interpreter: make trivial_operators per-class

Do not call update() and Enum.__hash__ a gazillion times; trivial
operators are the same for every instance of the class.

Introduce the infrastructure to build the MRO-resolved operators (so
the outcome same as if one called super().__init__) for each subclass
of InterpreterObject.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/mesonbuild/interpreter/primitives/array.py b/mesonbuild/interpreter/primitives/array.py
index 6582d4b60..088f1758b 100644
--- a/mesonbuild/interpreter/primitives/array.py
+++ b/mesonbuild/interpreter/primitives/array.py
@@ -27,6 +27,14 @@ if T.TYPE_CHECKING:
     from ...interpreterbase import TYPE_kwargs
 
 class ArrayHolder(ObjectHolder[T.List[TYPE_var]], IterableObject):
+    # Operators that only require type checks
+    TRIVIAL_OPERATORS = {
+        MesonOperator.EQUALS: (list, lambda obj, x: obj.held_object == x),
+        MesonOperator.NOT_EQUALS: (list, lambda obj, x: obj.held_object != x),
+        MesonOperator.IN: (object, lambda obj, x: x in obj.held_object),
+        MesonOperator.NOT_IN: (object, lambda obj, x: x not in obj.held_object),
+    }
+
     def __init__(self, obj: T.List[TYPE_var], interpreter: 'Interpreter') -> None:
         super().__init__(obj, interpreter)
         self.methods.update({
@@ -35,13 +43,6 @@ class ArrayHolder(ObjectHolder[T.List[TYPE_var]], IterableObject):
             'get': self.get_method,
         })
 
-        self.trivial_operators.update({
-            MesonOperator.EQUALS: (list, lambda obj, x: obj.held_object == x),
-            MesonOperator.NOT_EQUALS: (list, lambda obj, x: obj.held_object != x),
-            MesonOperator.IN: (object, lambda obj, x: x in obj.held_object),
-            MesonOperator.NOT_IN: (object, lambda obj, x: x not in obj.held_object),
-        })
-
         # Use actual methods for functions that require additional checks
         self.operators.update({
             MesonOperator.PLUS: ArrayHolder.op_plus,