pymethods: fix support for MSRV

pyo3-macros-backend/src/pymethod.rs

@@ -695,12 +695,14 @@ struct SlotDef {
     return_mode: Option<ReturnMode>,
 }
 
+const NO_ARGUMENTS: &[Ty] = &[];
+
 impl SlotDef {
     const fn new(slot: &'static str, func_ty: &'static str) -> Self {
         SlotDef {
             slot: StaticIdent(slot),
             func_ty: StaticIdent(func_ty),
-            arguments: &[],
+            arguments: NO_ARGUMENTS,
             ret_ty: Ty::Object,
             before_call_method: None,
             extract_error_mode: ExtractErrorMode::Raise,

src/class/basic.rs

@@ -41,17 +41,6 @@ impl CompareOp {
             _ => None,
         }
     }
-
-    pub fn matches_ordering(self, ordering: std::cmp::Ordering) -> bool {
-        match self {
-            CompareOp::Lt => ordering.is_lt(),
-            CompareOp::Le => ordering.is_le(),
-            CompareOp::Eq => ordering.is_eq(),
-            CompareOp::Ne => ordering.is_ne(),
-            CompareOp::Gt => ordering.is_gt(),
-            CompareOp::Ge => ordering.is_ge(),
-        }
-    }
 }
 
 /// Basic Python class customization

tests/test_proto_methods.rs

@@ -2,7 +2,7 @@
 
 use pyo3::exceptions::PyValueError;
 use pyo3::types::{PySlice, PyType};
-use pyo3::{basic::CompareOp, exceptions::PyAttributeError, prelude::*};
+use pyo3::{exceptions::PyAttributeError, prelude::*};
 use pyo3::{ffi, py_run, AsPyPointer, PyCell};
 use std::{isize, iter};
 
@@ -56,10 +56,6 @@ impl ExampleClass {
         i64_value as u64
     }
 
-    fn __richcmp__(&self, other: &Self, op: CompareOp) -> bool {
-        op.matches_ordering(self.value.cmp(&other.value))
-    }
-
     fn __bool__(&self) -> bool {
         self.value != 0
     }
@@ -156,18 +152,6 @@ fn test_hash() {
     })
 }
 
-#[test]
-fn test_richcmp() {
-    Python::with_gil(|py| {
-        let example_py = make_example(py);
-        assert!(example_py
-            .rich_compare(example_py, CompareOp::Eq)
-            .unwrap()
-            .is_true()
-            .unwrap());
-    })
-}
-
 #[test]
 fn test_bool() {
     Python::with_gil(|py| {