From 4fb6b740e79c1942fd0bfde9b167ea273c7d0b4b Mon Sep 17 00:00:00 2001
From: Greg Brown <gmb60@cam.ac.uk>
Date: Thu, 31 Dec 2020 13:29:40 +0000
Subject: First complete working version.

---
 src/ast/typed.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'src/ast/typed.rs')

diff --git a/src/ast/typed.rs b/src/ast/typed.rs
index b81253e..7c3f89e 100644
--- a/src/ast/typed.rs
+++ b/src/ast/typed.rs
@@ -225,7 +225,7 @@ impl FlastContext {
     }
 
     fn is_nullable(&self, index: usize) -> Option<bool> {
-        self.binds.get(index).map(|(null, _, _)| *null)
+        self.binds.get(self.binds.len() - index - 1).map(|(null, _, _)| *null)
     }
 
     fn push_nullable(&mut self, nullable: bool) {
@@ -238,7 +238,7 @@ impl FlastContext {
     }
 
     fn first_set(&self, index: usize) -> Option<&FirstSet> {
-        self.binds.get(index).map(|(_, first, _)| first)
+        self.binds.get(self.binds.len() - index - 1).map(|(_, first, _)| first)
     }
 
     fn push_first_set(&mut self, nullable: bool, first_set: FirstSet) {
@@ -250,7 +250,7 @@ impl FlastContext {
     }
 
     pub fn flast_set(&self, index: usize) -> Option<&FlastSet> {
-        self.binds.get(index).map(|(_, _, flast)| flast)
+        self.binds.get(self.binds.len() - index - 1).map(|(_, _, flast)| flast)
     }
 
     pub fn with_flast_set<F: FnOnce(&mut Self) -> R, R>(
-- 
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