Fix default value check for the add method

bashopts.sh

@@ -271,13 +271,13 @@ bashopts_declare() {
     if ! [[ -v options[check] ]]; then
         options[check]="bashopts_check_${options[type]}"
     fi
-    # Check the default value format
-    options[default]="$(${options[check]} "${options[default]}")" || exit 1
     # format the option method
     case "${options[method]}" in
         ''|s|set)
             # default: simple value - override
             options[method]="set"
+            # Check the default value format
+            options[default]="$(${options[check]} "${options[default]}")" || exit 1
             ;;
         a|add)
             # array value - add
@@ -401,15 +401,16 @@ bashopts_diplay_help() {
             # display additional information the each properties
             # discarding special options like --help
             if [[ -v bashopts_optprop_expression[$op] ]]; then
-                dval="\"${bashopts_optprop_expression[$op]//\"/\\\"}\""
-            fi
-            if [ "${bashopts_optprop_type[$op]}" == "string" ]; then
-                dval=${dval:-"\"${bashopts_optprop_default[$op]//\"/\\\"}\""}
+                elts="- [\$$op] (type:${bashopts_optprop_type[$op]}, default:\"${bashopts_optprop_expression[$op]//\"/\\\"}\")"
+            elif [[ -v bashopts_optprop_default[$op] ]]; then
+                if [ "${bashopts_optprop_type[$op]}" == "string" ]; then
+                    elts="- [\$$op] (type:${bashopts_optprop_type[$op]}, default:\"${bashopts_optprop_default[$op]//\"/\\\"}\")"
+                else
+                    elts="- [\$$op] (type:${bashopts_optprop_type[$op]}, default:${bashopts_optprop_default[$op]})"
+                fi
             else
-                dval=${dval:-${bashopts_optprop_default[$op]}}
+                elts="- [\$$op] (type:${bashopts_optprop_type[$op]})"
             fi
-            # add type and default value info
-            elts="- [\$$op] (type:${bashopts_optprop_type[$op]}, default:$dval)"
         fi
         # display arguments, value if available, description, and additional info if available
         printf "    %-${optargs_max_len}s        %s\n" "${optargs[$op]}" "${bashopts_optprop_description[$op]} $elts"

test.sh

@@ -339,6 +339,15 @@ _test_case_22() {
     bashopts_process_option -n value -k is_eq_to_null -r
 }
 
+_test_case_23() {
+    bashopts_setup -n "$0" -d "Test case $0"
+
+    bashopts_declare -n value -l value -m add -d "A str value" -t string -k is_eq_to_null
+
+    bashopts_parse_args
+    bashopts_process_opts
+}
+
 _test() {
     bashopts_setup -n "$0" -d "Test case $0"