👌 IMPROVE: Make srcCharCode immutable (#114)

Author: hukkinj1

markdown_it/parser_block.py

@@ -1,6 +1,6 @@
 """Block-level tokenizer."""
 import logging
-from typing import List, Optional
+from typing import List, Optional, Tuple
 
 from .ruler import Ruler
 from .token import Token
@@ -98,7 +98,7 @@ def parse(
         md,
         env,
         outTokens: List[Token],
-        ords: Optional[List[int]] = None,
+        ords: Optional[Tuple[int, ...]] = None,
     ):
         """Process input string and push block tokens into `outTokens`."""
         if not src:

markdown_it/ruler.py

@@ -21,6 +21,7 @@ class Ruler
     Iterable,
     List,
     Optional,
+    Tuple,
     TYPE_CHECKING,
     Union,
 )
@@ -33,8 +34,9 @@ class Ruler
 
 
 class StateBase:
+    srcCharCode: Tuple[int, ...]
+
     def __init__(self, src: str, md: "MarkdownIt", env: AttrDict):
-        self.srcCharCode: List[int] = []
         self.src = src
         self.env = env
         self.md = md
@@ -46,7 +48,9 @@ def src(self):
     @src.setter
     def src(self, value):
         self._src = value
-        self.srcCharCode = [ord(c) for c in self.src] if self.src is not None else []
+        self.srcCharCode = (
+            tuple(ord(c) for c in self.src) if self.src is not None else ()
+        )
 
 
 # The first positional arg is always a subtype of `StateBase`. Other

markdown_it/rules_block/state_block.py

@@ -1,4 +1,4 @@
-from typing import List, Optional
+from typing import List, Optional, Tuple
 
 from ..token import Token
 from ..ruler import StateBase
@@ -12,7 +12,7 @@ def __init__(
         md,
         env,
         tokens: List[Token],
-        srcCharCode: Optional[List[int]] = None,
+        srcCharCode: Optional[Tuple[int, ...]] = None,
     ):
 
         if srcCharCode is not None: