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#!/bin/bash4
test_char ()
{
case "$1" in
[[:print:]] ) echo "$1 is a printable character.";;& # |
# The ;;& terminator continues to the next pattern test. |
[[:alnum:]] ) echo "$1 is an alpha/numeric character.";;& # v
[[:alpha:]] ) echo "$1 is an alphabetic character.";;& # v
[[:lower:]] ) echo "$1 is a lowercase alphabetic character.";;&
[[:digit:]] ) echo "$1 is an numeric character.";& # |
# The ;& terminator executes the next statement ... # |
%%%@@@@@ ) echo "********************************";; # v
# ^^^^^^^^ ... even with a dummy pattern.
esac
}
echo
test_char 3
# 3 is a printable character.
# 3 is an alpha/numeric character.
# 3 is an numeric character.
# ********************************
echo
test_char m
# m is a printable character.
# m is an alpha/numeric character.
# m is an alphabetic character.
# m is a lowercase alphabetic character.
echo
test_char /
# / is a printable character.
echo
# The ;;& terminator can save complex if/then conditions.
# The ;& is somewhat less useful.
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