Move max_context_len

cacheflow/decoding.py

-from typing import List
+from typing import Optional, Set
 
 
 class DecodingParams:
@@ -9,7 +9,8 @@ class DecodingParams:
         temperature: float = 1.0,
         top_p: float = 1.0,
         use_beam_search: bool = False,
-        stop_token_ids: List[int] = [],
+        stop_token_ids: Set[int] = [],
+        max_context_len: Optional[int] = None,
     ) -> None:
         assert n >= 1
         assert temperature >= 0.0
@@ -22,9 +23,11 @@ class DecodingParams:
             # Zero temperature means greedy decoding.
             assert n == 1
             assert top_p == 1.0
+        assert max_context_len is None or max_context_len >= 0
 
         self.n = n
         self.temperature = temperature
         self.top_p = top_p
         self.use_beam_search = use_beam_search
         self.stop_token_ids = stop_token_ids
+        self.max_context_len = max_context_len

cacheflow/sequence.py

@@ -17,11 +17,9 @@ class Sequence:
         self,
         seq_id: int,
         token_ids: List[int],
-        max_context_len: int,
         block_size: int,
     ) -> None:
         self.seq_id = seq_id
-        self.max_context_len = max_context_len
         self.block_size = block_size
 
         self.logical_token_blocks: List[LogicalTokenBlock] = []