# Tests auto-upref with the "&name" syntax

source [file dirname [info script]]/testing.tcl

needs constraint jim

proc a1 {&b c} {
	append b b
	append c c
}

proc a2 {&b {dummy 3} &c} {
	append b b
	append c c
}

proc a3 {&b(c)} {
	append b(c) b_c
}

# This is treated as a normal var "&b"
proc a4 {{&b x}} {
	append &b B
}

set B 1
set C 1

test procref-1.1 {Basic test} {
	a1 B $C
	set B
} {1b}

test procref-1.2 {Basic test} {
	a1 B $C
	set B
} {1bb}

test procref-1.3 {Unset var} -body {
	a1 unsetB $C
} -returnCodes error -result {can't read "unsetB": no such variable}

test procref-1.4 {Left and right args are refs} {
	a2 B C
	list $B $C
} {1bbb 1c}

test procref-1.5 {Invalid arg} -body {
	a3 B
} -returnCodes error -result {bad variable name "b(c)": upvar won't create a scalar variable that looks like an array element}

test procref-1.6 {Default arg as ref} {
	a4
} xB

testreport