interpreter: Add IntegerHolder

1 files changed, 4 insertions, 0 deletions

diff --git a/mesonbuild/interpreterbase/baseobjects.py b/mesonbuild/interpreterbase/baseobjects.py
index b28654a..4b538fb 100644
--- a/mesonbuild/interpreterbase/baseobjects.py
+++ b/mesonbuild/interpreterbase/baseobjects.py
@@ -111,6 +111,9 @@ class InterpreterObject:
         ))
 
     def op_equals(self, other: TYPE_var) -> bool:
+        # We use `type(...) == type(...)` here to enforce an *exact* match for comparison. We
+        # don't want comparisons to be possible where `isinstance(derived_obj, type(base_obj))`
+        # would pass because this comparison must never be true: `derived_obj == base_obj`
         if type(self) != type(other):
             self._throw_comp_exception(other, '==')
         return self == other
@@ -148,6 +151,7 @@ class ObjectHolder(InterpreterObject, T.Generic[InterpreterObjectTypeVar]):
 
     # Override default comparison operators for the held object
     def op_equals(self, other: TYPE_var) -> bool:
+        # See the comment from InterpreterObject why we are using `type()` here.
         if type(self.held_object) != type(other):
             self._throw_comp_exception(other, '==')
         return self.held_object == other