From 4ec7fdf24b2c51bf6c3b22979b30829f4d3b910a Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Wed, 25 Dec 2019 00:52:47 +0900
Subject: [PATCH] Migrate to py3 style type annotation: sphinx.search

---
 sphinx/search/__init__.py | 85 ++++++++++++++-------------------------
 sphinx/search/da.py       | 12 ++----
 sphinx/search/de.py       | 12 ++----
 sphinx/search/en.py       | 12 ++----
 sphinx/search/es.py       | 12 ++----
 sphinx/search/fi.py       | 12 ++----
 sphinx/search/fr.py       | 12 ++----
 sphinx/search/hu.py       | 12 ++----
 sphinx/search/it.py       | 12 ++----
 sphinx/search/ja.py       | 58 +++++++++-----------------
 sphinx/search/nl.py       | 12 ++----
 sphinx/search/no.py       | 12 ++----
 sphinx/search/pt.py       | 12 ++----
 sphinx/search/ro.py       | 13 +++---
 sphinx/search/ru.py       | 12 ++----
 sphinx/search/sv.py       | 13 +++---
 sphinx/search/tr.py       | 13 +++---
 sphinx/search/zh.py       | 18 +++------
 18 files changed, 116 insertions(+), 228 deletions(-)

diff --git a/sphinx/search/__init__.py b/sphinx/search/__init__.py
index 22ba14d40..54a1aad92 100644
--- a/sphinx/search/__init__.py
+++ b/sphinx/search/__init__.py
@@ -13,21 +13,21 @@ import re
 import warnings
 from importlib import import_module
 from os import path
+from typing import Any, Dict, IO, Iterable, List, Tuple, Set
 
 from docutils import nodes
+from docutils.nodes import Node
 
 from sphinx import addnodes
 from sphinx import package_dir
 from sphinx.deprecation import RemovedInSphinx40Warning
+from sphinx.environment import BuildEnvironment
 from sphinx.search.jssplitter import splitter_code
 from sphinx.util import jsdump, rpartition
 
 if False:
     # For type annotation
-    from typing import Any, Dict, IO, Iterable, List, Tuple, Set  # NOQA
     from typing import Type  # for python3.5.1
-    from docutils import nodes  # NOQA
-    from sphinx.environment import BuildEnvironment  # NOQA
 
 
 class SearchLanguage:
@@ -69,19 +69,16 @@ var Stemmer = function() {
 
     _word_re = re.compile(r'(?u)\w+')
 
-    def __init__(self, options):
-        # type: (Dict) -> None
+    def __init__(self, options: Dict) -> None:
         self.options = options
         self.init(options)
 
-    def init(self, options):
-        # type: (Dict) -> None
+    def init(self, options: Dict) -> None:
         """
         Initialize the class with the options the user has given.
         """
 
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         """
         This method splits a sentence into words.  Default splitter splits input
         at white spaces, which should be enough for most languages except CJK
@@ -89,8 +86,7 @@ var Stemmer = function() {
         """
         return self._word_re.findall(input)
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         """
         This method implements stemming algorithm of the Python version.
 
@@ -103,8 +99,7 @@ var Stemmer = function() {
         """
         return word
 
-    def word_filter(self, word):
-        # type: (str) -> bool
+    def word_filter(self, word: str) -> bool:
         """
         Return true if the target word should be registered in the search index.
         This method is called after stemming.
@@ -121,8 +116,7 @@ var Stemmer = function() {
 from sphinx.search.en import SearchEnglish
 
 
-def parse_stop_word(source):
-    # type: (str) -> Set[str]
+def parse_stop_word(source: str) -> Set[str]:
     """
     parse snowball style word list like this:
 
@@ -166,24 +160,20 @@ class _JavaScriptIndex:
     PREFIX = 'Search.setIndex('
     SUFFIX = ')'
 
-    def dumps(self, data):
-        # type: (Any) -> str
+    def dumps(self, data: Any) -> str:
         return self.PREFIX + jsdump.dumps(data) + self.SUFFIX
 
-    def loads(self, s):
-        # type: (str) -> Any
+    def loads(self, s: str) -> Any:
         data = s[len(self.PREFIX):-len(self.SUFFIX)]
         if not data or not s.startswith(self.PREFIX) or not \
            s.endswith(self.SUFFIX):
             raise ValueError('invalid data')
         return jsdump.loads(data)
 
-    def dump(self, data, f):
-        # type: (Any, IO) -> None
+    def dump(self, data: Any, f: IO) -> None:
         f.write(self.dumps(data))
 
-    def load(self, f):
-        # type: (IO) -> Any
+    def load(self, f: IO) -> Any:
         return self.loads(f.read())
 
 
@@ -195,15 +185,13 @@ class WordCollector(nodes.NodeVisitor):
     A special visitor that collects words for the `IndexBuilder`.
     """
 
-    def __init__(self, document, lang):
-        # type: (nodes.document, SearchLanguage) -> None
+    def __init__(self, document: nodes.document, lang: SearchLanguage) -> None:
         super().__init__(document)
         self.found_words = []           # type: List[str]
         self.found_title_words = []     # type: List[str]
         self.lang = lang
 
-    def is_meta_keywords(self, node, nodetype=None):
-        # type: (addnodes.meta, Any) -> bool
+    def is_meta_keywords(self, node: addnodes.meta, nodetype: Any = None) -> bool:
         if nodetype is not None:
             warnings.warn('"nodetype" argument for WordCollector.is_meta_keywords() '
                           'is deprecated.', RemovedInSphinx40Warning)
@@ -217,8 +205,7 @@ class WordCollector(nodes.NodeVisitor):
 
         return False
 
-    def dispatch_visit(self, node):
-        # type: (nodes.Node) -> None
+    def dispatch_visit(self, node: Node) -> None:
         if isinstance(node, nodes.comment):
             raise nodes.SkipNode
         elif isinstance(node, nodes.raw):
@@ -251,8 +238,7 @@ class IndexBuilder:
         'pickle':   pickle
     }
 
-    def __init__(self, env, lang, options, scoring):
-        # type: (BuildEnvironment, str, Dict, str) -> None
+    def __init__(self, env: BuildEnvironment, lang: str, options: Dict, scoring: str) -> None:
         self.env = env
         self._titles = {}           # type: Dict[str, str]
                                     # docname -> title
@@ -292,8 +278,7 @@ class IndexBuilder:
             self.js_scorer_code = ''
         self.js_splitter_code = splitter_code
 
-    def load(self, stream, format):
-        # type: (IO, Any) -> None
+    def load(self, stream: IO, format: Any) -> None:
         """Reconstruct from frozen data."""
         if isinstance(format, str):
             format = self.formats[format]
@@ -306,8 +291,7 @@ class IndexBuilder:
         self._filenames = dict(zip(index2fn, frozen['filenames']))
         self._titles = dict(zip(index2fn, frozen['titles']))
 
-        def load_terms(mapping):
-            # type: (Dict[str, Any]) -> Dict[str, Set[str]]
+        def load_terms(mapping: Dict[str, Any]) -> Dict[str, Set[str]]:
             rv = {}
             for k, v in mapping.items():
                 if isinstance(v, int):
@@ -320,15 +304,14 @@ class IndexBuilder:
         self._title_mapping = load_terms(frozen['titleterms'])
         # no need to load keywords/objtypes
 
-    def dump(self, stream, format):
-        # type: (IO, Any) -> None
+    def dump(self, stream: IO, format: Any) -> None:
         """Dump the frozen index to a stream."""
         if isinstance(format, str):
             format = self.formats[format]
         format.dump(self.freeze(), stream)
 
-    def get_objects(self, fn2index):
-        # type: (Dict[str, int]) -> Dict[str, Dict[str, Tuple[int, int, int, str]]]
+    def get_objects(self, fn2index: Dict[str, int]
+                    ) -> Dict[str, Dict[str, Tuple[int, int, int, str]]]:
         rv = {}  # type: Dict[str, Dict[str, Tuple[int, int, int, str]]]
         otypes = self._objtypes
         onames = self._objnames
@@ -364,8 +347,7 @@ class IndexBuilder:
                 pdict[name] = (fn2index[docname], typeindex, prio, shortanchor)
         return rv
 
-    def get_terms(self, fn2index):
-        # type: (Dict) -> Tuple[Dict[str, List[str]], Dict[str, List[str]]]
+    def get_terms(self, fn2index: Dict) -> Tuple[Dict[str, List[str]], Dict[str, List[str]]]:
         rvs = {}, {}  # type: Tuple[Dict[str, List[str]], Dict[str, List[str]]]
         for rv, mapping in zip(rvs, (self._mapping, self._title_mapping)):
             for k, v in mapping.items():
@@ -377,8 +359,7 @@ class IndexBuilder:
                     rv[k] = sorted([fn2index[fn] for fn in v if fn in fn2index])
         return rvs
 
-    def freeze(self):
-        # type: () -> Dict[str, Any]
+    def freeze(self) -> Dict[str, Any]:
         """Create a usable data structure for serializing."""
         docnames, titles = zip(*sorted(self._titles.items()))
         filenames = [self._filenames.get(docname) for docname in docnames]
@@ -392,12 +373,10 @@ class IndexBuilder:
                     objects=objects, objtypes=objtypes, objnames=objnames,
                     titleterms=title_terms, envversion=self.env.version)
 
-    def label(self):
-        # type: () -> str
+    def label(self) -> str:
         return "%s (code: %s)" % (self.lang.language_name, self.lang.lang)
 
-    def prune(self, docnames):
-        # type: (Iterable[str]) -> None
+    def prune(self, docnames: Iterable[str]) -> None:
         """Remove data for all docnames not in the list."""
         new_titles = {}
         new_filenames = {}
@@ -412,8 +391,7 @@ class IndexBuilder:
         for wordnames in self._title_mapping.values():
             wordnames.intersection_update(docnames)
 
-    def feed(self, docname, filename, title, doctree):
-        # type: (str, str, str, nodes.document) -> None
+    def feed(self, docname: str, filename: str, title: str, doctree: nodes.document) -> None:
         """Feed a doctree to the index."""
         self._titles[docname] = title
         self._filenames[docname] = filename
@@ -422,8 +400,7 @@ class IndexBuilder:
         doctree.walk(visitor)
 
