fix cpplint

Author: SteveBronder

test/unit/math/rev/functor/lorenz_ode_typed_fd_test.cpp

@@ -22,14 +22,16 @@ using lorenz_test_types = boost::mp11::mp_product<
 
 TYPED_TEST_SUITE_P(lorenz_test);
 TYPED_TEST_P(lorenz_test, param_and_data_finite_diff) {
-  if constexpr (std::is_same<TypeParam, std::tuple<ode_rk45_functor,
-                                                   ode_rk45_functor>>::value) {
+  constexpr bool is_rk45 = std::is_same<TypeParam, std::tuple<ode_rk45_functor,
+                                                   ode_rk45_functor>>::value;
+  constexpr bool is_ckrk = std::is_same<TypeParam,
+                                    std::tuple<ode_ckrk_functor,
+                                               ode_ckrk_functor>>::value;
+  if constexpr (is_rk45) {
     this->test_fd_vd(1.e-6, 3e-2);
     this->test_fd_dv(1.e-6, 3e-2);
     this->test_fd_vv(1.e-6, 3e-2);
-  } else if constexpr (std::is_same<TypeParam,
-                                    std::tuple<ode_ckrk_functor,
-                                               ode_ckrk_functor>>::value) {
+  } else if constexpr (is_ckrk) {
     this->test_fd_vd(1.e-6, 5e-2);
     this->test_fd_dv(1.e-6, 5e-2);
     this->test_fd_vv(1.e-6, 5e-2);

test/unit/math/test_ad_matvar.hpp

@@ -426,12 +426,12 @@ void expect_ad_matvar_impl(const ad_tolerances& tols, const F& f,
   using stan::math::var;
   using stan::math::var_value;
   using stan::math::test::type_name;
-
+  constexpr bool has_at_least_one_var = stan::math::disjunction<
+                           is_var<scalar_type_t<Types>>...>::value;
   if constexpr (!stan::math::disjunction<is_var_matrix<Types>...>::value) {
     FAIL() << "expect_ad_matvar requires at least one varmat input!"
            << std::endl;
-  } else if constexpr (!stan::math::disjunction<
-                           is_var<scalar_type_t<Types>>...>::value) {
+  } else if constexpr (!has_at_least_one_var) {
     FAIL() << "expect_ad_matvar requires at least one autodiff input!"
            << std::endl;
   } else {