foo()
{
	local -a myvar=()
	local -r myvar=0

	echo "${myvar[@]}"
	declare -p myvar
}

foo2()
{
	local -i myvar=0
	local -r myvar=1

	echo "${myvar}"
	declare -p myvar
}

declare -a outside=()
declare -r outside
declare -p outside

outside1=1
declare -ir outside1
declare -p outside1

tempenv=foo declare -r tempenv
echo tempenv = $tempenv

foo
foo2

tempvar1=foo declare -r tempvar1
echo ${tempvar1@A}

tempvar2=bar declare -r tempvar2=qux
echo ${tempvar2@A}

unset foo
readonly var=outside

func()
{
	local var=inside
	echo "inside: $var"
}

func
echo outside: $var

unset -f f
unset VAR1 VAR2
export VAR1=abc VAR2=abc

f()
{
	local VAR1; local VAR2
	echo local: ${VAR1-unset1} ${VAR2-unset2}
	printenv VAR1 ; printenv VAR2
}

f