#!/bin/bash
## -----------------------------------------------------------------------
## -----------------------------------------------------------------------

## -----------------------------------------------------------------------
## Intent: Detect if the --{labels,required}-is-empty switch is valid
## -----------------------------------------------------------------------
function is_switch_valid__is_empty()
{
    local raw="$1"; shift # --{foo}-is-empty

    declare -a valid=()
    valid+=('label')
    valid+=('resolved')

    # --required-is-empty       => required
    local val="$raw"
    val="${val:2}"               # remove prefix --
    val="${val%-is-empty}"       # remove suffix token-name

    if [[ " ${valid[@]} " =~ " ${val} " ]]; then
        is_empty+=("$val")
    else
        error "Detected invalid --empty switch [$arg]"
    fi
    
    return
}

: # ($?=0) for source $include

# [EOF]