#autoload

# This should be used to complete parameter names if you need some of the
# extra options of compadd. It completes only non-local parameters.

# If you specify a -g option with a pattern, the pattern will be used to
# restrict the type of parameters matched.

if compset -P '*:'; then
  _history_modifiers p
  return
fi

local i pfilt
local -i nm=$compstate[nmatches]
local -a expl pattern=( -g \* ) normal described verbose faked fakes tmp

zstyle -t ":completion:${curcontext}:parameters" prefix-needed &&
    [[ $PREFIX != [_.]* ]] &&
        pfilt='[^_.]'
_description parameters expl parameter
zparseopts -D -K -E g:=pattern

if zstyle -t ":completion:${curcontext}:parameters" extra-verbose; then
  described=(
      "${(@M)${(@k)parameters[(R)$~pattern[2]~*(hideval|local|special)*]}:#$~pfilt*}"
  )
  compadd "$@" "$expl[@]" -D described -a - described
  if (( $#described )); then
    # Normally, calling typeset without flags would print the values of its
    # arguments. However, inside a function, it instead declare its arguments
    # as local variables and outputs nothing. Thus, to force it print out
    # parameter values, we pass it the -m flag.
    verbose=( 
        ${${${(f@)"$( typeset -m ${(@b)described} )"}/=/:}[@]//'\'/'\\'} 
    )
    _describe -t parameters parameter verbose "$@" "$expl[@]"
  fi

  normal=(
      "${(@M)${(@k)parameters[(R)$~pattern[2]~^(*(hideval|special)*)~*local*]}:#$~pfilt*}"
  )
else
  normal=( "${(@M)${(@k)parameters[(R)$~pattern[2]~*local*]}:#$~pfilt*}" )
fi

if zstyle -a ":completion:${curcontext}:" fake-parameters tmp; then
  for i in "$tmp[@]"; do
    if [[ "$i" = *:* ]]; then
      faked=( "$faked[@]" "$i" )
    else
      fakes=( "$fakes[@]" "$i" )
    fi
  done
fi
compadd "$@" "$expl[@]" - "$normal[@]" "${(@)fakes:|described}" \
    "${(@)${(@)${(@M)faked:#${~pattern[2]}}%%:*}:|described}"

(( compstate[nmatches] > nm ))