# Commands covered: upvar
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands. Sourcing this file into Tcl runs the tests and
# generates output for errors. No output means no errors were found.
#
# Copyright (c) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: upvar.test,v 1.2 2001/09/14 01:43:51 zlaski Exp $
if {[string compare test [info procs test]] == 1} then {source defs}
test upvar-1.1 {reading variables with upvar} {
proc p1 {a b} {set c 22; set d 33; p2}
proc p2 {} {upvar a x1 b x2 c x3 d x4; set a abc; list $x1 $x2 $x3 $x4 $a}
p1 foo bar
} {foo bar 22 33 abc}
test upvar-1.2 {reading variables with upvar} {
proc p1 {a b} {set c 22; set d 33; p2}
proc p2 {} {p3}
proc p3 {} {upvar 2 a x1 b x2 c x3 d x4; set a abc; list $x1 $x2 $x3 $x4 $a}
p1 foo bar
} {foo bar 22 33 abc}
test upvar-1.3 {reading variables with upvar} {
proc p1 {a b} {set c 22; set d 33; p2}
proc p2 {} {p3}
proc p3 {} {
upvar #1 a x1 b x2 c x3 d x4
set a abc
list $x1 $x2 $x3 $x4 $a
}
p1 foo bar
} {foo bar 22 33 abc}
test upvar-1.4 {reading variables with upvar} {
set x1 44
set x2 55
proc p1 {} {p2}
proc p2 {} {
upvar 2 x1 x1 x2 a
upvar #0 x1 b
set c $b
incr b 3
list $x1 $a $b
}
p1
} {47 55 47}
test upvar-1.5 {reading array elements with upvar} {
proc p1 {} {set a(0) zeroth; set a(1) first; p2}
proc p2 {} {upvar a(0) x; set x}
p1
} {zeroth}
test upvar-2.1 {writing variables with upvar} {
proc p1 {a b} {set c 22; set d 33; p2; list $a $b $c $d}
proc p2 {} {
upvar a x1 b x2 c x3 d x4
set x1 14
set x4 88
}
p1 foo bar
} {14 bar 22 88}
test upvar-2.2 {writing variables with upvar} {
set x1 44
set x2 55
proc p1 {x1 x2} {
upvar #0 x1 a
upvar x2 b
set a $x1
set b $x2
}
p1 newbits morebits
list $x1 $x2
} {newbits morebits}
test upvar-2.3 {writing variables with upvar} {
catch {unset x1}
catch {unset x2}
proc p1 {x1 x2} {
upvar #0 x1 a
upvar x2 b
set a $x1
set b $x2
}
p1 newbits morebits
list [catch {set x1} msg] $msg [catch {set x2} msg] $msg
} {0 newbits 0 morebits}
test upvar-2.4 {writing array elements with upvar} {
proc p1 {} {set a(0) zeroth; set a(1) first; list [p2] $a(0)}
proc p2 {} {upvar a(0) x; set x xyzzy}
p1
} {xyzzy xyzzy}
test upvar-3.1 {unsetting variables with upvar} {
proc p1 {a b} {set c 22; set d 33; p2; lsort [info vars]}
proc p2 {} {
upvar 1 a x1 d x2
unset x1 x2
}
p1 foo bar
} {b c}
test upvar-3.2 {unsetting variables with upvar} {
proc p1 {a b} {set c 22; set d 33; p2; lsort [info vars]}
proc p2 {} {
upvar 1 a x1 d x2
unset x1 x2
set x2 28
}
p1 foo bar
} {b c d}
test upvar-3.3 {unsetting variables with upvar} {
set x1 44
set x2 55
proc p1 {} {p2}
proc p2 {} {
upvar 2 x1 a
upvar #0 x2 b
unset a b
}
p1
list [info exists x1] [info exists x2]
} {0 0}
test upvar-3.4 {unsetting variables with upvar} {
set x1 44
set x2 55
proc p1 {} {
upvar x1 a x2 b
unset a b
set b 118
}
p1
list [info exists x1] [catch {set x2} msg] $msg
