[lint] add the C4 set to fuff

ruff.toml

@@ -1,9 +1,10 @@
 line-length = 88
 
-select = ['F', 'E', 'W', 'UP', 'I', 'YTT', 'S', 'B', 'COM']
+select = ['F', 'E', 'W', 'UP', 'I', 'YTT', 'S', 'B', 'COM', 'C4']
 ignore = [
     'E501', 'E741', 'E402',
     'S101', 'S102', 'S105', 'S301', 'S311',
+    'C408',
 ]
 exclude = ['tatsu/bootstrap.py']
 

tatsu/codegen/objectmodel.py

@@ -135,7 +135,7 @@ def _find_renderer_class(self, node):
 class Rule(ModelRenderer):
     def render_fields(self, fields):
         defs = [safe_name(d) for d, _ in compress_seq(self.defines())]
-        defs = list(sorted(set(defs)))
+        defs = sorted(set(defs))
         spec = fields["spec"]
 
         kwargs = '\n'.join('%s: Any = None' % d for d in defs)

tatsu/contexts.py

@@ -439,7 +439,7 @@ def _memoization(self):
         return self.memoize_lookaheads or self._lookahead == 0
 
     def _rulestack(self):
-        rulestack = map(lambda r: r.name, reversed(self._rule_stack))
+        rulestack = [r.name for r in reversed(self._rule_stack)]
         stack = self.trace_separator.join(rulestack)
         if max(len(s) for s in stack.splitlines()) > self.trace_length:
             stack = stack[:self.trace_length]
@@ -537,7 +537,7 @@ def _trace_match(self, token, name=None, failed=False):
             )
 
     def _make_exception(self, item, exclass=FailedParse):
-        rulestack = list(map(lambda r: r.name, self._rule_stack))
+        rulestack = [r.name for r in self._rule_stack]
         return exclass(self.tokenizer, rulestack, item)
 
     def _error(self, item, exclass=FailedParse):

tatsu/grammars.py

@@ -964,7 +964,7 @@ def __init__(self, name, rules, /, config: ParserConfig|None = None, directives:
 
         missing = self.missing_rules(oset(r.name for r in self.rules))
         if missing:
-            msg = '\n'.join([''] + list(sorted(missing)))
+            msg = '\n'.join([''] + sorted(missing))
             raise GrammarError('Unknown rules, no parser generated:' + msg)
 
         self._calc_lookahead_sets()

tatsu/infos.py

@@ -143,10 +143,10 @@ class LineIndexInfo(NamedTuple):
 
     @staticmethod
     def block_index(name, n):
-        return list(
+        return [
             LineIndexInfo(line, i)
             for line, i in zip(n * [name], range(n), strict=False)
-        )
+        ]
 
 
 class LineInfo(NamedTuple):

tatsu/symtables.py

@@ -236,7 +236,7 @@ def line_index(self, include_entries=False, include_references=False):
                 result.update(index)
         assert isinstance(result, set)
         assert all(isinstance(i, LineIndexInfo) for i in result)
-        return list(sorted(result))
+        return sorted(result)
 
     def reference_line_index(self):
         result = set()
@@ -250,11 +250,11 @@ def __repr__(self):
         return '%s[]' % self.name
 
     def __json__(self, seen=None):
-        return dict([
+        return dict(
             ('node', type(self.node).__name__),
             ('entries', super().__json__(seen=seen)),
             ('references', asjson(self._references, seen=seen)),
-        ])
+        )
 
     def __getstate__(self):
         state = self.__dict__.copy()