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+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# case 1: readonly modifying local scalar variables
+o1() {
+ local i1 j1
+ readonly i1=$1
+ readonly j1="1 2 3"
+
+ echo "in o1 (readonly modifying local scalars):"
+ declare -p i1
+ declare -p j1
+}
+
+o1 "a b c"
+
+echo after o1:
+declare -p i1 j1
+
+unset i1 j1
+
+# case 2: readonly setting global scalar variables
+o2() {
+ readonly i2=$1
+ readonly j2="1 2 3"
+
+ echo "in o2 (readonly setting global scalars):"
+ declare -p i2
+ declare -p j2
+}
+
+o2 "a b c"
+echo after o2:
+declare -p i2 j2
+
+unset i2 j2
+
+# case 3: readonly modifying local variables, converting to arrays
+o3() {
+ local i3 j3
+ readonly i3=($1)
+ readonly j3=(1 2 3)
+
+ echo "in o3 (readonly modifying locals, converting to arrays):"
+ declare -p i3
+ declare -p j3
+}
+
+o3 "a b c"
+echo after o3:
+declare -p i3 j3
+
+unset i3 j3
+
+# case 4: readonly setting global array variables
+o4() {
+ readonly i4=($1)
+ readonly j4=(1 2 3)
+
+ echo "in o4 (readonly setting global array variables):"
+ declare -p i4
+ declare -p j4
+}
+
+o4 "a b c"
+echo after o4:
+declare -p i4 j4
+
+unset i4 j4