python · JukkaL · May 7, 2026 · May 7, 2026
diff --git a/mypyc/lib-rt/vecs/librt_vecs.c b/mypyc/lib-rt/vecs/librt_vecs.c
@@ -74,8 +74,6 @@
 #include <Python.h>
 #include "librt_vecs.h"
 
-#ifdef MYPYC_EXPERIMENTAL
-
 PyTypeObject *LibRTVecs_I64TypeObj;
 PyTypeObject *LibRTVecs_I32TypeObj;
 PyTypeObject *LibRTVecs_I16TypeObj;
@@ -982,22 +980,17 @@ static VecCapsule Capsule = {
     get_vec_type,
 };
 
-#endif  // MYPYC_EXPERIMENTAL
-
 static PyMethodDef VecsMethods[] = {
-#ifdef MYPYC_EXPERIMENTAL
     {"append",  vec_append, METH_VARARGS, "Append a value to the end of a vec"},
     {"remove",  vec_remove, METH_VARARGS, "Remove first occurrence of value from a vec"},
     {"pop",  vec_pop, METH_VARARGS, "Remove and return vec item at index (default last)"},
     {"extend",  vec_extend, METH_VARARGS, "Extend a vec with items from an iterable"},
-#endif
     {NULL, NULL, 0, NULL}        /* Sentinel */
 };
 
 static int
 librt_vecs_module_exec(PyObject *m)
 {
-#ifdef MYPYC_EXPERIMENTAL
     PyObject *ext = PyImport_ImportModule("mypy_extensions");
     if (ext == NULL) {
         return -1;
@@ -1109,7 +1102,6 @@ librt_vecs_module_exec(PyObject *m)
     }
 
     Py_DECREF(ext);
-#endif
     return 0;
 }
 

diff --git a/mypyc/lib-rt/vecs/librt_vecs.h b/mypyc/lib-rt/vecs/librt_vecs.h
@@ -20,8 +20,6 @@
 // ABI version is changed, but see the comment above).
 #define LIBRT_VECS_API_VERSION 1
 
-#ifdef MYPYC_EXPERIMENTAL
-
 // Magic (native) integer return value on exception. Caller must also
 // use PyErr_Occurred() since this overlaps with valid integer values.
 #define MYPYC_INT_ERROR -113
@@ -997,6 +995,4 @@ int Vec_GenericRemove(Py_ssize_t *len, PyObject **items, PyObject *item);
 PyObject *Vec_GenericPopWrapper(Py_ssize_t *len, PyObject **items, PyObject *args);
 PyObject *Vec_GenericPop(Py_ssize_t *len, PyObject **items, Py_ssize_t index);
 
-#endif  // MYPYC_EXPERIMENTAL
-
 #endif  // VEC_H_INCL
diff --git a/mypyc/lib-rt/vecs/librt_vecs_api.c b/mypyc/lib-rt/vecs/librt_vecs_api.c
@@ -1,16 +1,5 @@
 #include "librt_vecs_api.h"
 
-#ifndef MYPYC_EXPERIMENTAL
-
-int
-import_librt_vecs(void)
-{
-    // All librt.vecs features are experimental for now, so don't set up the API here
-    return 0;
-}
-
-#else
-
 VecCapsule *VecApi = NULL;
 VecI64API VecI64Api = {0};
 VecI32API VecI32Api = {0};
@@ -60,5 +49,3 @@ import_librt_vecs(void)
     VecNestedApi = *VecApi->nested;
     return 0;
 }
-
-#endif // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/librt_vecs_api.h b/mypyc/lib-rt/vecs/librt_vecs_api.h
@@ -10,8 +10,6 @@
 int
 import_librt_vecs(void);
 
-#ifdef MYPYC_EXPERIMENTAL
-
 // Global API pointers initialized by import_librt_vecs()
 extern VecCapsule *VecApi;
 extern VecI64API VecI64Api;
@@ -23,6 +21,4 @@ extern VecBoolAPI VecBoolApi;
 extern VecTAPI VecTApi;
 extern VecNestedAPI VecNestedApi;
 
-#endif  // MYPYC_EXPERIMENTAL
-
 #endif  // LIBRT_VECS_API_H
diff --git a/mypyc/lib-rt/vecs/vec_bool.c b/mypyc/lib-rt/vecs/vec_bool.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 #define VEC VecBool
 #define VEC_TYPE VecBoolType
 #define VEC_OBJECT VecBoolObject
@@ -17,5 +16,3 @@
 #define BUFFER_FORMAT "b"
 
 #include "vec_template.c"
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_float.c b/mypyc/lib-rt/vecs/vec_float.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 #define VEC VecFloat
 #define VEC_TYPE VecFloatType
 #define VEC_OBJECT VecFloatObject
@@ -18,5 +17,3 @@
 #define BUFFER_FORMAT "d"
 
 #include "vec_template.c"
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_i16.c b/mypyc/lib-rt/vecs/vec_i16.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 #define VEC VecI16
 #define VEC_TYPE VecI16Type
 #define VEC_OBJECT VecI16Object
@@ -18,5 +17,3 @@
 #define BUFFER_FORMAT "h"
 