} {0 0 118}
test upvar-3.5 {unsetting array elements with upvar} {
proc p1 {} {
set a(0) zeroth
set a(1) first
set a(2) second
p2
array names a
}
proc p2 {} {upvar a(0) x; unset x}
p1
} {1 2}
test upvar-3.6 {unsetting then resetting array elements with upvar} {
proc p1 {} {
set a(0) zeroth
set a(1) first
set a(2) second
p2
list [array names a] [catch {set a(0)} msg] $msg
}
proc p2 {} {upvar a(0) x; unset x; set x 12345}
p1
} {{0 1 2} 0 12345}
test upvar-4.1 {nested upvars} {
set x1 88
proc p1 {a b} {set c 22; set d 33; p2}
proc p2 {} {global x1; upvar c x2; p3}
proc p3 {} {
upvar x1 a x2 b
list $a $b
}
p1 14 15
} {88 22}
test upvar-4.2 {nested upvars} {
set x1 88
proc p1 {a b} {set c 22; set d 33; p2; list $a $b $c $d}
proc p2 {} {global x1; upvar c x2; p3}
proc p3 {} {
upvar x1 a x2 b
set a foo
set b bar
}
list [p1 14 15] $x1
} {{14 15 bar 33} foo}
proc tproc {args} {global x; set x [list $args [uplevel info vars]]}
test upvar-5.1 {traces involving upvars} {
proc p1 {a b} {set c 22; set d 33; trace var c rw tproc; p2}
proc p2 {} {upvar c x1; set x1 22}
set x ---
p1 foo bar
set x
} {{x1 {} w} x1}
test upvar-5.2 {traces involving upvars} {
proc p1 {a b} {set c 22; set d 33; trace var c rw tproc; p2}
proc p2 {} {upvar c x1; set x1}
set x ---
p1 foo bar
set x
} {{x1 {} r} x1}
test upvar-5.3 {traces involving upvars} {
proc p1 {a b} {set c 22; set d 33; trace var c rwu tproc; p2}
proc p2 {} {upvar c x1; unset x1}
set x ---
p1 foo bar
set x
} {{x1 {} u} x1}
test upvar-6.1 {retargeting an upvar} {
proc p1 {} {
set a(0) zeroth
set a(1) first
set a(2) second
p2
}
proc p2 {} {
upvar a x
set result {}
foreach i [array names x] {
upvar a($i) x
lappend result $x
}
lsort $result
}
p1
} {first second zeroth}
test upvar-6.2 {retargeting an upvar} {
set x 44
set y abcde
proc p1 {} {
global x
set result $x
upvar y x
lappend result $x
}
p1
} {44 abcde}
test upvar-6.3 {retargeting an upvar} {
set x 44
set y abcde
proc p1 {} {
upvar y x
lappend result $x
global x
lappend result $x
}
p1
} {abcde 44}
test upvar-7.1 {upvar to same level} {
set x 44
set y 55
catch {unset uv}
upvar #0 x uv
set uv abc
upvar 0 y uv
set uv xyzzy
list $x $y
} {abc xyzzy}
test upvar-7.2 {upvar to same level} {
set x 1234
set y 4567
proc p1 {x y} {
upvar 0 x uv
set uv $y
return "$x $y"
}
p1 44 89
} {89 89}
test upvar-7.3 {upvar to same level} {
set x 1234
set y 4567
proc p1 {x y} {
upvar #1 x uv
set uv $y
return "$x $y"
}
p1 xyz abc
} {abc abc}
test upvar-7.4 {upvar to same level: tricky problems when deleting variable table} {
proc tt {} {upvar #1 toto loc; return $loc}
list [catch tt msg] $msg
} {1 {can't read "loc": no such variable}}
test upvar-7.5 {potential memory leak when deleting variable table} {
proc leak {} {
array set foo {1 2 3 4}
upvar 0 foo(1) bar
}
leak
} {}
test upvar-8.1 {errors in upvar command} {
