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