public static boolean yield_statement(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "yield_statement")) return false;
    boolean r, p;
    Marker m = enter_section_(b, l, _NONE_, YIELD_STATEMENT, "<yield statement>");
    r = insideSwitchExpression(b, l + 1);
    r = r && consumeToken(b, KW_YIELD);
    p = r; // pin = 2
    r = r && expression(b, l + 1, -1);
    exit_section_(b, l, m, r, p, null);
    return r || p;
  }
public static boolean yield_statement(PsiBuilder b, int l)