From 5692bf2c8a7acfb90a5d03d0bd360c105ba2a72b Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Sat, 16 Mar 2019 00:18:50 +0100
Subject: Store an Option in OptionalLit instead of a vec

Closes #21
---
 dhall_core/src/parser.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'dhall_core/src/parser.rs')

diff --git a/dhall_core/src/parser.rs b/dhall_core/src/parser.rs
index 02242bf..9cbd878 100644
--- a/dhall_core/src/parser.rs
+++ b/dhall_core/src/parser.rs
@@ -648,7 +648,7 @@ rule!(merge_expression<BoxExpr>;
 rule!(empty_collection<BoxExpr>;
     children!(x: str, y: expression) => {
        match x {
-          "Optional" => bx(Expr::OptionalLit(Some(y), vec![])),
+          "Optional" => bx(Expr::OptionalLit(Some(y), None)),
           "List" => bx(Expr::ListLit(Some(y), vec![])),
           _ => unreachable!(),
        }
@@ -657,7 +657,7 @@ rule!(empty_collection<BoxExpr>;
 
 rule!(non_empty_optional<BoxExpr>;
     children!(x: expression, _y: str, z: expression) => {
-        bx(Expr::OptionalLit(Some(z), vec![*x]))
+        bx(Expr::OptionalLit(Some(z), Some(x)))
     }
 );
 
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