local variables} {
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upvarTest_upvar_in_procs
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} {
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$result == "Foo says 'value in main interp'"
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}
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test {"upvar" can cross interp boundaries to access global variables} {
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set upvarTest_var_global "value in main interp"
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foo do {
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upvar upvarTest_var_global var
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set var
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}
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} {
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$result == "Foo says 'value in main interp'"
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}
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test {"upvar" can handle multiple call frames on the stack} {
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set upvarTest_var_global "new value"
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foo do {
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foo do {
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upvar #0 upvarTest_var_global var
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set var
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}
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}
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} {
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$result == "Foo says 'Foo says 'new value''"
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}
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test {"upvar" can cross class interp boundaries} {
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baz do {
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set localvar "value in Baz"
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foo do {
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upvar localvar var
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set var
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}
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}
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} {
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$result == "Baz says 'Foo says 'value in Baz''"
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}
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test {"upvar" can cross class interp boundaries back to main interp} {
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set upvarTest_var_global "global value"
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baz do {
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foo do {
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upvar 2 upvarTest_var_global var
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set var
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}
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}
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} {
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$result == "Baz says 'Foo says 'global value''"
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}
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# ----------------------------------------------------------------------
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# CLEAN UP
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# ----------------------------------------------------------------------
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foo delete
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baz delete
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