Fix #363 Exception in automation analysis

Yafc.Model/Analysis/DependencyNode.cs

@@ -119,6 +119,10 @@ internal static DependencyNode Create(IEnumerable<DependencyNode> dependencies)
             }
             realDependencies = realDependencies.Distinct().ToList();
 
+            if (realDependencies.Count == 0) {
+                throw new ArgumentException($"Must not join zero nodes with an 'and'. Instead, create an empty DependencyList to explain what expected dependencies are missing.");
+            }
+
             // Prevent single-child nodes, so the drawing and preceding unpacking code doesn't have to handle that.
             if (realDependencies.Count == 1) {
                 return realDependencies[0];
@@ -175,6 +179,10 @@ internal static DependencyNode Create(IEnumerable<DependencyNode> dependencies)
             }
             realDependencies = realDependencies.Distinct().ToList();
 
+            if (realDependencies.Count == 0) {
+                throw new ArgumentException($"Must not join zero nodes with an 'or'. Instead, create an empty DependencyList to explain what expected dependencies are missing.");
+            }
+
             // Prevent single-child nodes, so the drawing and preceding unpacking code doesn't have to handle that.
             if (realDependencies.Count == 1) {
                 return realDependencies[0];
@@ -186,7 +194,7 @@ internal static DependencyNode Create(IEnumerable<DependencyNode> dependencies)
         internal override IEnumerable<FactorioId> Flatten() => dependencies.SelectMany(d => d.Flatten());
 
         internal override bool IsAccessible(Func<FactorioId, bool> isAccessible) => dependencies.Any(d => d.IsAccessible(isAccessible));
-        internal override Bits AggregateBits(Func<FactorioId, Bits> getBits) => dependencies.Select(d => d.AggregateBits(getBits)).Min();
+        internal override Bits AggregateBits(Func<FactorioId, Bits> getBits) => dependencies.Min(d => d.AggregateBits(getBits));
         internal override AutomationStatus IsAutomatable(Func<FactorioId, AutomationStatus> isAutomatable, AutomationStatus automationState)
             => dependencies.Max(d => d.IsAutomatable(isAutomatable, automationState));
 
@@ -234,7 +242,7 @@ internal override Bits AggregateBits(Func<FactorioId, Bits> getBits) {
                 return bits;
             }
             else if (dependencies.elements.Length > 0) {
-                return bits | dependencies.elements.Select(getBits).Min();
+                return bits | dependencies.elements.Min(getBits);
             }
             return bits;
         }

Yafc.Model/Data/DataClasses.cs

@@ -540,24 +540,32 @@ public float Power(Quality quality)
     internal Lazy<Entity?>? getSpoilResult;
 
     public sealed override DependencyNode GetDependencies() {
-        List<DependencyList> collector = [];
+        List<DependencyNode> collector = [];
         if (energy != null) {
-            collector.Add(new(energy.fuels, DependencyList.Flags.Fuel));
+            collector.Add(new DependencyList(energy.fuels, DependencyList.Flags.Fuel));
         }
-        if (spawnLocations.Length != 0) {
-            collector.Add(new(spawnLocations, DependencyList.Flags.Location));
+        if (mapGenerated) {
+            if (itemsToPlace.Length != 0) {
+                collector.Add(DependencyNode.RequireAny(
+                    new DependencyList(spawnLocations, DependencyList.Flags.Location),
+                    new DependencyList(itemsToPlace, DependencyList.Flags.ItemToPlace)));
+            }
+            else {
+                collector.Add(new DependencyList(spawnLocations, DependencyList.Flags.Location));
+            }
         }
 
         if (sourceEntities.Count > 0) {
             // Asteroid chunks require locations OR bigger-asteroid
-            collector.Add(new(sourceEntities, DependencyList.Flags.Source));
+            collector.Add(new DependencyList(sourceEntities, DependencyList.Flags.Source));
             return DependencyNode.RequireAny(collector);
         }
 
         if (captureAmmo.Count == 0) {
             if (!mapGenerated) {
-                collector.Add(new(itemsToPlace, DependencyList.Flags.ItemToPlace));
+                collector.Add(new DependencyList(itemsToPlace, DependencyList.Flags.ItemToPlace));
             }
+
             return DependencyNode.RequireAll(collector);
         }
 
@@ -600,7 +608,12 @@ public sealed override DependencyNode GetDependencies() {
             nonFuel.Add(DependencyNode.Create(new(Array.Empty<FactorioId>(), DependencyList.Flags.Source)));
         }
 
-        return DependencyNode.RequireAll(DependencyNode.Create(collector[0]), DependencyNode.RequireAny(nonFuel));
+        if (energy != null) {
+            return DependencyNode.RequireAll(collector[0] /* fuel */, DependencyNode.RequireAny(nonFuel));
+        }
+        else { // Doesn't require fuel
+            return DependencyNode.RequireAny(nonFuel);
+        }
     }
 
     private sealed class ListComparer : IEqualityComparer<List<EntitySpawner>> {

changelog.txt

@@ -15,6 +15,11 @@
 //     Internal changes:
 //         Changes to the code that do not affect the behavior of the program.
 ----------------------------------------------------------------------------------------------------------------------
+Version:
+Date:
+    Fixes:
+        - "Map generated" entities that don't generate in any locations could break automation analysis.
+----------------------------------------------------------------------------------------------------------------------
 Version: 2.4.0
 Date: November 21st 2024
     Features: