pyright: fix some errors

Author: adsharma

native/src/regex_wrapper.pyi

@@ -0,0 +1,11 @@
+from typing import List, Optional
+
+def compile_pattern(pattern: str) -> int: ...
+def match_compiled(id: int, text: str) -> bool: ...
+def release_compiled(id: int) -> None: ...
+def match(pattern: str, text: str) -> bool: ...
+def search_pattern(id: int, text: str) -> Optional[str]: ...
+def findall_pattern(id: int, text: str) -> List[str]: ...
+def free_matches(matches: List[str]) -> None: ...
+def substitute_pattern(id: int, text: str, replacement: str) -> Optional[str]: ...
+def free(ptr: object) -> None: ...

src/stdlib/re.py

@@ -1,3 +1,5 @@
+from typing import cast
+
 import cffi
 
 from stdlib._cffi_util import load_library
@@ -45,7 +47,7 @@ def search(self, text: str) -> str | None:
         if result:
             ptr = result
             try:
-                result_bytes: bytes = ffi.string(result)
+                result_bytes = cast(bytes, ffi.string(result))
                 return result_bytes.decode("utf-8")
             finally:
                 lib.free(ptr)
@@ -60,7 +62,9 @@ def findall(self, text: str) -> list[str]:
                 # Convert the array of C strings to a Python list
                 i = 0
                 while matches_ptr[i]:
-                    matches.append(ffi.string(matches_ptr[i]).decode("utf-8"))
+                    matches.append(
+                        cast(bytes, ffi.string(matches_ptr[i])).decode("utf-8")
+                    )
                     i += 1
             finally:
                 # Free the allocated memory
@@ -75,7 +79,7 @@ def sub(self, replacement: str, text: str) -> str:
         if result:
             ptr = result
             try:
-                result_bytes: bytes = ffi.string(result)
+                result_bytes = cast(bytes, ffi.string(result))
                 return result_bytes.decode("utf-8")
             finally:
                 lib.free(ptr)