small result fixes

test/core/utils/ResultTest.cpp

@@ -5,13 +5,15 @@
 #include "matador/utils/result.hpp"
 
 namespace matador::test {
+namespace {
 enum class math_error : int32_t {
   OK = 0,
   DIVISION_BY_ZERO = 1,
   FAILURE = 2
 };
+}
 
-utils::result<float, math_error>divide(const float x, const float y) {
+static utils::result<float, math_error>divide(const float x, const float y) {
   if (y == 0) {
     return utils::failure(math_error::DIVISION_BY_ZERO);
   }
@@ -19,15 +21,15 @@ utils::result<float, math_error>divide(const float x, const float y) {
   return utils::ok(x / y);
 }
 
-utils::result<float, math_error>multiply(const float x, const float y) {
+static utils::result<float, math_error>multiply(const float x, const float y) {
   return utils::ok(x * y);
 }
 
-utils::result<float, math_error>plus(const float x, const float y) {
+static utils::result<float, math_error>plus(const float x, const float y) {
   return utils::ok(x + y);
 }
 
-utils::result<void, math_error>action_on_greater_42(const float i) {
+static utils::result<void, math_error>action_on_greater_42(const float i) {
   if (i > 42) {
     return utils::ok<void>();
   }
@@ -88,7 +90,7 @@ TEST_CASE("Test result", "[result]") {
   REQUIRE(!res2.is_ok());
   REQUIRE(res2.is_error());
   const auto e = res2.err();
-//  REQUIRE(res2.err() == "division by zero error");
+  REQUIRE(res2.err() == "division by zero error");
 
   res = test::divide(4, 2)
     .and_then([](const auto &val) { return test::multiply(val, 5); })