From 82b08fa01b0980e7998760fe3cbba50c855ce454 Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Thu, 9 May 2019 01:20:35 +0200
Subject: Update dhall-lang submodule

---
 dhall_syntax/src/core/text.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'dhall_syntax/src/core')

diff --git a/dhall_syntax/src/core/text.rs b/dhall_syntax/src/core/text.rs
index 83643d9..e79a86b 100644
--- a/dhall_syntax/src/core/text.rs
+++ b/dhall_syntax/src/core/text.rs
@@ -43,6 +43,18 @@ impl<SubExpr> InterpolatedTextContents<SubExpr> {
 }
 
 impl<SubExpr> InterpolatedText<SubExpr> {
+    pub fn head(&self) -> &str {
+        &self.head
+    }
+
+    pub fn head_mut(&mut self) -> &mut String {
+        &mut self.head
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.head.is_empty() && self.tail.is_empty()
+    }
+
     pub fn traverse_ref<'a, SubExpr2, E, F>(
         &'a self,
         mut f: F,
-- 
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