From 1183a0996d560fda9d992a9bb8ca1328465a2b33 Mon Sep 17 00:00:00 2001
From: Greg Brown <gmb60@cam.ac.uk>
Date: Sat, 21 Nov 2020 16:35:30 +0000
Subject: Add code generation

---
 src/ast/typed.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

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

diff --git a/src/ast/typed.rs b/src/ast/typed.rs
index dee13be..a0b8d1b 100644
--- a/src/ast/typed.rs
+++ b/src/ast/typed.rs
@@ -3,7 +3,7 @@ use super::VariableError;
 use std::collections::BTreeSet;
 use std::fmt::Display;
 
-#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Eq, PartialEq, Hash)]
 pub struct FirstSet {
     inner: BTreeSet<char>,
 }
@@ -36,9 +36,13 @@ impl FirstSet {
             inner: self.inner.intersection(&other.inner).copied().collect(),
         }
     }
+
+    pub fn into_iter(self) -> impl Iterator<Item = char> {
+        self.inner.into_iter()
+    }
 }
 
-#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Eq, PartialEq, Hash)]
 pub struct FlastSet {
     inner: BTreeSet<char>,
 }
-- 
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