#### caching

## shell-variable-based caching

# usage: local cache_key=...; cache_init; \

# if ! cached; then cache_save value; fi; echo_cached_value

# cache_key for function inputs: "$(declare -p "$kw_param"...) $*"

alias load_cache='declare cache_var="$(str2varname "${FUNCNAME}___$cache_key")"'

alias cached='isset "$cache_var"'

alias save_cache='set_var "$cache_var"'

alias echo_cached_value='echo "${!cache_var}"'

clear_cache() # usage: func=... clear_cache

{ : "${func:?}"; unset $(prefix="${func}___" get_prefix_vars); }

fi # load new aliases

if self_being_included; then