         # memoize self.lang.stem
-        def stem(word):
-            # type: (str) -> str
+        def stem(word: str) -> str:
             try:
                 return self._stem_cache[word]
             except KeyError:
@@ -447,8 +424,7 @@ class IndexBuilder:
             if _filter(stemmed_word) and not already_indexed:
                 self._mapping.setdefault(stemmed_word, set()).add(docname)
 
-    def context_for_searchtool(self):
-        # type: () -> Dict[str, Any]
+    def context_for_searchtool(self) -> Dict[str, Any]:
         return {
             'search_language_stemming_code': self.lang.js_stemmer_code,
             'search_language_stop_words': jsdump.dumps(sorted(self.lang.stopwords)),
@@ -456,8 +432,7 @@ class IndexBuilder:
             'search_word_splitter_code': self.js_splitter_code,
         }
 
-    def get_js_stemmer_rawcode(self):
-        # type: () -> str
+    def get_js_stemmer_rawcode(self) -> str:
         if self.lang.js_stemmer_rawcode:
             return path.join(package_dir, 'search', 'non-minified-js',
                              self.lang.js_stemmer_rawcode)
diff --git a/sphinx/search/da.py b/sphinx/search/da.py
index 228fdf086..b04679e10 100644
--- a/sphinx/search/da.py
+++ b/sphinx/search/da.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 danish_stopwords = parse_stop_word('''
@@ -128,10 +126,8 @@ class SearchDanish(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = danish_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('danish')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/de.py b/sphinx/search/de.py
index 5413e0732..ae1827bf9 100644
--- a/sphinx/search/de.py
+++ b/sphinx/search/de.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 german_stopwords = parse_stop_word('''
@@ -311,10 +309,8 @@ class SearchGerman(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = german_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('german')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/en.py b/sphinx/search/en.py
index fa8e1f66b..1fabef78d 100644
--- a/sphinx/search/en.py
+++ b/sphinx/search/en.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
+from typing import Dict
+
 from sphinx.search import SearchLanguage
 from sphinx.util.stemmer import get_stemmer
 
-if False:
-    # For type annotation
-    from typing import Dict  # NOQA
-
 english_stopwords = set("""
 a  and  are  as  at
 be  but  by
@@ -220,10 +218,8 @@ class SearchEnglish(SearchLanguage):
     js_stemmer_code = js_porter_stemmer
     stopwords = english_stopwords
 
-    def init(self, options):
-        # type: (Dict) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = get_stemmer()
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stem(word.lower())
diff --git a/sphinx/search/es.py b/sphinx/search/es.py
index c6f0dae9c..1009961c8 100644
--- a/sphinx/search/es.py
+++ b/sphinx/search/es.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 spanish_stopwords = parse_stop_word('''
@@ -371,10 +369,8 @@ class SearchSpanish(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = spanish_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('spanish')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/fi.py b/sphinx/search/fi.py
index b8ff1d1f8..67bee89fe 100644
--- a/sphinx/search/fi.py
+++ b/sphinx/search/fi.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 finnish_stopwords = parse_stop_word('''
@@ -121,10 +119,8 @@ class SearchFinnish(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = finnish_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('finnish')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/fr.py b/sphinx/search/fr.py
index 0848843f3..b15271888 100644
--- a/sphinx/search/fr.py
+++ b/sphinx/search/fr.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 french_stopwords = parse_stop_word('''
@@ -207,10 +205,8 @@ class SearchFrench(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = french_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('french')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/hu.py b/sphinx/search/hu.py
index 973475cb3..085773383 100644
--- a/sphinx/search/hu.py
+++ b/sphinx/search/hu.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 hungarian_stopwords = parse_stop_word('''
@@ -235,10 +233,8 @@ class SearchHungarian(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = hungarian_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('hungarian')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/it.py b/sphinx/search/it.py
index 41039818b..e76cd99dd 100644
--- a/sphinx/search/it.py
+++ b/sphinx/search/it.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 italian_stopwords = parse_stop_word('''
@@ -324,10 +322,8 @@ class SearchItalian(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = italian_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('italian')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/ja.py b/sphinx/search/ja.py
index 0c11af74d..a7b9f9684 100644
--- a/sphinx/search/ja.py
+++ b/sphinx/search/ja.py
@@ -20,6 +20,7 @@ import os
 import re
 import sys
 import warnings
+from typing import Any, Dict, List
 
 try:
     import MeCab
@@ -38,21 +39,13 @@ from sphinx.errors import SphinxError, ExtensionError
 from sphinx.search import SearchLanguage
 from sphinx.util import import_object
 
-if False:
-    # For type annotation
-    from typing import Any, Dict, List  # NOQA
-
 
 class BaseSplitter:
-
-    def __init__(self, options):
-        # type: (Dict) -> None
+    def __init__(self, options: Dict) -> None:
         self.options = options
 
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         """
-
         :param str input:
         :return:
         :rtype: list[str]
@@ -61,8 +54,7 @@ class BaseSplitter:
 
 
 class MecabSplitter(BaseSplitter):
-    def __init__(self, options):
-        # type: (Dict) -> None
+    def __init__(self, options: Dict) -> None:
         super().__init__(options)
         self.ctypes_libmecab = None     # type: Any
         self.ctypes_mecab = None        # type: Any
@@ -72,8 +64,7 @@ class MecabSplitter(BaseSplitter):
             self.init_native(options)
         self.dict_encode = options.get('dic_enc', 'utf-8')
 
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         if native_module:
             result = self.native.parse(input)
         else:
@@ -81,16 +72,14 @@ class MecabSplitter(BaseSplitter):
                 self.ctypes_mecab, input.encode(self.dict_encode))
         return result.split(' ')
 
-    def init_native(self, options):
-        # type: (Dict) -> None
+    def init_native(self, options: Dict) -> None:
         param = '-Owakati'
         dict = options.get('dict')
         if dict:
             param += ' -d %s' % dict
         self.native = MeCab.Tagger(param)
 
-    def init_ctypes(self, options):
-        # type: (Dict) -> None
+    def init_ctypes(self, options: Dict) -> None:
         import ctypes.util
 
         lib = options.get('lib')
@@ -126,8 +115,7 @@ class MecabSplitter(BaseSplitter):
         if self.ctypes_mecab is None:
             raise SphinxError('mecab initialization failed')
 
-    def __del__(self):
-        # type: () -> None
+    def __del__(self) -> None:
         if self.ctypes_libmecab:
             self.ctypes_libmecab.mecab_destroy(self.ctypes_mecab)
 
@@ -135,21 +123,18 @@ MeCabBinder = MecabSplitter  # keep backward compatibility until Sphinx-1.6
 
 
 class JanomeSplitter(BaseSplitter):
-    def __init__(self, options):
-        # type: (Dict) -> None
+    def __init__(self, options: Dict) -> None:
         super().__init__(options)
         self.user_dict = options.get('user_dic')
         self.user_dict_enc = options.get('user_dic_enc', 'utf8')
         self.init_tokenizer()
 
-    def init_tokenizer(self):
-        # type: () -> None
+    def init_tokenizer(self) -> None:
         if not janome_module:
             raise RuntimeError('Janome is not available')
         self.tokenizer = janome.tokenizer.Tokenizer(udic=self.user_dict, udic_enc=self.user_dict_enc)
 
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         result = ' '.join(token.surface for token in self.tokenizer.tokenize(input))
         return result.split(' ')
 
@@ -425,23 +410,20 @@ class DefaultSplitter(BaseSplitter):
              '郎': 1082, '１': -270, 'Ｅ１': 306, 'ﾙ': -673, 'ﾝ': -496}
 
     # ctype_
-    def ctype_(self, char):
-        # type: (str) -> str
+    def ctype_(self, char: str) -> str:
         for pattern, value in self.patterns_.items():
             if pattern.match(char):
                 return value
         return 'O'
 
     # ts_
-    def ts_(self, dict, key):
-        # type: (Dict[str, int], str) -> int
+    def ts_(self, dict: Dict[str, int], key: str) -> int:
         if key in dict:
             return dict[key]
         return 0
 
     # segment
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         if not input:
             return []
 
@@ -549,8 +531,7 @@ class SearchJapanese(SearchLanguage):
         'janome': 'sphinx.search.ja.JanomeSplitter',
     }
 
-    def init(self, options):
-        # type: (Dict) -> None
+    def init(self, options: Dict) -> None:
         type = options.get('type', 'sphinx.search.ja.DefaultSplitter')
         if type in self.splitters:
             dotted_path = self.splitters[type]
@@ -565,14 +546,11 @@ class SearchJapanese(SearchLanguage):
             raise ExtensionError("Splitter module %r can't be imported" %
                                  dotted_path)
 
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         return self.splitter.split(input)
 
-    def word_filter(self, stemmed_word):
-        # type: (str) -> bool
+    def word_filter(self, stemmed_word: str) -> bool:
         return len(stemmed_word) > 1
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return word
diff --git a/sphinx/search/nl.py b/sphinx/search/nl.py
index 076c190b2..0e2e2ef23 100644
--- a/sphinx/search/nl.py
+++ b/sphinx/search/nl.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 dutch_stopwords = parse_stop_word('''
@@ -135,10 +133,8 @@ class SearchDutch(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = dutch_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('dutch')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/no.py b/sphinx/search/no.py
index 106c6b670..68c1ac207 100644
--- a/sphinx/search/no.py
+++ b/sphinx/search/no.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 norwegian_stopwords = parse_stop_word('''
@@ -210,10 +208,8 @@ class SearchNorwegian(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = norwegian_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('norwegian')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/pt.py b/sphinx/search/pt.py
index 143759387..2538511f7 100644
--- a/sphinx/search/pt.py
+++ b/sphinx/search/pt.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 portuguese_stopwords = parse_stop_word('''
@@ -270,10 +268,8 @@ class SearchPortuguese(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = portuguese_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('portuguese')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/ro.py b/sphinx/search/ro.py
index e385d6f01..cfae772c9 100644
--- a/sphinx/search/ro.py
+++ b/sphinx/search/ro.py
@@ -8,13 +8,12 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage
+from typing import Dict, Set
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Dict, Set  # NOQA
+from sphinx.search import SearchLanguage
+
 
