nixpkgs/pkgs/applications/science/astronomy/openspace/constexpr.patch

diff --git a/include/openspace/util/distanceconversion.h b/include/openspace/util/distanceconversion.h
index 80a3a96..7059752 100755
--- a/include/openspace/util/distanceconversion.h
+++ b/include/openspace/util/distanceconversion.h
@@ -159,24 +159,34 @@ constexpr const char* nameForDistanceUnit(DistanceUnit unit, bool pluralForm = f
 }
 
 constexpr DistanceUnit distanceUnitFromString(const char* unitName) {
+    int result = -1;
+  
     int i = 0;
     for (const char* val : DistanceUnitNamesSingular) {
         if (ghoul::equal(unitName, val)) {
-            return static_cast<DistanceUnit>(i);
+            result = i;
+            break;
         }
         ++i;
     }
 
-    i = 0;
-    for (const char* val : DistanceUnitNamesPlural) {
-        if (ghoul::equal(unitName, val)) {
-            return static_cast<DistanceUnit>(i);
+    if (result == -1) {
+        i = 0;
+        for (const char* val : DistanceUnitNamesPlural) {
+            if (ghoul::equal(unitName, val)) {
+                result = i;
+                break;
+            }
+            ++i;
         }
-        ++i;
     }
 
-    ghoul_assert(false, "Unit name is not a valid name");
-    throw ghoul::MissingCaseException();
+    if (result != -1)
+        return static_cast<DistanceUnit>(result);
+    else {
+        ghoul_assert(false, "Unit name is not a valid name");
+        throw ghoul::MissingCaseException();
+    }
 }
 
 
diff --git a/include/openspace/util/timeconversion.h b/include/openspace/util/timeconversion.h
index a36c92a..699bca9 100755
--- a/include/openspace/util/timeconversion.h
+++ b/include/openspace/util/timeconversion.h
@@ -142,23 +142,32 @@ constexpr const char* nameForTimeUnit(TimeUnit unit, bool pluralForm = false) {
 }
 
 constexpr TimeUnit timeUnitFromString(const char* unitName) {
+    int result = -1;
+    
     int i = 0;
     for (const char* val : TimeUnitNamesSingular) {
         if (ghoul::equal(unitName, val)) {
-            return static_cast<TimeUnit>(i);
+            result = i;
+            break;
         }
         ++i;
     }
 
-    i = 0;
-    for (const char* val : TimeUnitNamesPlural) {
-        if (ghoul::equal(unitName, val)) {
-            return static_cast<TimeUnit>(i);
+    if (result == -1) {
+        i = 0;
+        for (const char* val : TimeUnitNamesPlural) {
+            if (ghoul::equal(unitName, val)) {
+                result = i;
+                break;
+            }
+            ++i;
         }
-        ++i;
     }
 
-    throw ghoul::MissingCaseException();
+    if (result != -1)
+        return static_cast<TimeUnit>(result);
+    else
+        throw ghoul::MissingCaseException();
 }
 
 std::pair<double, std::string> simplifyTime(double seconds,