From d66fe7ed6ee905ec4e2557cdb1025c0a9061e2bc Mon Sep 17 00:00:00 2001
From: jasonwilliams <jase.williams@gmail.com>
Date: Wed, 15 Aug 2018 21:04:58 +0100
Subject: [PATCH] macro_rules

---
 src/lib/syntax/lexer.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/lib/syntax/lexer.rs b/src/lib/syntax/lexer.rs
index b0980c058a..c1ed43d090 100644
--- a/src/lib/syntax/lexer.rs
+++ b/src/lib/syntax/lexer.rs
@@ -7,6 +7,20 @@ use std::str::FromStr;
 use syntax::ast::punc::Punctuator;
 use syntax::ast::token::{Token, TokenData};
 
+#[allow(unused)]
+macro_rules! vop {
+    ($this:ident, $assign_op:expr, $op:expr) => {
+        let preview = $this.preview_next()?;
+        match preview {
+            '=' => {
+                $this.next()?;
+                $assign_op;
+            }
+            _ => $op,
+        }
+    };
+}
+
 // Defining an error type
 #[derive(Debug, Clone)]
 pub struct LexerError {