static S jreplace1(S s, S in, S out) {
  ret jreplace1(s, in, out, null);
}

static S jreplace1(S s, S in, S out, O condition) {
  L<S> tok = javaTok(s);
  ret jreplace1(tok, in, out, condition) ? join(tok) : s;
}

// leaves tok properly tokenized
// returns true iff anything was replaced
static boolean jreplace1(L<S> tok, S in, S out) {
  ret jreplace1(tok, in, out, false, true, null);
}

static boolean jreplace1(L<S> tok, S in, S out, O condition) {
  ret jreplace1(tok, in, out, false, true, condition);
}

static boolean jreplace1(L<S> tok, S in, S out, boolean ignoreCase, boolean reTok, O condition) {
  L<S> tokin = javaTok(in);
  jfind_preprocess(tokin);

  boolean anyChange = false;
  int i = 1;
  while ((i = findCodeTokens(tok, i, ignoreCase, toStringArray(codeTokensOnly(tokin)), condition)) >= 0) {
    L<S> subList = tok.subList(i-1, i+l(tokin)-1); // N to N
    S expansion = jreplaceExpandRefs(out, subList);
    int end = i+l(tokin)-2;
    clearAllTokens(tok, i, end); // C to C
    tok.set(i, expansion);
    int l = l(tok);
    if (reTok) // would this ever be false??
      reTok(tok, i, end);
    i = end+l(tok)-l;
    anyChange = true;
  }
  ret anyChange;
}

static bool jreplace1_debug;

Began life as a copy of #1002133