 #include "vec_template.c"
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_i32.c b/mypyc/lib-rt/vecs/vec_i32.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 #define VEC VecI32
 #define VEC_TYPE VecI32Type
 #define VEC_OBJECT VecI32Object
@@ -18,5 +17,3 @@
 #define BUFFER_FORMAT "i"
 
 #include "vec_template.c"
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_i64.c b/mypyc/lib-rt/vecs/vec_i64.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 #define VEC VecI64
 #define VEC_TYPE VecI64Type
 #define VEC_OBJECT VecI64Object
@@ -18,5 +17,3 @@
 #define BUFFER_FORMAT "q"
 
 #include "vec_template.c"
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_nested.c b/mypyc/lib-rt/vecs/vec_nested.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 // Implementation of nested vec[t], when t is a vec type.
 //
 // Examples of types supported:
@@ -764,5 +763,3 @@ VecNestedAPI Vec_NestedAPI = {
     VecNested_Extend,
     VecNested_ExtendVec,
 };
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_t.c b/mypyc/lib-rt/vecs/vec_t.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 // Implementation of generic vec[t], when t is a plain type object (possibly optional).
 //
 // Examples of types supported:
@@ -838,5 +837,3 @@ VecTAPI Vec_TAPI = {
     VecT_ToList,
     VecT_ToTuple,
 };
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_template.c b/mypyc/lib-rt/vecs/vec_template.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 // NOTE: This file can't be compiled on its own, it must be #included
 //       with certain #defines set, as described below.
 //
@@ -821,5 +820,3 @@ NAME(API) FEATURES = {
 #undef VEC_CAP
 #undef VEC_INCREF
 #undef VEC_DECREF
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs/vec_u8.c b/mypyc/lib-rt/vecs/vec_u8.c
@@ -1,4 +1,3 @@
-#ifdef MYPYC_EXPERIMENTAL
 #define VEC VecU8
 #define VEC_TYPE VecU8Type
 #define VEC_OBJECT VecU8Object
@@ -18,5 +17,3 @@
 #define BUFFER_FORMAT "B"
 
 #include "vec_template.c"
-
-#endif  // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs_extra_ops.c b/mypyc/lib-rt/vecs_extra_ops.c
@@ -3,8 +3,4 @@
 
 #include "vecs_extra_ops.h"
 
-#ifdef MYPYC_EXPERIMENTAL
-
 // All operations are currently implemented as inline functions in vecs_extra_ops.h
-
-#endif // MYPYC_EXPERIMENTAL
diff --git a/mypyc/lib-rt/vecs_extra_ops.h b/mypyc/lib-rt/vecs_extra_ops.h
@@ -1,8 +1,6 @@
 #ifndef VECS_EXTRA_OPS_H
 #define VECS_EXTRA_OPS_H
 
-#ifdef MYPYC_EXPERIMENTAL
-
 #include "vecs/librt_vecs_api.h"
 
 // Check if obj is an instance of vec (any vec type)
@@ -17,6 +15,4 @@ static inline PyObject *CPyVecU8_ToBytes(VecU8 v) {
     return PyBytes_FromStringAndSize((const char *)v.items, v.len);
 }
 
-#endif // MYPYC_EXPERIMENTAL
-
 #endif
diff --git a/mypyc/primitives/librt_vecs_ops.py b/mypyc/primitives/librt_vecs_ops.py
@@ -16,7 +16,6 @@
     return_type=bit_rprimitive,
     c_function_name="CPyVec_Check",
     error_kind=ERR_NEVER,
-    experimental=True,
     dependencies=[LIBRT_VECS, VECS_EXTRA_OPS],
 )
 
@@ -27,6 +26,5 @@
     return_type=bytes_rprimitive,
     c_function_name="CPyVecU8_ToBytes",
     error_kind=ERR_MAGIC,
-    experimental=True,
     dependencies=[LIBRT_VECS, VECS_EXTRA_OPS],
 )
diff --git a/mypyc/test-data/capsule-deps.test b/mypyc/test-data/capsule-deps.test
@@ -79,15 +79,15 @@ def f() -> bytes:
 Capsule(name='librt.base64')
 Capsule(name='librt.strings')
 
-[case testVecCapsuleDepInFunction_experimental]
+[case testVecCapsuleDepInFunction]
 from librt.vecs import vec
 
 def f() -> None:
     vec[str]()
 [out]
 Capsule(name='librt.vecs')
 
-[case testVecCapsuleDepInMethod_experimental]
+[case testVecCapsuleDepInMethod]
 from librt.vecs import vec
 
 class C:
@@ -96,14 +96,14 @@ class C:
 [out]
 Capsule(name='librt.vecs')
 
-[case testVecCapsuleDepAtTopLevel_experimental]
+[case testVecCapsuleDepAtTopLevel]
 from librt.vecs import vec
 
 vec[str]()
 [out]
 Capsule(name='librt.vecs')
 
