static bool ctxEvalCondition(S cond) {
  SS globals = ctxContext().globals;
  L<S> tok = javaTok(cond);
  S t = get(tok, 1);
  if (l(tok) == 3 && isIdentifier(t))
    ret eq(t, "TRUE") || eq(globals.get(t), "TRUE");
  fail("Unknown condition: " + cond);
}