Fix iteration over indeterminate in rule execution

src/ifcopenshell-python/ifcopenshell/express/rule_compiler.py

@@ -988,6 +988,8 @@ class indeterminate_type:
     __pos__= bop
     __getitem__ = bop
     __getattr__ = bop
+    def __iter__(self):
+        return iter(())
 
 INDETERMINATE = indeterminate_type()
 

src/ifcopenshell-python/ifcopenshell/express/rules/IFC2X3.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X1.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X2.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_ADD1.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_ADD2.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_RC1.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_RC2.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_RC3.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_RC4.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace:

src/ifcopenshell-python/ifcopenshell/express/rules/IFC4X3_TC1.py

@@ -132,6 +132,9 @@ class indeterminate_type:
     __pos__ = bop
     __getitem__ = bop
     __getattr__ = bop
+
+    def __iter__(self):
+        return iter(())
 INDETERMINATE = indeterminate_type()
 
 class enum_namespace: