Zsh: Use die() in functions

.config/zsh/functions/btrfs-snapshot-compare

@@ -3,10 +3,9 @@
 
 setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
 
-if [[ ${ARGC} -lt 2 ]]; then
-    print -u 2 "Usage: ${0} <old> <new>"
-    return 1
-fi
+autoload -U die
+
+[[ ${ARGC} -lt 2 ]] && die 1 "Usage: ${0} <old> <new>"
 local old="${1}"
 local new="${2}"
 

.config/zsh/functions/export-emacs

@@ -3,10 +3,9 @@
 
 setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
 
-if [[ ARGC -eq 0 ]]; then
-    print -u 2 "Usage: ${0} <variable> …"
-    return 1
-fi
+autoload -U die
+
+[[ ARGC -eq 0 ]] && die 1 "Usage: ${0} <variable> …"
 
 # Fail if we can't communicate with the daemon
 [[ "$(emacsclient -e t)" == 't' ]] || return 1

.config/zsh/functions/gdb_get_backtrace

@@ -3,10 +3,9 @@
 
 setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
 
-if [[ ${ARGC} -ne 2 ]]; then
-    print -u 2 "Usage: ${0} <executable> <core dump>"
-    return 1
-fi
+autoload -U die
+
+[[ ${ARGC} -ne 2 ]] && die 1 "Usage: ${0} <executable> <core dump>"
 local exe="${1}"
 local core="${2}"
 

.config/zsh/functions/mksmol

@@ -4,10 +4,9 @@
 
 setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
 
-if [[ ${ARGC} -ne 1 ]]; then
-    print -u 2 "Usage: ${0} <directory>"
-    return 1
-fi
+autoload -U die
+
+[[ ${ARGC} -ne 1 ]] && die 1 "Usage: ${0} <directory>"
 local dir="${1}"
 
 for file in "${dir}"/*; do

.config/zsh/functions/putwww

@@ -3,10 +3,9 @@
 
 setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
 
-if [[ ${ARGC} -eq 0 ]]; then
-    print -u 2 "Usage: ${0} <file> …"
-    return 1
-fi
+autoload -U die
+
+[[ ${ARGC} -eq 0 ]] && die 1 "Usage: ${0} <file> …"
 
 local -a putcmds
 for file in "${@}"; do