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                                                                                                                                                                                     #autoload

# Utility function to call a function if it exists.
#
# Usage: _call_function <return> <name> [ <args> ... ]
#
# If a function named <name> is defined (or defined to be autoloaded),
# it is called. If <return> is given not the string `-' or empty, it is
# taken as the name of a parameter and the return status of the function
# called is stored in this parameter. All other arguments are given
# to the function called.
# The return value of this function is zero if the function was
# called and non-zero otherwise.

local _name _ret

[[ "$1" != (|-) ]] && _name="$1"

shift

if (( $+functions[$1] )); then
  "$@"
  _ret="$?"

  [[ -n "$_name" ]] && eval "${_name}=${_ret}"

  compstate[restore]=''

  return 0
fi

return 1