log-() { log+ "-$1" "${@:2}"; }

log++() { log+ 1 "$@"; }

log--() { log- 1 "$@"; }

alias log_local=\

'declare PS4="$PS4" log_level="$log_level" verbosity="$verbosity"'

alias log+='log_local; "log+"' # don't expand next word because it's not a cmd

alias log++='log_local; "log++" ' # last space alias-expands next word

alias log--='log_local; "log--" ' # last space alias-expands next word

# no clog+ alias because next word is not a cmd

alias clog++='"log++" ' # last space alias-expands next word

alias clog--='"log--" ' # last space alias-expands next word

verbosity_min() # usage: verbosity_min {<min>|''}

# WARNING: '' is a special value that causes $verbosity to be overwritten to ''