add -g option to _parameters to restrict type of parameters completed (12583)

Completion/Builtins/_arrays

@@ -2,4 +2,4 @@
 
 local expl
 
-_wanted arrays expl array compadd -k "parameters[(R)*array*~*local*]"
+_wanted arrays expl array _parameters "$@" -g '*array*'

Completion/Builtins/_vars

@@ -1,8 +1,9 @@
 #compdef getopts unset vared
 
 # This will handle completion of keys of associative arrays, e.g. at
-# `vared foo[<TAB>'.  However, in this version the [ must be added
-# by hand.
+# `vared foo[<TAB>'.
+
+local ret=1
 
 if [[ $PREFIX = *\[* ]]; then
   local var=${PREFIX%%\[*}
@@ -11,7 +12,7 @@ if [[ $PREFIX = *\[* ]]; then
 
   compset -p $(( ${#var} + 1 ))
   if ! compset -S \]; then
-    addclose=(-S ']')
+    addclose=(-S "${${QIPREFIX:+]}:-\]}")
   fi
   if [[ ${(tP)var} = assoc* ]]; then
     local expl
@@ -20,5 +21,13 @@ if [[ $PREFIX = *\[* ]]; then
         compadd $addclose -k "$var"
   fi
 else
-  _parameters "$@"
+  _parameters -g '^a*' "$@" && ret=0
+  
+  if compset -S '\[*'; then
+    set - -S "" "$@"
+  else
+    set - -qS"${${QIPREFIX:+[}:-\[}" "$@"
+  fi
+  _parameters -g 'a*' "$@" && ret=0
+  return ret
 fi

Completion/Builtins/_zpty

@@ -10,7 +10,7 @@ _arguments -C -s \
   '(-r -w -L -e -b)-d[delete command]:*:name:->name' \
   '(-r -L -e -b -d)-w[send string to command]:name:->name:*:strings to write' \
   '(: -r -w -e -b -d)-L[list defined commands as calls]' \
-  '(: -w -L -e -b -d)-r[read string from command]:name:->name:param: _parameters:pattern:' \
+  '(: -w -L -e -b -d)-r[read string from command]:name:->name:param: _vars:pattern:' \
   '(-r -w -L -d):zpty command name:' \
   '(-r -w -L -d):cmd: _command_names -e' \
   '(-r -w -L -d)*::args:_precommand' && return 0
@@ -21,7 +21,7 @@ _arguments -C -s \
 #   - read \
 #     '-r[read string from command]' \
 #     ':name:->name' \
-#     ':param: _parameters' \
+#     ':param: _vars' \
 #     ':pattern:' \
 #   - write \
 #     '-w[send string to command]' \

Completion/Commands/_bash_completions

@@ -34,7 +34,7 @@ case $key in
   '!') _main_complete _command_names
        ;;
   '$') _main_complete - parameters _wanted parameters expl 'exported parameters' \
-                                       compadd -k 'parameters[(R)*export*]'
+                                       _parameters -g '*export*'
        ;;
   '@') _main_complete _hosts
        ;;

Completion/Core/_parameters

@@ -3,6 +3,13 @@
 # This should be used to complete parameter names if you need some of the
 # extra options of compadd. It completes only non-local parameters.
 
-local expl
+# If you specify a -g option with a pattern, the pattern will be used to
+# restrict the type of parameters matched.
 
-_wanted parameters expl parameter compadd "$@" -k 'parameters[(R)^*local*]'
+local expl pattern
+
+pattern=(-g \*)
+zparseopts -D -K -E g:=pattern
+
+_wanted parameters expl parameter compadd "$@" \
+    -k "parameters[(R)${pattern[2]}~*local*]"

Doc/Zsh/compsys.yo

@@ -3470,8 +3470,12 @@ completion functions are called even if there are no matches so far.
 )
 findex(_parameters)
 item(tt(_parameters))(
-This should be used to complete parameter names.  All arguments are
-passed unchanged to the tt(compadd) builtin.
+This should be used to complete parameter names.  tt(_parameters) can
+take a tt(-g var(pattern)) option which specifies that only parameters
+whose type matches the var(pattern) should be completed.  Strings of
+the same form as those returned by the tt(t) parameter expansion flag
+are used here when matching the type.  All other arguments are passed
+unchanged to the tt(compadd) builtin.
 )
 findex(_path_files)
 item(tt(_path_files))(