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srecord noeq LeftArrowScriptAutoCompleter(GazelleV_LeftArrowScriptParser parser) {
  LS tok;
  CharInToken cursor;
  S typedCharacters;

  void seek(S text, int iChar) {
    parser.setText(text);
    parser.init();
    tok = parser.tok;
    cursor = charIndexToCharInToken(tok, iChar);
    
    // move one token left if necessary
    if (cursor.iTok > 1 && cursor.iChar == 0 && empty(space())) {
      cursor.iTok -= 2;
      cursor.iChar = l(token());
    }
    
    typedCharacters = takeFirst(cursor.token(), cursor.iChar);
  }
  
  S typedCharacters() {
    printVars ifdef LeftArrowScriptAutoCompleter_debug(+cursor);
    ret typedCharacters;
  }
  
  S space() { ret get(tok, cursor.iTok-1); }
  S token() { ret get(tok, cursor.iTok); }
  S prevToken() { ret get(tok, cursor.iTok-2); }
  
  bool beginningOfCmd() {
    ret eqOneOf(prevToken(), ";", "{", "}")
      || containsNewLine(space());
  }

  Cl<S> getCompletions() { ret searcher()!; }
  
  ScoredStringSearcher searcher() {
    ScoredStringSearcher searcher = new(typedCharacters);
    if (empty(typedCharacters)) searcher.returnAll = true;
    
    S prev = prevToken();
    
    printVars ifdef LeftArrowScriptAutoCompleter_debug(+beginningOfCmd(), +prev, +cursor, +typedCharacters);
    if (!beginningOfCmd() && isIdentifier(prev)) {
      print ifdef LeftArrowScriptAutoCompleter_debug("Adding true and false etc");
      searcher.addAll("true", "false", "null");
    } else
      searcher.addAll(globalMethodNames());
    ret searcher;
  }

  swappable Cl<S> globalMethodNames() {
    ret concatMap methodNames(parser.functionContainers);
  }
}