Bash-4.4 distribution sources and documentation

[thirdparty/bash.git] / tests / nameref17.sub

diff --git a/tests/nameref17.sub b/tests/nameref17.sub
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+# test behavior of readonly namerefs and namerefs referencing readonly variables
+
+# readonly nameref variable referencing read-write global variable
+
+bar=one
+declare -rn foo0=bar
+unset foo0     # unsets bar
+declare -p bar
+unset -n foo0  # cannot unset
+declare -p foo0
+
+declare +r foo0                # modifies bar
+declare -p foo0 bar
+declare +r -n foo0     # error
+declare +n foo0                # error
+unset bar
+
+# readonly nameref variable without a value
+typeset -n foo1
+typeset -r foo1
+
+typeset -p foo1
+
+typeset foo1=bar               # error
+typeset +r foo1                        # no-op, follows nameref chain to nothing
+typeset -p foo1
+
+# nameref pointing to read-only global variable
+foo2=bar
+typeset -n foo2
+typeset -r foo2                        # changes bar
+
+typeset -p foo2 bar
+
+foo2=bar                       # error?
+typeset +r foo2                        # attempts to change bar, error
+typeset -p foo2 bar            # nameref unchanged
+
+# read-only nameref pointing to read-only global variable
+bar3=three
+declare -rn foo3=bar3
+unset foo3     # unsets bar3
+
+bar3=three
+declare -p bar3
+unset -n foo3  # cannot unset
+
+readonly bar3
+declare +r foo3                # error attempting to reference bar3
+declare -p foo3 bar3
+declare +r -n foo3     # error
+
+# readonly nameref pointing to read-write local -- can we remove nameref attr?
+func()
+{
+       typeset bar4=four
+
+       # readonly nameref
+       typeset -n -r foo4=bar4
+
+       typeset -p foo4 bar4
+
+       typeset +n foo4
+
+       typeset -p foo4
+}
+func
+unset -f func
+
+# readonly nameref pointing to read-write global -- can we remove nameref attr?
+bar4=four
+foo4=bar4
+# readonly nameref
+typeset -n foo4
+typeset -r -n foo4
+
+typeset -p foo4 bar4
+
+typeset +n foo4
+typeset -p foo4
+
+bar4=four
+: ${foo4=bar4}
+
+typeset -p foo4 bar4
+
+# readonly local nameref without a value -- can we remove nameref attribute?
+func()
+{
+       declare -r -n foo5
+       declare -p foo5
+       declare +n foo5
+       declare -p foo5
+}
+func
+unset -f func
+
+# readonly global nameref without a value -- can we remove nameref attribute?
+declare -n foo5
+declare -r -n foo5
+declare -p foo5
+declare +n foo5
+declare -p foo5