-[case testVecCapsuleDepInAttributeType_experimental]
+[case testVecCapsuleDepInAttributeType]
 from librt.vecs import vec
 
 class C:

diff --git a/mypyc/test-data/irbuild-vec-misc.test b/mypyc/test-data/irbuild-vec-misc.test
@@ -342,7 +342,7 @@ L0:
     x = r13
     return x
 
-[case testVecU8ToBytes_experimental]
+[case testVecU8ToBytes]
 from librt.vecs import vec
 from mypy_extensions import u8
 

diff --git a/mypyc/test-data/run-vecs-i64-interp.test b/mypyc/test-data/run-vecs-i64-interp.test
@@ -1,4 +1,4 @@
-[case testLibrtVecsI64Interpreted_librt_experimental]
+[case testLibrtVecsI64Interpreted_librt]
 # Test cases for vec[i64], using generic operations (simulates use from interpreted code).
 #
 # These also act as test cases for specialized vec types in general (e.g. vec[float]),

diff --git a/mypyc/test-data/run-vecs-i64.test b/mypyc/test-data/run-vecs-i64.test
@@ -1,7 +1,7 @@
 -- Test cases for vec[i64]. These also partially cover other unboxed item types,
 -- which use a similar runtime representation.
 
-[case testVecI64BasicOps_librt_experimental]
+[case testVecI64BasicOps_librt]
 from typing import Final, Any, Iterable, Tuple
 
 from mypy_extensions import i64, i32

diff --git a/mypyc/test-data/run-vecs-misc-interp.test b/mypyc/test-data/run-vecs-misc-interp.test
@@ -1,4 +1,4 @@
-[case testLibrtVecsMiscInterpreted_librt_experimental]
+[case testLibrtVecsMiscInterpreted_librt]
 # Test cases for vec[<value primitive type>]. using generic operations.
 # This simulates use from interpreted code.
 #
@@ -538,7 +538,7 @@ def test_extend_bool() -> None:
     v = extend(v, [False, True])
     assert v == vec[bool]([True, False, True])
 
-[case testLibrtVecsBufferProtocol_librt_experimental]
+[case testLibrtVecsBufferProtocol_librt]
 import struct
 from typing import Any
 
@@ -639,14 +639,3 @@ def test_buffer_extend_from_shared_buffer() -> None:
     v = extend(old, memoryview_(new))
     assert v == vec[u8]([1, 2, 1, 2, 3])
     assert new == vec[u8]([1, 2, 3])
-
-[case testLibrtVecsFeaturesNotAvailableInNonExperimentalBuild_librt]
-# This also ensures librt.vecs can be built without experimental features
-import librt.vecs
-
-def test_features_not_available() -> None:
-    vecs: object = getattr(librt, "vecs")
-    assert not hasattr(vecs, "vec")
-    assert not hasattr(vecs, "append")
-    assert not hasattr(vecs, "remove")
-    assert not hasattr(vecs, "pop")
diff --git a/mypyc/test-data/run-vecs-misc.test b/mypyc/test-data/run-vecs-misc.test
@@ -4,7 +4,7 @@
 --
 -- vec[i64] test cases are in run-vecs-i64.test.
 
-[case testVecMiscBasicOps_librt_experimental]
+[case testVecMiscBasicOps_librt]
 # mypy: allow-redefinition-old
 
 from typing import Any, Iterable, cast

diff --git a/mypyc/test-data/run-vecs-nested-interp.test b/mypyc/test-data/run-vecs-nested-interp.test
@@ -1,4 +1,4 @@
-[case testLibrtVecsNestedInterpreted_librt_experimental]
+[case testLibrtVecsNestedInterpreted_librt]
 # Test cases for nested vecs, using generic operations (simulates use from interpreted code).
 
 import sys

diff --git a/mypyc/test-data/run-vecs-nested.test b/mypyc/test-data/run-vecs-nested.test
@@ -1,4 +1,4 @@
-[case testVecNestedBasicOps_librt_experimental]
+[case testVecNestedBasicOps_librt]
 from typing import Final, Any, Iterable, Optional, Tuple
 import sys
 

diff --git a/mypyc/test-data/run-vecs-t-interp.test b/mypyc/test-data/run-vecs-t-interp.test
@@ -1,4 +1,4 @@
-[case testLibrtVecsTInterpreted_librt_experimental]
+[case testLibrtVecsTInterpreted_librt]
 # Test cases for vec[<ref type>], using generic operations (simulates use from interpreted code).
 import sys
 from typing import cast, List, Any

diff --git a/mypyc/test-data/run-vecs-t.test b/mypyc/test-data/run-vecs-t.test
@@ -1,7 +1,7 @@
 -- Test cases for vec[t] where t is a boxed, non-vec type (PyObject *).
 -- Also tests for vec[t | None], which uses the same representation.
 
-[case testVecTBasicOps_librt_experimental]
+[case testVecTBasicOps_librt]
 from typing import Final, Any, Iterable, Optional, Tuple
 
 from mypy_extensions import i64