From c45367eb373bf52fd370f1a685f68aa05f189265 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Wed, 16 Nov 2016 20:09:00 +0000
Subject: Add rule for unterminated strings

---
 lib/styles/parser/tokeniser.js        | 5 ++++-
 test/styles/parser/tokeniser.tests.js | 4 ++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/styles/parser/tokeniser.js b/lib/styles/parser/tokeniser.js
index 2ada818..b97facd 100644
--- a/lib/styles/parser/tokeniser.js
+++ b/lib/styles/parser/tokeniser.js
@@ -3,6 +3,8 @@ var RegexTokeniser = lop.RegexTokeniser;
 
 exports.tokenise = tokenise;
 
+var stringPrefix = "'((?:\\\\.|[^'])*)";
+
 function tokenise(string) {
     var tokeniser = new RegexTokeniser([
         {name: "identifier", regex: /([a-zA-Z][a-zA-Z0-9\-]*)/},
@@ -16,7 +18,8 @@ function tokenise(string) {
         {name: "close-paren", regex: /\)/},
         {name: "open-square-bracket", regex: /\[/},
         {name: "close-square-bracket", regex: /\]/},
-        {name: "string", regex: /'((?:\\.|[^'])*)'/},
+        {name: "string", regex: new RegExp(stringPrefix + "'")},
+        {name: "unterminated-string", regex: new RegExp(stringPrefix)},
         {name: "integer", regex: /([0-9]+)/},
         {name: "choice", regex: /\|/},
         {name: "bang", regex: /(!)/}
diff --git a/test/styles/parser/tokeniser.tests.js b/test/styles/parser/tokeniser.tests.js
index e8b9d00..a7db79d 100644
--- a/test/styles/parser/tokeniser.tests.js
+++ b/test/styles/parser/tokeniser.tests.js
@@ -31,6 +31,10 @@ test("strings are tokenised", function() {
     assertTokens("'Tristan'", [isToken("string", "Tristan")]);
 });
 
+test("unterminated strings are tokenised", function() {
+    assertTokens("'Tristan", [isToken("unterminated-string", "Tristan")]);
+});
+
 test("arrows are tokenised", function() {
     assertTokens("=>", [isToken("arrow")]);
 });
-- 
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