 js_stemmer = """
 var JSX={};(function(j){function l(b,e){var a=function(){};a.prototype=e.prototype;var c=new a;for(var d in b){b[d].prototype=c}}function L(c,b){for(var a in b.prototype)if(b.prototype.hasOwnProperty(a))c.prototype[a]=b.prototype[a]}function h(a,b,d){function c(a,b,c){delete a[b];a[b]=c;return c}Object.defineProperty(a,b,{get:function(){return c(a,b,d())},set:function(d){c(a,b,d)},enumerable:true,configurable:true})}function M(a,b,c){return a[b]=a[b]/c|0}var E=parseInt;var C=parseFloat;function N(a){return a!==a}var A=isFinite;var z=encodeURIComponent;var y=decodeURIComponent;var x=encodeURI;var w=decodeURI;var u=Object.prototype.toString;var D=Object.prototype.hasOwnProperty;function k(){}j.require=function(b){var a=r[b];return a!==undefined?a:null};j.profilerIsRunning=function(){return k.getResults!=null};j.getProfileResults=function(){return(k.getResults||function(){return{}})()};j.postProfileResults=function(a,b){if(k.postResults==null)throw new Error('profiler has not been turned 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true}b-=c;if((d[b>>>3]&1<<(b&7))===0){a._--;return true}return false};function m(a,b,d){var c;if(a.A-a._<b){return false}if(a.E.slice(c=a._,c+b)!==d){return false}a._+=b;return true};function i(a,b,d){var c;if(a._-a.D<b){return false}if(a.E.slice((c=a._)-b,c)!==d){return false}a._-=b;return true};function q(f,m,p){var b;var d;var e;var n;var g;var k;var l;var i;var h;var c;var a;var j;var o;b=0;d=p;e=f._;n=f.A;g=0;k=0;l=false;while(true){i=b+(d-b>>>1);h=0;c=g<k?g:k;a=m[i];for(j=c;j<a.F;j++){if(e+c===n){h=-1;break}h=f.E.charCodeAt(e+c)-a.K.charCodeAt(j);if(h!==0){break}c++}if(h<0){d=i;k=c}else{b=i;g=c}if(d-b<=1){if(b>0){break}if(d===b){break}if(l){break}l=true}}while(true){a=m[b];if(g>=a.F){f._=e+a.F|0;if(a.H==null){return a.I}o=a.H(a.P);f._=e+a.F|0;if(o){return a.I}}b=a.L;if(b<0){return 0}}return-1};function f(d,m,p){var b;var g;var e;var n;var f;var k;var l;var i;var h;var c;var a;var j;var o;b=0;g=p;e=d._;n=d.D;f=0;k=0;l=false;while(true){i=b+(g-b>>1);h=0;c=f<k?f:k;a=m[i];for(j=a.F-1-c;j>=0;j--){if(e-c===n){h=-1;break}h=d.E.charCodeAt(e-1-c)-a.K.charCodeAt(j);if(h!==0){break}c++}if(h<0){g=i;k=c}else{b=i;f=c}if(g-b<=1){if(b>0){break}if(g===b){break}if(l){break}l=true}}while(true){a=m[b];if(f>=a.F){d._=e-a.F|0;if(a.H==null){return a.I}o=a.H(d);d._=e-a.F|0;if(o){return a.I}}b=a.L;if(b<0){return 0}}return-1};function s(a,b,d,e){var c;c=e.length-(d-b);a.E=a.E.slice(0,b)+e+a.E.slice(d);a.A+=c|0;if(a._>=d){a._+=c|0}else if(a._>b){a._=b}return c|0};function c(a,f){var b;var c;var d;var e;b=false;if((c=a.B)<0||c>(d=a.C)||d>(e=a.A)||e>a.E.length?false:true){s(a,a.B,a.C,f);b=true}return b};g.prototype.J=function(){return false};g.prototype.b=function(b){var a;var c;var d;var e;a=this.G['.'+b];if(a==null){c=this.E=b;d=this._=0;e=this.A=c.length;this.D=0;this.B=d;this.C=e;this.J();a=this.E;this.G['.'+b]=a}return a};g.prototype.stemWord=g.prototype.b;g.prototype.c=function(e){var d;var b;var c;var a;var f;var g;var h;d=[];for(b=0;b<e.length;b++){c=e[b];a=this.G['.'+c];if(a==null){f=this.E=c;g=this._=0;h=this.A=f.length;this.D=0;this.B=g;this.C=h;this.J();a=this.E;this.G['.'+c]=a}d.push(a)}return d};g.prototype.stemWords=g.prototype.c;function b(){g.call(this);this.B_standard_suffix_removed=false;this.I_p2=0;this.I_p1=0;this.I_pV=0};l([b],g);b.prototype.M=function(a){this.B_standard_suffix_removed=a.B_standard_suffix_removed;this.I_p2=a.I_p2;this.I_p1=a.I_p1;this.I_pV=a.I_pV;v(this,a)};b.prototype.copy_from=b.prototype.M;b.prototype.W=function(){var i;var a;var j;var e;var f;var g;var h;var k;b:while(true){i=this._;e=true;d:while(e===true){e=false;e:while(true){a=this._;f=true;a:while(f===true){f=false;if(!d(this,b.g_v,97,259)){break a}this.B=this._;g=true;f:while(g===true){g=false;j=this._;h=true;c:while(h===true){h=false;if(!m(this,1,'u')){break c}this.C=this._;if(!d(this,b.g_v,97,259)){break c}if(!c(this,'U')){return false}break 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h;a.C=a._;d=f(a,b.a_1,16);if(d===0){return false}a.B=h=a._;if(!(!(a.I_p1<=h)?false:true)){return false}switch(d){case 0:return false;case 1:if(!c(a,'')){return false}break;case 2:if(!c(a,'a')){return false}break;case 3:if(!c(a,'e')){return false}break;case 4:if(!c(a,'i')){return false}break;case 5:g=a.A-a._;e=true;a:while(e===true){e=false;if(!i(a,2,'ab')){break a}return false}a._=a.A-g;if(!c(a,'i')){return false}break;case 6:if(!c(a,'at')){return false}break;case 7:if(!c(a,'aţi')){return false}break}return true};b.prototype.T=function(){var a;var d;var e;var g;d=this.A-(e=this._);this.C=e;a=f(this,b.a_2,46);if(a===0){return false}this.B=g=this._;if(!(!(this.I_p1<=g)?false:true)){return false}switch(a){case 0:return false;case 1:if(!c(this,'abil')){return false}break;case 2:if(!c(this,'ibil')){return false}break;case 3:if(!c(this,'iv')){return false}break;case 4:if(!c(this,'ic')){return false}break;case 5:if(!c(this,'at')){return false}break;case 6:if(!c(this,'it')){return false}break}this.B_standard_suffix_removed=true;this._=this.A-d;return true};b.prototype.r_combo_suffix=b.prototype.T;function o(a){var d;var e;var g;var h;e=a.A-(g=a._);a.C=g;d=f(a,b.a_2,46);if(d===0){return false}a.B=h=a._;if(!(!(a.I_p1<=h)?false:true)){return false}switch(d){case 0:return false;case 1:if(!c(a,'abil')){return false}break;case 2:if(!c(a,'ibil')){return false}break;case 3:if(!c(a,'iv')){return false}break;case 4:if(!c(a,'ic')){return false}break;case 5:if(!c(a,'at')){return false}break;case 6:if(!c(a,'it')){return false}break}a.B_standard_suffix_removed=true;a._=a.A-e;return true};b.prototype.X=function(){var a;var e;var d;var g;this.B_standard_suffix_removed=false;a:while(true){e=this.A-this._;d=true;b:while(d===true){d=false;if(!o(this)){break b}continue a}this._=this.A-e;break a}this.C=this._;a=f(this,b.a_3,62);if(a===0){return false}this.B=g=this._;if(!(!(this.I_p2<=g)?false:true)){return false}switch(a){case 0:return false;case 1:if(!c(this,'')){return false}break;case 2:if(!i(this,1,'ţ')){return false}this.B=this._;if(!c(this,'t')){return false}break;case 3:if(!c(this,'ist')){return false}break}this.B_standard_suffix_removed=true;return true};b.prototype.r_standard_suffix=b.prototype.X;function K(a){var d;var g;var e;var h;a.B_standard_suffix_removed=false;a:while(true){g=a.A-a._;e=true;b:while(e===true){e=false;if(!o(a)){break b}continue a}a._=a.A-g;break a}a.C=a._;d=f(a,b.a_3,62);if(d===0){return false}a.B=h=a._;if(!(!(a.I_p2<=h)?false:true)){return false}switch(d){case 0:return false;case 1:if(!c(a,'')){return false}break;case 2:if(!i(a,1,'ţ')){return false}a.B=a._;if(!c(a,'t')){return false}break;case 3:if(!c(a,'ist')){return false}break}a.B_standard_suffix_removed=true;return true};b.prototype.Z=function(){var d;var h;var a;var j;var e;var g;var k;var l;var m;h=this.A-(k=this._);if(k<this.I_pV){return false}l=this._=this.I_pV;a=this.D;this.D=l;m=this._=this.A-h;this.C=m;d=f(this,b.a_4,94);if(d===0){this.D=a;return false}this.B=this._;switch(d){case 0:this.D=a;return false;case 1:e=true;a:while(e===true){e=false;j=this.A-this._;g=true;b:while(g===true){g=false;if(!p(this,b.g_v,97,259)){break b}break a}this._=this.A-j;if(!i(this,1,'u')){this.D=a;return false}}if(!c(this,'')){return false}break;case 2:if(!c(this,'')){return false}break}this.D=a;return true};b.prototype.r_verb_suffix=b.prototype.Z;function F(a){var e;var l;var d;var j;var g;var h;var m;var n;var k;l=a.A-(m=a._);if(m<a.I_pV){return false}n=a._=a.I_pV;d=a.D;a.D=n;k=a._=a.A-l;a.C=k;e=f(a,b.a_4,94);if(e===0){a.D=d;return false}a.B=a._;switch(e){case 0:a.D=d;return false;case 1:g=true;a:while(g===true){g=false;j=a.A-a._;h=true;b:while(h===true){h=false;if(!p(a,b.g_v,97,259)){break b}break a}a._=a.A-j;if(!i(a,1,'u')){a.D=d;return false}}if(!c(a,'')){return false}break;case 2:if(!c(a,'')){return false}break}a.D=d;return true};b.prototype.a=function(){var a;var d;this.C=this._;a=f(this,b.a_5,5);if(a===0){return false}this.B=d=this._;if(!(!(this.I_pV<=d)?false:true)){return false}switch(a){case 0:return false;case 1:if(!c(this,'')){return false}break}return true};b.prototype.r_vowel_suffix=b.prototype.a;function B(a){var d;var e;a.C=a._;d=f(a,b.a_5,5);if(d===0){return false}a.B=e=a._;if(!(!(a.I_pV<=e)?false:true)){return false}switch(d){case 0:return false;case 1:if(!c(a,'')){return false}break}return true};b.prototype.J=function(){var n;var j;var k;var l;var m;var o;var p;var b;var c;var d;var e;var f;var a;var g;var h;var i;var r;var s;var t;var u;var v;var w;var x;var y;var q;n=this._;b=true;a:while(b===true){b=false;if(!G(this)){break a}}r=this._=n;j=r;c=true;a:while(c===true){c=false;if(!H(this)){break a}}s=this._=j;this.D=s;u=this._=t=this.A;k=t-u;d=true;a:while(d===true){d=false;if(!J(this)){break a}}w=this._=(v=this.A)-k;l=v-w;e=true;a:while(e===true){e=false;if(!K(this)){break a}}y=this._=(x=this.A)-l;m=x-y;f=true;a:while(f===true){f=false;a=true;b:while(a===true){a=false;o=this.A-this._;g=true;c:while(g===true){g=false;if(!this.B_standard_suffix_removed){break c}break b}this._=this.A-o;if(!F(this)){break a}}}this._=this.A-m;h=true;a:while(h===true){h=false;if(!B(this)){break a}}q=this._=this.D;p=q;i=true;a:while(i===true){i=false;if(!I(this)){break a}}this._=p;return true};b.prototype.stem=b.prototype.J;b.prototype.N=function(a){return a instanceof b};b.prototype.equals=b.prototype.N;b.prototype.O=function(){var c;var a;var b;var d;c='RomanianStemmer';a=0;for(b=0;b<c.length;b++){d=c.charCodeAt(b);a=(a<<5)-a+d;a=a&a}return a|0};b.prototype.hashCode=b.prototype.O;b.serialVersionUID=1;h(b,'methodObject',function(){return new b});h(b,'a_0',function(){return[new a('',-1,3),new a('I',0,1),new a('U',0,2)]});h(b,'a_1',function(){return[new a('ea',-1,3),new a('aţia',-1,7),new a('aua',-1,2),new a('iua',-1,4),new a('aţie',-1,7),new a('ele',-1,3),new a('ile',-1,5),new a('iile',6,4),new a('iei',-1,4),new a('atei',-1,6),new a('ii',-1,4),new a('ului',-1,1),new a('ul',-1,1),new a('elor',-1,3),new a('ilor',-1,4),new a('iilor',14,4)]});h(b,'a_2',function(){return[new a('icala',-1,4),new a('iciva',-1,4),new a('ativa',-1,5),new a('itiva',-1,6),new a('icale',-1,4),new a('aţiune',-1,5),new a('iţiune',-1,6),new a('atoare',-1,5),new a('itoare',-1,6),new a('ătoare',-1,5),new a('icitate',-1,4),new a('abilitate',-1,1),new a('ibilitate',-1,2),new a('ivitate',-1,3),new a('icive',-1,4),new a('ative',-1,5),new a('itive',-1,6),new a('icali',-1,4),new a('atori',-1,5),new a('icatori',18,4),new a('itori',-1,6),new a('ători',-1,5),new a('icitati',-1,4),new a('abilitati',-1,1),new a('ivitati',-1,3),new a('icivi',-1,4),new a('ativi',-1,5),new a('itivi',-1,6),new a('icităi',-1,4),new a('abilităi',-1,1),new a('ivităi',-1,3),new a('icităţi',-1,4),new a('abilităţi',-1,1),new a('ivităţi',-1,3),new a('ical',-1,4),new a('ator',-1,5),new a('icator',35,4),new a('itor',-1,6),new a('ător',-1,5),new a('iciv',-1,4),new a('ativ',-1,5),new a('itiv',-1,6),new a('icală',-1,4),new a('icivă',-1,4),new a('ativă',-1,5),new a('itivă',-1,6)]});h(b,'a_3',function(){return[new a('ica',-1,1),new a('abila',-1,1),new a('ibila',-1,1),new a('oasa',-1,1),new a('ata',-1,1),new a('ita',-1,1),new a('anta',-1,1),new a('ista',-1,3),new a('uta',-1,1),new a('iva',-1,1),new a('ic',-1,1),new a('ice',-1,1),new a('abile',-1,1),new a('ibile',-1,1),new a('isme',-1,3),new a('iune',-1,2),new a('oase',-1,1),new a('ate',-1,1),new a('itate',17,1),new a('ite',-1,1),new a('ante',-1,1),new a('iste',-1,3),new a('ute',-1,1),new a('ive',-1,1),new a('ici',-1,1),new a('abili',-1,1),new a('ibili',-1,1),new a('iuni',-1,2),new a('atori',-1,1),new a('osi',-1,1),new a('ati',-1,1),new a('itati',30,1),new a('iti',-1,1),new a('anti',-1,1),new a('isti',-1,3),new a('uti',-1,1),new a('işti',-1,3),new a('ivi',-1,1),new a('ităi',-1,1),new a('oşi',-1,1),new a('ităţi',-1,1),new a('abil',-1,1),new a('ibil',-1,1),new a('ism',-1,3),new a('ator',-1,1),new a('os',-1,1),new a('at',-1,1),new a('it',-1,1),new a('ant',-1,1),new a('ist',-1,3),new a('ut',-1,1),new a('iv',-1,1),new a('ică',-1,1),new a('abilă',-1,1),new a('ibilă',-1,1),new a('oasă',-1,1),new a('ată',-1,1),new a('ită',-1,1),new a('antă',-1,1),new a('istă',-1,3),new a('ută',-1,1),new a('ivă',-1,1)]});h(b,'a_4',function(){return[new a('ea',-1,1),new a('ia',-1,1),new a('esc',-1,1),new a('ăsc',-1,1),new a('ind',-1,1),new a('ând',-1,1),new a('are',-1,1),new a('ere',-1,1),new a('ire',-1,1),new a('âre',-1,1),new a('se',-1,2),new a('ase',10,1),new a('sese',10,2),new a('ise',10,1),new a('use',10,1),new a('âse',10,1),new a('eşte',-1,1),new a('ăşte',-1,1),new a('eze',-1,1),new a('ai',-1,1),new a('eai',19,1),new a('iai',19,1),new a('sei',-1,2),new a('eşti',-1,1),new a('ăşti',-1,1),new a('ui',-1,1),new a('ezi',-1,1),new a('âi',-1,1),new a('aşi',-1,1),new a('seşi',-1,2),new a('aseşi',29,1),new a('seseşi',29,2),new a('iseşi',29,1),new a('useşi',29,1),new a('âseşi',29,1),new a('işi',-1,1),new a('uşi',-1,1),new a('âşi',-1,1),new a('aţi',-1,2),new a('eaţi',38,1),new a('iaţi',38,1),new a('eţi',-1,2),new a('iţi',-1,2),new a('âţi',-1,2),new a('arăţi',-1,1),new a('serăţi',-1,2),new a('aserăţi',45,1),new a('seserăţi',45,2),new a('iserăţi',45,1),new a('userăţi',45,1),new a('âserăţi',45,1),new a('irăţi',-1,1),new a('urăţi',-1,1),new a('ârăţi',-1,1),new a('am',-1,1),new a('eam',54,1),new a('iam',54,1),new a('em',-1,2),new a('asem',57,1),new a('sesem',57,2),new a('isem',57,1),new a('usem',57,1),new a('âsem',57,1),new a('im',-1,2),new a('âm',-1,2),new a('ăm',-1,2),new a('arăm',65,1),new a('serăm',65,2),new a('aserăm',67,1),new a('seserăm',67,2),new a('iserăm',67,1),new a('userăm',67,1),new a('âserăm',67,1),new a('irăm',65,1),new a('urăm',65,1),new a('ârăm',65,1),new a('au',-1,1),new a('eau',76,1),new a('iau',76,1),new a('indu',-1,1),new a('ându',-1,1),new a('ez',-1,1),new a('ească',-1,1),new a('ară',-1,1),new a('seră',-1,2),new a('aseră',84,1),new a('seseră',84,2),new a('iseră',84,1),new a('useră',84,1),new a('âseră',84,1),new a('iră',-1,1),new a('ură',-1,1),new a('âră',-1,1),new a('ează',-1,1)]});h(b,'a_5',function(){return[new a('a',-1,1),new a('e',-1,1),new a('ie',1,1),new a('i',-1,1),new a('ă',-1,1)]});h(b,'g_v',function(){return[17,65,16,0,0,0,0,0,0,0,0,0,0,0,0,0,2,32,0,0,4]});var r={'src/stemmer.jsx':{Stemmer:n},'src/romanian-stemmer.jsx':{RomanianStemmer:b}}}(JSX))
@@ -29,10 +28,8 @@ class SearchRomanian(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = set()  # type: Set[str]
 
