low stack fix

src/bin/g10.rs

@@ -83,5 +83,5 @@ fn main() {
     println!(
         "parsed: {:?}",
         grammar.slr_parser(&mut m.iter_mut()).parse()
-    )
+    );
 }

src/cfg/lr_parser.rs

@@ -110,13 +110,11 @@ where
                             childs: childs.into_iter().rev().map(|(a, _)| a.clone()).collect(),
                         });
                     }
-                    let Some(state) = stack.last() else {
+                    let state = stack.last().map(|s| s.1).unwrap_or(self.parse_table.2);
-                        return Err("Unexpected EOS 2".into());
+                    let Some(next) = self.get_goto(&state, rule) else {
-                    };
-                    let Some(next) = self.get_goto(&state.1, rule) else {
                         return Err(format!(
                             "Invalid reduction: state: {} rule: {:?}",
-                            state.1, rule
+                            state, rule
                         ));
                     };
                     stack.push((

src/main.rs

@@ -197,7 +197,7 @@ fn main() {
     //println!("follow: {:?}", grammar.follow);
     grammar.gen_lr1_automaton();
     println!("conflict: {:?}", grammar.lr1_automaton); 
-    /* let conflict = grammar.gen_ll_parse_table();
+    let conflict = grammar.gen_ll_parse_table();
     println!("conflict: {conflict}");
     println!("prase table: {:?}", grammar.ll_parse_table);
     println!("parse\n\n");
@@ -207,5 +207,5 @@ fn main() {
             .ll_parser(&mut m.iter_mut())
             .parse()
             .map(|tree| tree.clean())
-    ) */
+    )
 }