Fix examples

examples/grammar.py

@@ -514,6 +514,7 @@ FineGrammar=Grammar(
 )
 
 if __name__ == "__main__":
+    import os
     from pathlib import Path
     from parser.parser import dump_lexer_table
     from parser.emacs import emit_emacs_major_mode
@@ -530,6 +531,7 @@ if __name__ == "__main__":
 
     # Generate tree-sitter parser and emacs mode.
     ts_path = Path(__file__).parent / "tree-sitter-fine"
+    os.makedirs(ts_path, exist_ok=True)
     emit_tree_sitter_grammar(grammar, ts_path)
     emit_tree_sitter_queries(grammar, ts_path)
     emit_emacs_major_mode(grammar, ts_path / "fine.el")

examples/sql.py

@@ -171,7 +171,7 @@ def sql():
 
 @rule
 def schema():
-    seq(
+    return seq(
         CREATE,
         SCHEMA,
         AUTHORIZATION,
@@ -759,3 +759,7 @@ SQL = Grammar(
     trivia=[BLANKS, COMMENT, LINE_BREAK],
     name="SQL",
 )
+
+if __name__=="__main__":
+    tbl = SQL.build_table()
+    print(tbl.format())