-    def init(self, options):
-        # type: (Dict) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('romanian')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/ru.py b/sphinx/search/ru.py
index 8719ef1d2..9c0e30394 100644
--- a/sphinx/search/ru.py
+++ b/sphinx/search/ru.py
@@ -8,13 +8,11 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any  # NOQA
+from sphinx.search import SearchLanguage, parse_stop_word
 
 
 russian_stopwords = parse_stop_word('''
@@ -259,10 +257,8 @@ class SearchRussian(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = russian_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('russian')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/sv.py b/sphinx/search/sv.py
index cfdd15f92..4af7f7835 100644
--- a/sphinx/search/sv.py
+++ b/sphinx/search/sv.py
@@ -8,13 +8,12 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage, parse_stop_word
+from typing import Dict
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Any
+from sphinx.search import SearchLanguage, parse_stop_word
+
 
 swedish_stopwords = parse_stop_word('''
 | source: http://snowball.tartarus.org/algorithms/swedish/stop.txt
@@ -147,10 +146,8 @@ class SearchSwedish(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = swedish_stopwords
 
-    def init(self, options):
-        # type: (Any) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('swedish')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/tr.py b/sphinx/search/tr.py
index ba2cdf951..8db42f676 100644
--- a/sphinx/search/tr.py
+++ b/sphinx/search/tr.py
@@ -8,13 +8,12 @@
     :license: BSD, see LICENSE for details.
 """
 
