Allow nested filters.

Author: jg-rp

CHANGELOG.md

@@ -23,6 +23,7 @@
 - Raise a `JSONPathIndexError` if an index selector is out of range.
 - Raise a `JSONPathSyntaxError` for too many colons in a slice selector.
 - Raise a `JSONPathIndexError` if a slice selector argument is out of range.
+- Allow nested filters.
 
 ## Version 0.4.0
 

jsonpath/parse.py

@@ -285,7 +285,7 @@ def parse_path(
                 )
             elif stream.current.kind == TOKEN_LIST_START:
                 yield self.parse_selector_list(stream)
-            elif stream.current.kind == TOKEN_FILTER_START and not in_filter:
+            elif stream.current.kind == TOKEN_FILTER_START:
                 yield self.parse_filter(stream)
             else:
                 if in_filter:

tests/compliance.py

@@ -35,7 +35,6 @@ class Case:
 
 
 SKIP = {
-    "filter, nested": "not supported",
     "no leading whitespace": "flexible whitespace policy",
     "no trailing whitespace": "flexible whitespace policy",
 }

tests/test_ietf.py

@@ -171,12 +171,12 @@ class Case:
             {"p": 1, "q": 2, "r": 3, "s": 5, "t": {"u": 6}},
         ],
     ),
-    # Case(
-    #     description="filter selector - Nested filters",
-    #     path="$[?(@[?(@.b)])]	",
-    #     data=FILTER_SELECTOR_DATA,
-    #     want=[[3, 5, 1, 2, 4, 6, {"b": "j"}, {"b": "k"}, {"b": {}}, {"b": "kilo"}]],
-    # ),
+    Case(
+        description="filter selector - Nested filters",
+        path="$[?(@[?(@.b)])]	",
+        data=FILTER_SELECTOR_DATA,
+        want=[[3, 5, 1, 2, 4, 6, {"b": "j"}, {"b": "k"}, {"b": {}}, {"b": "kilo"}]],
+    ),
     Case(
         description="filter selector - Array value logical OR",
         path='$.a[?(@<2 || @.b == "k")]',