bin/clamp: Replace ad-hoc `assert_arg()` with `assert-arg`

1 files changed, 3 insertions, 10 deletions

diff --git a/bin/clamp b/bin/clamp
index 652c978..a673f72 100755
--- a/bin/clamp
+++ b/bin/clamp
@@ -68,21 +68,14 @@ while getopts 'h' flag; do
 done
 shift $((OPTIND - 1))
 
-assert_arg() {
-	if [ -z "$1" ]; then
-		printf 'Missing %s\n\n' "$2" >&2
-		usage >&2
-		exit 2
-	fi
-}
 
 NUMBER="${1:-}"
 MIN="${2:-}"
 MAX="${3:-}"
 
-assert_arg "$NUMBER" 'NUMBER'
-assert_arg "$MIN"    'MIN'
-assert_arg "$MAX"    'MAX'
+eval "$(assert-arg "$NUMBER" 'NUMBER')"
+eval "$(assert-arg "$MIN"    'MIN')"
+eval "$(assert-arg "$MAX"    'MAX')"
 
 
 if [ "$MIN" -gt "$MAX" ]; then