-from sphinx.search import SearchLanguage
+from typing import Dict, Set
 
 import snowballstemmer
 
-if False:
-    # For type annotation
-    from typing import Dict, Set  # NOQA
+from sphinx.search import SearchLanguage
+
 
 js_stemmer = """
 var JSX={};(function(q){function r(b,e){var a=function(){};a.prototype=e.prototype;var c=new a;for(var d in b){b[d].prototype=c}}function Q(c,b){for(var a in b.prototype)if(b.prototype.hasOwnProperty(a))c.prototype[a]=b.prototype[a]}function j(a,b,d){function c(a,b,c){delete a[b];a[b]=c;return c}Object.defineProperty(a,b,{get:function(){return c(a,b,d())},set:function(d){c(a,b,d)},enumerable:true,configurable:true})}function R(a,b,c){return a[b]=a[b]/c|0}var M=parseInt;var K=parseFloat;function P(a){return a!==a}var A=isFinite;var G=encodeURIComponent;var F=decodeURIComponent;var E=encodeURI;var D=decodeURI;var C=Object.prototype.toString;var H=Object.prototype.hasOwnProperty;function p(){}q.require=function(b){var a=y[b];return a!==undefined?a:null};q.profilerIsRunning=function(){return p.getResults!=null};q.getProfileResults=function(){return(p.getResults||function(){return{}})()};q.postProfileResults=function(a,b){if(p.postResults==null)throw new Error('profiler has not been turned on');return p.postResults(a,b)};q.resetProfileResults=function(){if(p.resetResults==null)throw new Error('profiler has not been turned on');return p.resetResults()};q.DEBUG=false;function I(){};r([I],Error);function d(a,b,c){this.G=a.length;this.A_=a;this.D_=b;this.J=c;this.I=null;this.E_=null};r([d],Object);function u(){};r([u],Object);function m(){var a;var b;var c;this.F={};a=this.E='';b=this._=0;c=this.A=a.length;this.D=0;this.B=b;this.C=c};r([m],u);function B(a,b){a.E=b.E;a._=b._;a.A=b.A;a.D=b.D;a.B=b.B;a.C=b.C};function v(b,d,c,e){var a;if(b._>=b.A){return false}a=b.E.charCodeAt(b._);if(a>e||a<c){return false}a-=c;if((d[a>>>3]&1<<(a&7))===0){return false}b._++;return true};function f(b,d,c,e){var a;if(b._<=b.D){return false}a=b.E.charCodeAt(b._-1);if(a>e||a<c){return false}a-=c;if((d[a>>>3]&1<<(a&7))===0){return false}b._--;return true};function t(a,d,c,e){var b;if(a._<=a.D){return false}b=a.E.charCodeAt(a._-1);if(b>e||b<c){a._--;return true}b-=c;if((d[b>>>3]&1<<(b&7))===0){a._--;return true}return false};function s(a,b,d){var c;if(a.A-a._<b){return false}if(a.E.slice(c=a._,c+b)!==d){return false}a._+=b;return true};function g(a,b,d){var c;if(a._-a.D<b){return false}if(a.E.slice((c=a._)-b,c)!==d){return false}a._-=b;return true};function b(d,m,p){var b;var g;var e;var n;var f;var k;var l;var i;var h;var c;var a;var j;var o;b=0;g=p;e=d._;n=d.D;f=0;k=0;l=false;while(true){i=b+(g-b>>1);h=0;c=f<k?f:k;a=m[i];for(j=a.G-1-c;j>=0;j--){if(e-c===n){h=-1;break}h=d.E.charCodeAt(e-1-c)-a.A_.charCodeAt(j);if(h!==0){break}c++}if(h<0){g=i;k=c}else{b=i;f=c}if(g-b<=1){if(b>0){break}if(g===b){break}if(l){break}l=true}}while(true){a=m[b];if(f>=a.G){d._=e-a.G|0;if(a.I==null){return a.J}o=a.I(d);d._=e-a.G|0;if(o){return a.J}}b=a.D_;if(b<0){return 0}}return-1};function n(a,b,d,e){var c;c=e.length-(d-b);a.E=a.E.slice(0,b)+e+a.E.slice(d);a.A+=c|0;if(a._>=d){a._+=c|0}else if(a._>b){a._=b}return c|0};function e(a,f){var b;var c;var d;var e;b=false;if((c=a.B)<0||c>(d=a.C)||d>(e=a.A)||e>a.E.length?false:true){n(a,a.B,a.C,f);b=true}return b};m.prototype.H=function(){return false};m.prototype.B_=function(b){var a;var c;var d;var e;a=this.F['.'+b];if(a==null){c=this.E=b;d=this._=0;e=this.A=c.length;this.D=0;this.B=d;this.C=e;this.H();a=this.E;this.F['.'+b]=a}return a};m.prototype.stemWord=m.prototype.B_;m.prototype.C_=function(e){var d;var b;var c;var a;var f;var g;var h;d=[];for(b=0;b<e.length;b++){c=e[b];a=this.F['.'+c];if(a==null){f=this.E=c;g=this._=0;h=this.A=f.length;this.D=0;this.B=g;this.C=h;this.H();a=this.E;this.F['.'+c]=a}d.push(a)}return d};m.prototype.stemWords=m.prototype.C_;function a(){m.call(this);this.B_continue_stemming_noun_suffixes=false;this.I_strlen=0};r([a],m);a.prototype.K=function(a){this.B_continue_stemming_noun_suffixes=a.B_continue_stemming_noun_suffixes;this.I_strlen=a.I_strlen;B(this,a)};a.prototype.copy_from=a.prototype.K;a.prototype.O=function(){var E;var q;var b;var e;var h;var i;var j;var k;var l;var m;var n;var o;var p;var c;var r;var s;var t;var u;var d;var v;var w;var x;var y;var z;var A;var B;var C;var D;var G;var H;var I;var J;var K;var L;var M;var N;var F;E=this.A-this._;b:while(true){q=this.A-this._;o=true;a:while(o===true){o=false;if(!f(this,a.g_vowel,97,305)){break a}this._=this.A-q;break b}G=this._=this.A-q;if(G<=this.D){return false}this._--}p=true;a:while(p===true){p=false;b=this.A-this._;c=true;b:while(c===true){c=false;if(!g(this,1,'a')){break b}c:while(true){e=this.A-this._;r=true;d:while(r===true){r=false;if(!f(this,a.g_vowel1,97,305)){break d}this._=this.A-e;break c}H=this._=this.A-e;if(H<=this.D){break b}this._--}break a}this._=this.A-b;s=true;b:while(s===true){s=false;if(!g(this,1,'e')){break b}c:while(true){h=this.A-this._;t=true;d:while(t===true){t=false;if(!f(this,a.g_vowel2,101,252)){break d}this._=this.A-h;break c}I=this._=this.A-h;if(I<=this.D){break b}this._--}break a}this._=this.A-b;u=true;b:while(u===true){u=false;if(!g(this,1,'ı')){break 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false}this._--;if(!f(this,a.g_vowel,97,305)){return false}this._=this.A-j}return true};a.prototype.r_mark_suffix_with_optional_y_consonant=a.prototype.l;function h(b){var i;var m;var l;var j;var n;var k;var c;var e;var d;var o;var p;var q;var r;var h;c=true;b:while(c===true){c=false;i=b.A-b._;e=true;a:while(e===true){e=false;m=b.A-b._;if(!g(b,1,'y')){break a}o=b._=b.A-m;if(o<=b.D){break a}b._--;l=b.A-b._;if(!f(b,a.g_vowel,97,305)){break a}b._=b.A-l;break b}q=b._=(p=b.A)-i;j=p-q;d=true;a:while(d===true){d=false;n=b.A-b._;if(!g(b,1,'y')){break a}b._=b.A-n;return false}h=b._=(r=b.A)-j;k=r-h;if(h<=b.D){return false}b._--;if(!f(b,a.g_vowel,97,305)){return false}b._=b.A-k}return true};a.prototype.i=function(){var j;var g;var k;var h;var l;var i;var b;var e;var d;var m;var n;var o;var p;var c;b=true;b:while(b===true){b=false;j=this.A-this._;e=true;a:while(e===true){e=false;g=this.A-this._;if(!f(this,a.g_U,105,305)){break a}m=this._=this.A-g;if(m<=this.D){break 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true};a.prototype.e=function(){return b(this,a.a_0,10)===0?false:!k(this)?false:true};a.prototype.r_mark_possessives=a.prototype.e;a.prototype.f=function(){return!c(this)?false:!f(this,a.g_U,105,305)?false:!l(this)?false:true};a.prototype.r_mark_sU=a.prototype.f;a.prototype.W=function(){return b(this,a.a_1,2)===0?false:true};a.prototype.r_mark_lArI=a.prototype.W;a.prototype.o=function(){return!c(this)?false:!f(this,a.g_U,105,305)?false:!h(this)?false:true};a.prototype.r_mark_yU=a.prototype.o;a.prototype.Y=function(){return!c(this)?false:b(this,a.a_2,4)===0?false:true};a.prototype.r_mark_nU=a.prototype.Y;a.prototype.Z=function(){return!c(this)?false:b(this,a.a_3,4)===0?false:!o(this)?false:true};a.prototype.r_mark_nUn=a.prototype.Z;a.prototype.m=function(){return!c(this)?false:b(this,a.a_4,2)===0?false:!h(this)?false:true};a.prototype.r_mark_yA=a.prototype.m;a.prototype.X=function(){return!c(this)?false:b(this,a.a_5,2)===0?false:true};a.prototype.r_mark_nA=a.prototype.X;a.prototype.Q=function(){return!c(this)?false:b(this,a.a_6,4)===0?false:true};a.prototype.r_mark_DA=a.prototype.Q;a.prototype.c=function(){return!c(this)?false:b(this,a.a_7,2)===0?false:true};a.prototype.r_mark_ndA=a.prototype.c;a.prototype.R=function(){return!c(this)?false:b(this,a.a_8,4)===0?false:true};a.prototype.r_mark_DAn=a.prototype.R;a.prototype.d=function(){return!c(this)?false:b(this,a.a_9,2)===0?false:true};a.prototype.r_mark_ndAn=a.prototype.d;a.prototype.s=function(){return!c(this)?false:b(this,a.a_10,2)===0?false:!h(this)?false:true};a.prototype.r_mark_ylA=a.prototype.s;a.prototype.U=function(){return!g(this,2,'ki')?false:true};a.prototype.r_mark_ki=a.prototype.U;a.prototype.b=function(){return!c(this)?false:b(this,a.a_11,2)===0?false:!o(this)?false:true};a.prototype.r_mark_ncA=a.prototype.b;a.prototype.p=function(){return!c(this)?false:b(this,a.a_12,4)===0?false:!h(this)?false:true};a.prototype.r_mark_yUm=a.prototype.p;a.prototype.g=function(){return!c(this)?false:b(this,a.a_13,4)===0?false:true};a.prototype.r_mark_sUn=a.prototype.g;a.prototype.q=function(){return!c(this)?false:b(this,a.a_14,4)===0?false:!h(this)?false:true};a.prototype.r_mark_yUz=a.prototype.q;a.prototype.h=function(){return b(this,a.a_15,4)===0?false:true};a.prototype.r_mark_sUnUz=a.prototype.h;a.prototype.V=function(){return!c(this)?false:b(this,a.a_16,2)===0?false:true};a.prototype.r_mark_lAr=a.prototype.V;a.prototype.a=function(){return!c(this)?false:b(this,a.a_17,4)===0?false:true};a.prototype.r_mark_nUz=a.prototype.a;a.prototype.S=function(){return!c(this)?false:b(this,a.a_18,8)===0?false:true};a.prototype.r_mark_DUr=a.prototype.S;a.prototype.T=function(){return b(this,a.a_19,2)===0?false:true};a.prototype.r_mark_cAsInA=a.prototype.T;a.prototype.n=function(){return!c(this)?false:b(this,a.a_20,32)===0?false:!h(this)?false:true};a.prototype.r_mark_yDU=a.prototype.n;a.prototype.u=function(){return b(this,a.a_21,8)===0?false:!h(this)?false:true};a.prototype.r_mark_ysA=a.prototype.u;a.prototype.t=function(){return!c(this)?false:b(this,a.a_22,4)===0?false:!h(this)?false:true};a.prototype.r_mark_ymUs_=a.prototype.t;a.prototype.r=function(){return!g(this,3,'ken')?false:!h(this)?false:true};a.prototype.r_mark_yken=a.prototype.r;a.prototype.y=function(){var i;var j;var d;var Y;var k;var X;var l;var W;var V;var f;var r;var s;var t;var u;var v;var w;var x;var y;var z;var A;var B;var C;var m;var E;var F;var G;var H;var I;var J;var K;var L;var M;var N;var O;var P;var Q;var R;var S;var T;var U;var p;var o;var D;var n;var q;this.C=this._;this.B_continue_stemming_noun_suffixes=true;r=true;a:while(r===true){r=false;i=this.A-this._;s=true;d:while(s===true){s=false;t=true;b:while(t===true){t=false;j=this.A-this._;u=true;c:while(u===true){u=false;if(!(!c(this)?false:b(this,a.a_22,4)===0?false:!h(this)?false:true)){break c}break b}this._=this.A-j;v=true;c:while(v===true){v=false;if(!