Consume __extension__

Author: eldarkg

cxxheaderparser/lexer.py

@@ -100,6 +100,7 @@ class PlyLexer:
         "enum",
         "explicit",
         "export",
+        "__extension__",
         "extern",
         "false",
         "final",

cxxheaderparser/parser.py

@@ -302,6 +302,7 @@ def parse(self) -> None:
         ] = {
             "__attribute__": self._consume_gcc_attribute,
             "__declspec": self._consume_declspec,
+            "__extension__": lambda _1, _2: None,
             "alignas": self._consume_attribute_specifier_seq,
             "extern": self._parse_extern,
             "friend": self._parse_friend_decl,