Address review comments.

libcxx/test/libcxx/feature_test_macro/implemented_ftms.sh.py

@@ -6,7 +6,7 @@
 #
 # ===----------------------------------------------------------------------===##
 
-# RUN: %{python} %s %{libcxx-dir}/utils %{libcxx-dir}/utils/data/feature_test_macros/test_data.json
+# RUN: %{python} %s %{libcxx-dir}/utils %{libcxx-dir}/test/libcxx/feature_test_macro/test_data.json
 
 import sys
 

libcxx/test/libcxx/feature_test_macro/standard_ftms.sh.py

@@ -6,7 +6,7 @@
 #
 # ===----------------------------------------------------------------------===##
 
-# RUN: %{python} %s %{libcxx-dir}/utils %{libcxx-dir}/utils/data/feature_test_macros/test_data.json
+# RUN: %{python} %s %{libcxx-dir}/utils %{libcxx-dir}/test/libcxx/feature_test_macro/test_data.json
 
 import sys
 

libcxx/test/libcxx/feature_test_macro/std_dialects.sh.py

@@ -6,7 +6,7 @@
 #
 # ===----------------------------------------------------------------------===##
 
-# RUN: %{python} %s %{libcxx-dir}/utils %{libcxx-dir}/utils/data/feature_test_macros/test_data.json
+# RUN: %{python} %s %{libcxx-dir}/utils %{libcxx-dir}/test/libcxx/feature_test_macro/test_data.json
 
 import sys
 

libcxx/utils/generate_feature_test_macro_components.py

@@ -3,6 +3,7 @@
 import os
 from builtins import range
 from functools import reduce
+from typing import Any, Dict, List  # Needed for python 3.8 compatibility.
 import functools
 import json
 
@@ -1869,8 +1870,10 @@ def produce_docs():
         f.write(doc_str)
 
 
-def get_dialect_versions(data, std_dialects, use_implemented_status):
-    """Impementation for feature_test_macros.get_(std_|)dialect_versions()."""
+def get_ftms(
+    data, std_dialects: List[str], use_implemented_status: bool
+) -> Dict[str, Dict[str, Any]]:
+    """Impementation for FeatureTestMacros.(standard|implemented)_ftms()."""
     result = dict()
     for feature in data:
         last = None
@@ -2000,20 +2003,20 @@ class FeatureTestMacros:
     # The JSON data structure.
     __data = None
 
-    def __init__(self, filename):
+    def __init__(self, filename: str):
         """Initializes the class with the JSON data in the file 'filename'."""
         self.__data = json.load(open(filename))
 
     @functools.cached_property
-    def std_dialects(self):
+    def std_dialects(self) -> List[str]:
         """Returns the C++ dialects avaiable.
 
         The available dialects are based on the 'c++xy' keys found the 'values'
         entries in '__data'. So when WG21 starts to feature-test macros for a
         future C++ Standard this dialect will automatically be available.
 
         The return value is a sorted list with the C++ dialects used. Since FTM
-        were added in C++14 the list will not contain C++98 or C++11.
+        were added in C++14 the list will not contain C++03 or C++11.
         """
         dialects = set()
         for feature in self.__data:
@@ -2024,7 +2027,7 @@ def std_dialects(self):
         return sorted(list(dialects))
 
     @functools.cached_property
-    def standard_ftms(self):
+    def standard_ftms(self) -> Dict[str, Dict[str, Any]]:
         """Returns the FTM versions per dialect in the Standard.
 
         This function does not use the 'implemented' flag. The output contains
@@ -2038,10 +2041,10 @@ def standard_ftms(self):
           * key: The version of the C++ dialect.
           * value: The value of the feature-test macro.
         """
-        return get_dialect_versions(self.__data, self.std_dialects, False)
+        return get_ftms(self.__data, self.std_dialects, False)
 
     @functools.cached_property
-    def implemented_ftms(self):
+    def implemented_ftms(self) -> Dict[str, Dict[str, Any]]:
         """Returns the FTM versions per dialect implemented in libc++.
 
         Unlike `get_std_dialect_versions` this function uses the 'implemented'
@@ -2055,7 +2058,7 @@ def implemented_ftms(self):
             macro is not implemented its value is None.
         """
 
-        return get_dialect_versions(self.__data, self.std_dialects, True)
+        return get_ftms(self.__data, self.std_dialects, True)
 
 
 def main():