(!c(this)?false:b(this,a.a_20,32)===0?false:!h(this)?false:true)){break c}break b}this._=this.A-j;w=true;c:while(w===true){w=false;if(!(b(this,a.a_21,8)===0?false:!h(this)?false:true)){break c}break b}this._=this.A-j;if(!(!g(this,3,'ken')?false:!h(this)?false:true)){break d}}break a}this._=this.A-i;x=true;c:while(x===true){x=false;if(!(b(this,a.a_19,2)===0?false:true)){break c}y=true;b:while(y===true){y=false;d=this.A-this._;z=true;d:while(z===true){z=false;if(!(b(this,a.a_15,4)===0?false:true)){break d}break b}this._=this.A-d;A=true;d:while(A===true){A=false;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){break d}break b}this._=this.A-d;B=true;d:while(B===true){B=false;if(!(!c(this)?false:b(this,a.a_12,4)===0?false:!h(this)?false:true)){break d}break b}this._=this.A-d;C=true;d:while(C===true){C=false;if(!(!c(this)?false:b(this,a.a_13,4)===0?false:true)){break d}break 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false}W=this.A-this._;S=true;b:while(S===true){S=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_22,4)===0?false:!h(this)?false:true)){this._=this.A-W;break b}}break a}this._=this.A-i;if(!(!c(this)?false:b(this,a.a_18,8)===0?false:true)){return false}this.B=this._;if(!e(this,'')){return false}V=this.A-this._;T=true;d:while(T===true){T=false;this.C=this._;U=true;b:while(U===true){U=false;f=this.A-this._;p=true;c:while(p===true){p=false;if(!(b(this,a.a_15,4)===0?false:true)){break c}break b}this._=this.A-f;o=true;c:while(o===true){o=false;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){break c}break b}this._=this.A-f;D=true;c:while(D===true){D=false;if(!(!c(this)?false:b(this,a.a_12,4)===0?false:!h(this)?false:true)){break c}break b}this._=this.A-f;n=true;c:while(n===true){n=false;if(!(!c(this)?false:b(this,a.a_13,4)===0?false:true)){break c}break b}this._=this.A-f;q=true;c:while(q===true){q=false;if(!(!c(this)?false:b(this,a.a_14,4)===0?false:!h(this)?false:true)){break c}break 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false}Z=d.A-d._;G=true;d:while(G===true){G=false;d.C=d._;H=true;b:while(H===true){H=false;l=d.A-d._;I=true;e:while(I===true){I=false;if(!(!c(d)?false:b(d,a.a_18,8)===0?false:true)){break e}break b}d._=d.A-l;J=true;e:while(J===true){J=false;if(!(!c(d)?false:b(d,a.a_20,32)===0?false:!h(d)?false:true)){break e}break b}d._=d.A-l;K=true;e:while(K===true){K=false;if(!(b(d,a.a_21,8)===0?false:!h(d)?false:true)){break e}break b}d._=d.A-l;if(!(!c(d)?false:b(d,a.a_22,4)===0?false:!h(d)?false:true)){d._=d.A-Z;break d}}}d.B_continue_stemming_noun_suffixes=false;break a}d._=d.A-f;L=true;b:while(L===true){L=false;if(!(!c(d)?false:b(d,a.a_17,4)===0?false:true)){break b}M=true;c:while(M===true){M=false;Y=d.A-d._;N=true;d:while(N===true){N=false;if(!(!c(d)?false:b(d,a.a_20,32)===0?false:!h(d)?false:true)){break d}break c}d._=d.A-Y;if(!(b(d,a.a_21,8)===0?false:!h(d)?false:true)){break b}}break a}d._=d.A-f;O=true;c:while(O===true){O=false;P=true;b:while(P===true){P=false;m=d.A-d._;Q=true;d:while(Q===true){Q=false;if(!(b(d,a.a_15,4)===0?false:true)){break d}break b}d._=d.A-m;R=true;d:while(R===true){R=false;if(!(!c(d)?false:b(d,a.a_14,4)===0?false:!h(d)?false:true)){break d}break b}d._=d.A-m;S=true;d:while(S===true){S=false;if(!(!c(d)?false:b(d,a.a_13,4)===0?false:true)){break d}break b}d._=d.A-m;if(!(!c(d)?false:b(d,a.a_12,4)===0?false:!h(d)?false:true)){break c}}d.B=d._;if(!e(d,'')){return false}X=d.A-d._;T=true;b:while(T===true){T=false;d.C=d._;if(!(!c(d)?false:b(d,a.a_22,4)===0?false:!h(d)?false:true)){d._=d.A-X;break b}}break a}d._=d.A-f;if(!(!c(d)?false:b(d,a.a_18,8)===0?false:true)){return false}d.B=d._;if(!e(d,'')){return false}W=d.A-d._;U=true;d:while(U===true){U=false;d.C=d._;V=true;b:while(V===true){V=false;j=d.A-d._;q=true;c:while(q===true){q=false;if(!(b(d,a.a_15,4)===0?false:true)){break c}break b}d._=d.A-j;p=true;c:while(p===true){p=false;if(!(!c(d)?false:b(d,a.a_16,2)===0?false:true)){break c}break b}d._=d.A-j;D=true;c:while(D===true){D=false;if(!(!c(d)?false:b(d,a.a_12,4)===0?false:!h(d)?false:true)){break c}break b}d._=d.A-j;o=true;c:while(o===true){o=false;if(!(!c(d)?false:b(d,a.a_13,4)===0?false:true)){break c}break b}d._=d.A-j;r=true;c:while(r===true){r=false;if(!(!c(d)?false:b(d,a.a_14,4)===0?false:!h(d)?false:true)){break c}break b}d._=d.A-j}if(!(!c(d)?false:b(d,a.a_22,4)===0?false:!h(d)?false:true)){d._=d.A-W;break d}}}d.B=d._;return!e(d,'')?false:true};a.prototype.__=function(){var z;var N;var M;var L;var p;var K;var r;var J;var t;var u;var v;var w;var x;var y;var d;var A;var B;var C;var D;var E;var F;var G;var H;var I;var s;var q;var n;var m;var j;var h;this.C=this._;if(!(!g(this,2,'ki')?false:true)){return false}w=true;b:while(w===true){w=false;z=this.A-this._;x=true;c:while(x===true){x=false;if(!(!c(this)?false:b(this,a.a_6,4)===0?false:true)){break c}this.B=this._;if(!e(this,'')){return false}N=this.A-this._;y=true;f:while(y===true){y=false;this.C=this._;d=true;e:while(d===true){d=false;M=this.A-this._;A=true;d:while(A===true){A=false;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){break d}this.B=this._;if(!e(this,'')){return false}L=this.A-this._;B=true;a:while(B===true){B=false;if(!i(this)){this._=this.A-L;break a}}break e}this._=this.A-M;if(!(b(this,a.a_0,10)===0?false:!k(this)?false:true)){this._=this.A-N;break f}this.B=this._;if(!e(this,'')){return false}p=this.A-this._;C=true;a:while(C===true){C=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-p;break a}this.B=this._;if(!e(this,'')){return false}if(!i(this)){this._=this.A-p;break a}}}}break b}this._=this.A-z;D=true;d:while(D===true){D=false;if(!(!c(this)?false:b(this,a.a_3,4)===0?false:!o(this)?false:true)){break d}this.B=this._;if(!e(this,'')){return false}K=this.A-this._;E=true;e:while(E===true){E=false;this.C=this._;F=true;a:while(F===true){F=false;r=this.A-this._;G=true;c:while(G===true){G=false;if(!(b(this,a.a_1,2)===0?false:true)){break c}this.B=this._;if(!e(this,'')){return false}break a}this._=this.A-r;H=true;f:while(H===true){H=false;this.C=this._;I=true;g:while(I===true){I=false;J=this.A-this._;s=true;c:while(s===true){s=false;if(!(b(this,a.a_0,10)===0?false:!k(this)?false:true)){break c}break g}this._=this.A-J;if(!(!c(this)?false:!f(this,a.g_U,105,305)?false:!l(this)?false:true)){break f}}this.B=this._;if(!e(this,'')){return false}t=this.A-this._;q=true;c:while(q===true){q=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-t;break c}this.B=this._;if(!e(this,'')){return false}if(!i(this)){this._=this.A-t;break c}}break a}this._=this.A-r;if(!i(this)){this._=this.A-K;break e}}}break b}this._=this.A-z;if(!(!c(this)?false:b(this,a.a_7,2)===0?false:true)){return false}n=true;a:while(n===true){n=false;u=this.A-this._;m=true;c:while(m===true){m=false;if(!(b(this,a.a_1,2)===0?false:true)){break c}this.B=this._;if(!e(this,'')){return false}break a}this._=this.A-u;j=true;d:while(j===true){j=false;if(!(!c(this)?false:!f(this,a.g_U,105,305)?false:!l(this)?false:true)){break d}this.B=this._;if(!e(this,'')){return false}v=this.A-this._;h=true;c:while(h===true){h=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-v;break c}this.B=this._;if(!e(this,'')){return false}if(!i(this)){this._=this.A-v;break c}}break a}this._=this.A-u;if(!i(this)){return false}}}return true};a.prototype.r_stem_suffix_chain_before_ki=a.prototype.__;function i(d){var j;var O;var N;var M;var q;var L;var s;var K;var u;var v;var w;var x;var y;var z;var h;var B;var C;var D;var E;var F;var G;var H;var I;var J;var t;var r;var p;var n;var m;var A;d.C=d._;if(!(!g(d,2,'ki')?false:true)){return false}x=true;b:while(x===true){x=false;j=d.A-d._;y=true;c:while(y===true){y=false;if(!(!c(d)?false:b(d,a.a_6,4)===0?false:true)){break c}d.B=d._;if(!e(d,'')){return false}O=d.A-d._;z=true;f:while(z===true){z=false;d.C=d._;h=true;e:while(h===true){h=false;N=d.A-d._;B=true;d:while(B===true){B=false;if(!(!c(d)?false:b(d,a.a_16,2)===0?false:true)){break d}d.B=d._;if(!e(d,'')){return false}M=d.A-d._;C=true;a:while(C===true){C=false;if(!i(d)){d._=d.A-M;break a}}break e}d._=d.A-N;if(!(b(d,a.a_0,10)===0?false:!k(d)?false:true)){d._=d.A-O;break f}d.B=d._;if(!e(d,'')){return false}q=d.A-d._;D=true;a:while(D===true){D=false;d.C=d._;if(!(!c(d)?false:b(d,a.a_16,2)===0?false:true)){d._=d.A-q;break a}d.B=d._;if(!e(d,'')){return false}if(!i(d)){d._=d.A-q;break a}}}}break b}d._=d.A-j;E=true;d:while(E===true){E=false;if(!(!c(d)?false:b(d,a.a_3,4)===0?false:!o(d)?false:true)){break d}d.B=d._;if(!e(d,'')){return false}L=d.A-d._;F=true;e:while(F===true){F=false;d.C=d._;G=true;a:while(G===true){G=false;s=d.A-d._;H=true;c:while(H===true){H=false;if(!(b(d,a.a_1,2)===0?false:true)){break c}d.B=d._;if(!e(d,'')){return false}break a}d._=d.A-s;I=true;f:while(I===true){I=false;d.C=d._;J=true;g:while(J===true){J=false;K=d.A-d._;t=true;c:while(t===true){t=false;if(!(b(d,a.a_0,10)===0?false:!k(d)?false:true)){break c}break g}d._=d.A-K;if(!(!c(d)?false:!f(d,a.g_U,105,305)?false:!l(d)?false:true)){break f}}d.B=d._;if(!e(d,'')){return false}u=d.A-d._;r=true;c:while(r===true){r=false;d.C=d._;if(!(!c(d)?false:b(d,a.a_16,2)===0?false:true)){d._=d.A-u;break c}d.B=d._;if(!e(d,'')){return false}if(!i(d)){d._=d.A-u;break c}}break a}d._=d.A-s;if(!i(d)){d._=d.A-L;break e}}}break b}d._=d.A-j;if(!(!c(d)?false:b(d,a.a_7,2)===0?false:true)){return false}p=true;a:while(p===true){p=false;v=d.A-d._;n=true;c:while(n===true){n=false;if(!(b(d,a.a_1,2)===0?false:true)){break c}d.B=d._;if(!e(d,'')){return false}break 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az;y=true;a:while(y===true){y=false;d=this.A-this._;z=true;b:while(z===true){z=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){break b}this.B=this._;if(!e(this,'')){return false}ar=this.A-this._;A=true;c:while(A===true){A=false;if(!i(this)){this._=this.A-ar;break c}}break a}this._=this.A-d;B=true;g:while(B===true){B=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_11,2)===0?false:!o(this)?false:true)){break g}this.B=this._;if(!e(this,'')){return false}S=this.A-this._;C=true;b:while(C===true){C=false;D=true;c:while(D===true){D=false;j=this.A-this._;E=true;d:while(E===true){E=false;this.C=this._;if(!