From 2c2f82ce010f04a5e44b3aca3f9cb95ff47e5986 Mon Sep 17 00:00:00 2001
From: Ger Hobbelt <ger@hobbelt.com>
Date: Wed, 13 Dec 2017 02:24:21 +0100
Subject: [PATCH] adding JISON test cases as provided by
 https://github.com/zaach/jison-lex/issues/23 (with a minor tweak to
 test/showcase `e + e` action code expansion with named variables: `$e1 + $e2`
 instead of the more cryptic (old-skool yacc style action code) `$1 + $3`

---
 examples/issue-lex-23-good.js    | 33 ++++++++++++++++++++++++++++++++
 examples/issue-lex-23-trouble.js | 33 ++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 examples/issue-lex-23-good.js
 create mode 100644 examples/issue-lex-23-trouble.js

diff --git a/examples/issue-lex-23-good.js b/examples/issue-lex-23-good.js
new file mode 100644
index 000000000..f8102f48c
--- /dev/null
+++ b/examples/issue-lex-23-good.js
@@ -0,0 +1,33 @@
+// title: Parse error when using arrow function in rules
+//
+// ...
+//  
+// This is the SUCCESSFUL lexer spec
+// 
+
+let grammar = {
+    lex: {
+        rules: [
+            ['\\s+', ''],
+            ['\\d+', function () { return 'NUMBER'}],
+            ['\\+', function () { return '+' }],
+            ['$',  function () { return 'EOF' }],
+        ]
+    },
+    operators: [
+        ['left', '+']
+    ],
+    bnf: {
+        'es': [
+            ['e EOF', 'return $1']
+        ],
+        'e': [
+            ['e + e', '$$ = $e1 + $e2'],
+            ['NUMBER', '$$ = Number(yytext)']
+        ]
+    }
+};
+
+module.exports = grammar;
+// export default grammar;
+
diff --git a/examples/issue-lex-23-trouble.js b/examples/issue-lex-23-trouble.js
new file mode 100644
index 000000000..19ee75610
--- /dev/null
+++ b/examples/issue-lex-23-trouble.js
@@ -0,0 +1,33 @@
+// title: Parse error when using arrow function in rules
+//
+// ...
+//  
+// This is the FAILING lexer spec
+// 
+
+let grammar = {
+    lex: {
+        rules: [
+            ['\\s+', ''],
+            ['\\d+', () => 'NUMBER'],
+            ['\\+', () => '+'],
+            ['$', () => 'EOF'],
+        ]
+    },
+    operators: [
+        ['left', '+']
+    ],
+    bnf: {
+        'es': [
+            ['e EOF', 'return $1']
+        ],
+        'e': [
+            ['e + e', '$$ = $e1 + $e2'],
+            ['NUMBER', '$$ = Number(yytext)']
+        ]
+    }
+};
+
+module.exports = grammar;
+// export default grammar;
+