list [catch upvar msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-8.2 {errors in upvar command} {
list [catch {upvar 1} msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-8.3 {errors in upvar command} {
proc p1 {} {upvar a b c}
list [catch p1 msg] $msg
} {1 {wrong # args: should be "upvar ?level? otherVar localVar ?otherVar localVar ...?"}}
test upvar-8.4 {errors in upvar command} {
proc p1 {} {upvar 0 b b}
list [catch p1 msg] $msg
} {1 {can't upvar from variable to itself}}
test upvar-8.5 {errors in upvar command} {
proc p1 {} {upvar 0 a b; upvar 0 b a}
list [catch p1 msg] $msg
} {1 {can't upvar from variable to itself}}
test upvar-8.6 {errors in upvar command} {
proc p1 {} {set a 33; upvar b a}
list [catch p1 msg] $msg
} {1 {variable "a" already exists}}
test upvar-8.7 {errors in upvar command} {
proc p1 {} {trace variable a w foo; upvar b a}
list [catch p1 msg] $msg
} {1 {variable "a" has traces: can't use for upvar}}
test upvar-8.8 {create nested array with upvar} {
proc p1 {} {upvar x(a) b; set b(2) 44}
catch {unset x}
list [catch p1 msg] $msg
} {1 {can't set "b(2)": variable isn't array}}
test upvar-8.9 {upvar won't create namespace variable that refers to procedure variable} {
catch {eval namespace delete [namespace children :: test_ns_*]}
catch {rename MakeLink ""}
namespace eval ::test_ns_1 {}
proc MakeLink {a} {
namespace eval ::test_ns_1 {
upvar a a
}
unset ::test_ns_1::a
}
list [catch {MakeLink 1} msg] $msg
} {1 {bad variable name "a": upvar won't create namespace variable that refers to procedure variable}}
test upvar-8.10 {upvar will create element alias for new array element} {
catch {unset upvarArray}
array set upvarArray {}
catch {upvar 0 upvarArray(elem) upvarArrayElemAlias}
} {0}
if {[info commands testupvar] != {}} {
test upvar-9.1 {Tcl_UpVar2 procedure} {
list [catch {testupvar xyz a {} x global} msg] $msg
} {1 {bad level "xyz"}}
test upvar-9.2 {Tcl_UpVar2 procedure} {
catch {unset a}
catch {unset x}
set a 44
list [catch {testupvar #0 a 1 x global} msg] $msg
} {1 {can't access "a(1)": variable isn't array}}
test upvar-9.3 {Tcl_UpVar2 procedure} {
proc foo {} {
testupvar 1 a {} x local
set x
}
catch {unset a}
catch {unset x}
set a 44
foo
} {44}
test upvar-9.4 {Tcl_UpVar2 procedure} {
proc foo {} {
testupvar 1 a {} _up_ global
list [catch {set x} msg] $msg
}
catch {unset a}
catch {unset _up_}
set a 44
concat [foo] $_up_
} {1 {can't read "x": no such variable} 44}
test upvar-9.5 {Tcl_UpVar2 procedure} {
proc foo {} {
testupvar 1 a b x local
set x
}
catch {unset a}
catch {unset x}
set a(b) 1234
foo
} {1234}
test upvar-9.6 {Tcl_UpVar procedure} {
proc foo {} {
testupvar 1 a x local
set x
}
catch {unset a}
catch {unset x}
set a xyzzy
foo
} {xyzzy}
test upvar-9.7 {Tcl_UpVar procedure} {
proc foo {} {
testupvar #0 a(b) x local
set x
}
catch {unset a}
catch {unset x}
set a(b) 1234
foo
} {1234}
}
catch {unset a}
concat