(b(this,a.a_1,2)===0?false:true)){break d}this.B=this._;if(!e(this,'')){return false}break c}this._=this.A-j;F=true;f:while(F===true){F=false;this.C=this._;G=true;d:while(G===true){G=false;av=this.A-this._;H=true;e:while(H===true){H=false;if(!(b(this,a.a_0,10)===0?false:!k(this)?false:true)){break e}break 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c}this._=this.A-r;$=true;b:while($===true){$=false;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){break b}this.B=this._;if(!e(this,'')){return false}as=this.A-this._;a0=true;f:while(a0===true){a0=false;if(!i(this)){this._=this.A-as;break f}}break c}this._=this.A-r;if(!i(this)){this._=this.A-ap;break e}}}break a}this._=this.A-d;a1=true;d:while(a1===true){a1=false;this.C=this._;a2=true;b:while(a2===true){a2=false;at=this.A-this._;a3=true;c:while(a3===true){a3=false;if(!(!c(this)?false:b(this,a.a_3,4)===0?false:!o(this)?false:true)){break c}break b}this._=this.A-at;if(!(!c(this)?false:b(this,a.a_10,2)===0?false:!h(this)?false:true)){break d}}this.B=this._;if(!e(this,'')){return false}au=this.A-this._;a4=true;e:while(a4===true){a4=false;a5=true;c:while(a5===true){a5=false;t=this.A-this._;a6=true;b:while(a6===true){a6=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){break b}this.B=this._;if(!e(this,'')){return false}if(!i(this)){break b}break c}this._=this.A-t;a7=true;f:while(a7===true){a7=false;this.C=this._;a8=true;b:while(a8===true){a8=false;aw=this.A-this._;a9=true;g:while(a9===true){a9=false;if(!(b(this,a.a_0,10)===0?false:!k(this)?false:true)){break g}break b}this._=this.A-aw;if(!(!c(this)?false:!f(this,a.g_U,105,305)?false:!l(this)?false:true)){break f}}this.B=this._;if(!e(this,'')){return false}u=this.A-this._;aa=true;b:while(aa===true){aa=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-u;break b}this.B=this._;if(!e(this,'')){return false}if(!i(this)){this._=this.A-u;break b}}break c}this._=this.A-t;if(!i(this)){this._=this.A-au;break e}}}break a}this._=this.A-d;ab=true;b:while(ab===true){ab=false;this.C=this._;if(!(b(this,a.a_1,2)===0?false:true)){break b}this.B=this._;if(!e(this,'')){return false}break a}this._=this.A-d;ac=true;b:while(ac===true){ac=false;if(!i(this)){break b}break a}this._=this.A-d;ad=true;c:while(ad===true){ad=false;this.C=this._;ae=true;b:while(ae===true){ae=false;v=this.A-this._;af=true;d:while(af===true){af=false;if(!(!c(this)?false:b(this,a.a_6,4)===0?false:true)){break d}break b}this._=this.A-v;ag=true;d:while(ag===true){ag=false;if(!(!c(this)?false:!f(this,a.g_U,105,305)?false:!h(this)?false:true)){break d}break b}this._=this.A-v;if(!(!c(this)?false:b(this,a.a_4,2)===0?false:!h(this)?false:true)){break c}}this.B=this._;if(!e(this,'')){return false}w=this.A-this._;ah=true;b:while(ah===true){ah=false;this.C=this._;ai=true;d:while(ai===true){ai=false;aA=this.A-this._;aj=true;e:while(aj===true){aj=false;if(!(b(this,a.a_0,10)===0?false:!k(this)?false:true)){break e}this.B=this._;if(!e(this,'')){return false}aB=this.A-this._;ak=true;f:while(ak===true){ak=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-aB;break f}}break d}this._=this.A-aA;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-w;break b}}this.B=this._;if(!e(this,'')){return false}this.C=this._;if(!i(this)){this._=this.A-w;break b}}break a}az=this._=this.A-d;this.C=az;al=true;b:while(al===true){al=false;ao=this.A-this._;am=true;c:while(am===true){am=false;if(!(b(this,a.a_0,10)===0?false:!k(this)?false:true)){break c}break b}this._=this.A-ao;if(!(!c(this)?false:!f(this,a.g_U,105,305)?false:!l(this)?false:true)){return false}}this.B=this._;if(!e(this,'')){return false}x=this.A-this._;an=true;b:while(an===true){an=false;this.C=this._;if(!(!c(this)?false:b(this,a.a_16,2)===0?false:true)){this._=this.A-x;break b}this.B=this._;if(!e(this,'')){return false}if(!i(this)){this._=this.A-x;break b}}}return true};a.prototype.r_stem_noun_suffixes=a.prototype.z;function L(d){var g;var as;var S;var m;var aw;var n;var ar;var p;var q;var ay;var az;var r;var aq;var s;var t;var at;var au;var av;var u;var ax;var v;var w;var x;var aB;var aC;var ap;var y;var z;var A;var B;var C;var D;var E;var F;var G;var H;var I;var J;var K;var L;var M;var N;var O;var P;var Q;var R;var j;var T;var U;var V;var W;var X;var Y;var Z;var _;var $;var a0;var a1;var a2;var a3;var a4;var a5;var a6;var a7;var a8;var a9;var aa;var ab;var ac;var ad;var ae;var af;var ag;var ah;var ai;var aj;var ak;var al;var am;var an;var ao;var aD;var aA;z=true;a:while(z===true){z=false;g=d.A-d._;A=true;b:while(A===true){A=false;d.C=d._;if(!(!c(d)?false:b(d,a.a_16,2)===0?false:true)){break b}d.B=d._;if(!e(d,'')){return false}as=d.A-d._;B=true;c:while(B===true){B=false;if(!i(d)){d._=d.A-as;break c}}break a}d._=d.A-g;C=true;g:while(C===true){C=false;d.C=d._;if(!(!c(d)?false:b(d,a.a_11,2)===0?false:!o(d)?false:true)){break g}d.B=d._;if(!e(d,'')){return false}S=d.A-d._;D=true;b:while(D===true){D=false;E=true;c:while(E===true){E=false;m=d.A-d._;F=true;d:while(F===true){F=false;d.C=d._;if(!(b(d,a.a_1,2)===0?false:true)){break d}d.B=d._;if(!e(d,'')){return false}break 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false}f=this._=d;this.D=f;h=this._=g=this.A;e=g-h;b=true;a:while(b===true){b=false;if(!z(this)){break a}}this._=this.A-e;c=true;a:while(c===true){c=false;if(!w(this)){break a}}this._=this.D;return true};a.prototype.r_postlude=a.prototype.x;function O(a){var e;var f;var b;var c;var d;var g;var h;var i;e=a._;b=true;a:while(b===true){b=false;if(!x(a)){break a}return false}g=a._=e;a.D=g;i=a._=h=a.A;f=h-i;c=true;a:while(c===true){c=false;if(!z(a)){break a}}a._=a.A-f;d=true;a:while(d===true){d=false;if(!w(a)){break a}}a._=a.D;return true};a.prototype.H=function(){var c;var a;var b;var d;var e;if(!N(this)){return false}this.D=this._;e=this._=d=this.A;c=d-e;a=true;a:while(a===true){a=false;if(!J(this)){break a}}this._=this.A-c;if(!this.B_continue_stemming_noun_suffixes){return false}b=true;a:while(b===true){b=false;if(!L(this)){break a}}this._=this.D;return!O(this)?false:true};a.prototype.stem=a.prototype.H;a.prototype.L=function(b){return b instanceof a};a.prototype.equals=a.prototype.L;a.prototype.M=function(){var c;var a;var b;var d;c='TurkishStemmer';a=0;for(b=0;b<c.length;b++){d=c.charCodeAt(b);a=(a<<5)-a+d;a=a&a}return a|0};a.prototype.hashCode=a.prototype.M;a.serialVersionUID=1;j(a,'methodObject',function(){return new a});j(a,'a_0',function(){return[new d('m',-1,-1),new d('n',-1,-1),new d('miz',-1,-1),new d('niz',-1,-1),new d('muz',-1,-1),new d('nuz',-1,-1),new d('müz',-1,-1),new d('nüz',-1,-1),new d('mız',-1,-1),new d('nız',-1,-1)]});j(a,'a_1',function(){return[new d('leri',-1,-1),new d('ları',-1,-1)]});j(a,'a_2',function(){return[new d('ni',-1,-1),new d('nu',-1,-1),new d('nü',-1,-1),new d('nı',-1,-1)]});j(a,'a_3',function(){return[new d('in',-1,-1),new d('un',-1,-1),new d('ün',-1,-1),new d('ın',-1,-1)]});j(a,'a_4',function(){return[new d('a',-1,-1),new d('e',-1,-1)]});j(a,'a_5',function(){return[new d('na',-1,-1),new d('ne',-1,-1)]});j(a,'a_6',function(){return[new d('da',-1,-1),new d('ta',-1,-1),new d('de',-1,-1),new d('te',-1,-1)]});j(a,'a_7',function(){return[new d('nda',-1,-1),new d('nde',-1,-1)]});j(a,'a_8',function(){return[new d('dan',-1,-1),new d('tan',-1,-1),new d('den',-1,-1),new d('ten',-1,-1)]});j(a,'a_9',function(){return[new d('ndan',-1,-1),new d('nden',-1,-1)]});j(a,'a_10',function(){return[new d('la',-1,-1),new d('le',-1,-1)]});j(a,'a_11',function(){return[new d('ca',-1,-1),new d('ce',-1,-1)]});j(a,'a_12',function(){return[new d('im',-1,-1),new d('um',-1,-1),new d('üm',-1,-1),new d('ım',-1,-1)]});j(a,'a_13',function(){return[new d('sin',-1,-1),new d('sun',-1,-1),new d('sün',-1,-1),new d('sın',-1,-1)]});j(a,'a_14',function(){return[new d('iz',-1,-1),new d('uz',-1,-1),new d('üz',-1,-1),new d('ız',-1,-1)]});j(a,'a_15',function(){return[new d('siniz',-1,-1),new d('sunuz',-1,-1),new d('sünüz',-1,-1),new d('sınız',-1,-1)]});j(a,'a_16',function(){return[new d('lar',-1,-1),new d('ler',-1,-1)]});j(a,'a_17',function(){return[new d('niz',-1,-1),new d('nuz',-1,-1),new d('nüz',-1,-1),new d('nız',-1,-1)]});j(a,'a_18',function(){return[new d('dir',-1,-1),new d('tir',-1,-1),new d('dur',-1,-1),new d('tur',-1,-1),new d('dür',-1,-1),new d('tür',-1,-1),new d('dır',-1,-1),new d('tır',-1,-1)]});j(a,'a_19',function(){return[new d('casına',-1,-1),new d('cesine',-1,-1)]});j(a,'a_20',function(){return[new d('di',-1,-1),new d('ti',-1,-1),new d('dik',-1,-1),new d('tik',-1,-1),new d('duk',-1,-1),new d('tuk',-1,-1),new d('dük',-1,-1),new d('tük',-1,-1),new d('dık',-1,-1),new d('tık',-1,-1),new d('dim',-1,-1),new d('tim',-1,-1),new d('dum',-1,-1),new d('tum',-1,-1),new d('düm',-1,-1),new d('tüm',-1,-1),new d('dım',-1,-1),new d('tım',-1,-1),new d('din',-1,-1),new d('tin',-1,-1),new d('dun',-1,-1),new d('tun',-1,-1),new d('dün',-1,-1),new d('tün',-1,-1),new d('dın',-1,-1),new d('tın',-1,-1),new d('du',-1,-1),new d('tu',-1,-1),new d('dü',-1,-1),new d('tü',-1,-1),new d('dı',-1,-1),new d('tı',-1,-1)]});j(a,'a_21',function(){return[new d('sa',-1,-1),new d('se',-1,-1),new d('sak',-1,-1),new d('sek',-1,-1),new d('sam',-1,-1),new d('sem',-1,-1),new d('san',-1,-1),new d('sen',-1,-1)]});j(a,'a_22',function(){return[new d('miş',-1,-1),new d('muş',-1,-1),new d('müş',-1,-1),new d('mış',-1,-1)]});j(a,'a_23',function(){return[new d('b',-1,1),new d('c',-1,2),new d('d',-1,3),new d('ğ',-1,4)]});j(a,'g_vowel',function(){return[17,65,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,32,8,0,0,0,0,0,0,1]});j(a,'g_U',function(){return[1,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,1]});j(a,'g_vowel1',function(){return[1,64,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1]});j(a,'g_vowel2',function(){return[17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,130]});j(a,'g_vowel3',function(){return[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1]});j(a,'g_vowel4',function(){return[17]});j(a,'g_vowel5',function(){return[65]});j(a,'g_vowel6',function(){return[65]});var y={'src/stemmer.jsx':{Stemmer:u},'src/turkish-stemmer.jsx':{TurkishStemmer:a}}}(JSX))
@@ -29,10 +28,8 @@ class SearchTurkish(SearchLanguage):
     js_stemmer_code = js_stemmer
     stopwords = set()  # type: Set[str]
 
