parser: Note intent to switch to a Pratt parser

libconlang/src/parser.rs

@@ -897,6 +897,7 @@ impl<'t> Parser<'t> {
         };
         Ok(Assign { head, op, tail: self.expr_from(Self::exprkind_assign)?.into() }.into())
     }
+    // TODO: use a pratt parser for binary expressions, to simplify this
     binary! {
         exprkind_compare {exprkind_range, compare_op}
         exprkind_range {exprkind_logic, range_op}