What is the compopt equivalent in zsh that modifies the current completion options?

Question

I am writing an auto completion script for zsh that I want to enable nospace on certain conditions. The bash equivalent script would look like this

_my_completion(){
  if something; then
    compopt -o nospace
  fi
}

complete -F _my_completion <exec>

How do I achieve the same goal in zsh?

Answer 1

The similar effect can be done using -S '' as compadd argument, as you can see:

_my_completion(){
  # Here you can access ${words[@]}, $BUFFER, $CURSOR, $NAME, $CURRENT...
  if something; then
    completions_array=(foo bar baz)

    # `-S ''` is the equivalent of `compopt -o nospace`
    compadd -S '' -a completions_array
  fi
}

compdef _my_completion <exec>

If you're familiar with bash completions, you can see how zsh completions compare in this script that loads the bash completions in ZSH.