-    def init(self, options):
-        # type: (Dict) -> None
+    def init(self, options: Dict) -> None:
         self.stemmer = snowballstemmer.stemmer('turkish')
 
-    def stem(self, word):
-        # type: (str) -> str
+    def stem(self, word: str) -> str:
         return self.stemmer.stemWord(word.lower())
diff --git a/sphinx/search/zh.py b/sphinx/search/zh.py
index ed5f52265..62a6d1206 100644
--- a/sphinx/search/zh.py
+++ b/sphinx/search/zh.py
@@ -10,6 +10,7 @@
 
 import os
 import re
+from typing import Dict, List
 
 from sphinx.search import SearchLanguage
 from sphinx.util.stemmer import get_stemmer
@@ -20,10 +21,6 @@ try:
 except ImportError:
     JIEBA = False
 
-if False:
-    # For type annotation
-    from typing import Dict, List  # NOQA
-
 english_stopwords = set("""
 a  and  are  as  at
 be  but  by
@@ -235,8 +232,7 @@ class SearchChinese(SearchLanguage):
     latin1_letters = re.compile(r'[a-zA-Z0-9_]+')
     latin_terms = []  # type: List[str]
 
-    def init(self, options):
-        # type: (Dict) -> None
+    def init(self, options: Dict) -> None:
         if JIEBA:
             dict_path = options.get('dict')
             if dict_path and os.path.isfile(dict_path):
@@ -244,8 +240,7 @@ class SearchChinese(SearchLanguage):
 
         self.stemmer = get_stemmer()
 
-    def split(self, input):
-        # type: (str) -> List[str]
+    def split(self, input: str) -> List[str]:
         chinese = []  # type: List[str]
         if JIEBA:
             chinese = list(jieba.cut_for_search(input))
@@ -255,13 +250,10 @@ class SearchChinese(SearchLanguage):
         self.latin_terms.extend(latin1)
         return chinese + latin1
 
-    def word_filter(self, stemmed_word):
-        # type: (str) -> bool
+    def word_filter(self, stemmed_word: str) -> bool:
         return len(stemmed_word) > 1
 
-    def stem(self, word):
-        # type: (str) -> str
-
+    def stem(self, word: str) -> str:
         # Don't stem Latin words that are long enough to be relevant for search
         # if not stemmed, but would be too short after being stemmed
         # avoids some issues with acronyms