__repr__ in typing (RustPython#5870)

* ParamSpec.__repr__

* Fix more repr

Author: youknowone

Lib/test/test_typing.py

@@ -1436,8 +1436,6 @@ class G2(Generic[Unpack[Ts]]): pass
             with self.assertRaises(TypeError):
                 C[int, Unpack[Ts], Unpack[Ts]]
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_repr_is_correct(self):
         Ts = TypeVarTuple('Ts')
 
@@ -1555,8 +1553,6 @@ class A(Generic[Unpack[Ts]]): pass
         self.assertEndsWith(repr(K[float]), 'A[float, typing.Unpack[typing.Tuple[str, ...]]]')
         self.assertEndsWith(repr(K[float, str]), 'A[float, str, typing.Unpack[typing.Tuple[str, ...]]]')
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_cannot_subclass(self):
         with self.assertRaisesRegex(TypeError, NOT_A_BASE_TYPE % 'TypeVarTuple'):
             class C(TypeVarTuple): pass
@@ -3634,8 +3630,6 @@ def test_new_repr_complex(self):
             'typing.List[typing.Tuple[typing.List[int], typing.List[int]]]'
         )
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_new_repr_bare(self):
         T = TypeVar('T')
         self.assertEqual(repr(Generic[T]), 'typing.Generic[~T]')
@@ -4300,8 +4294,6 @@ class Y(C[int]):
         self.assertEqual(Y.__qualname__,
                          'GenericTests.test_repr_2.<locals>.Y')
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_repr_3(self):
         T = TypeVar('T')
         T1 = TypeVar('T1')

vm/src/stdlib/typing.rs

@@ -343,7 +343,7 @@ pub(crate) mod decl {
         infer_variance: bool,
     }
 
-    #[pyclass(flags(HAS_DICT), with(AsNumber, Constructor))]
+    #[pyclass(flags(HAS_DICT), with(AsNumber, Constructor, Representable))]
     impl ParamSpec {
         #[pymethod]
         fn __mro_entries__(&self, _bases: PyObjectRef, vm: &VirtualMachine) -> PyResult {
@@ -555,6 +555,14 @@ pub(crate) mod decl {
         }
     }
 
+    impl Representable for ParamSpec {
+        #[inline(always)]
+        fn repr_str(zelf: &crate::Py<Self>, vm: &VirtualMachine) -> PyResult<String> {
+            let name = zelf.__name__().str(vm)?;
+            Ok(format!("~{name}"))
+        }
+    }
+
     pub(crate) fn make_paramspec(name: PyObjectRef) -> ParamSpec {
         ParamSpec {
             name,
@@ -739,7 +747,7 @@ pub(crate) mod decl {
         #[inline(always)]
         fn repr_str(zelf: &crate::Py<Self>, vm: &VirtualMachine) -> PyResult<String> {
             let name = zelf.name.str(vm)?;
-            Ok(format!("*{name}"))
+            Ok(name.to_string())
         }
     }
 
@@ -960,7 +968,7 @@ pub(crate) mod decl {
     }
 
     #[pyattr]
-    #[pyclass(name)]
+    #[pyclass(name = "Generic", module = "typing")]
     #[derive(Debug, PyPayload)]
     #[allow(dead_code)]
     pub(crate) struct Generic {}