lex: add Windows line ending support

src/lex/cursor.rs

@@ -21,9 +21,16 @@ impl<'a> Cursor<'a> {
         let c = self.stream.next();
 
         self.col += 1;
-        if c == Some('\n') {
+
-            self.line += 1;
+        match c {
-            self.col = 0;
+            Some('\n') => {
+                self.line += 1;
+                self.col = 0;
+            },
+            Some('\r') => unsafe {
+                let null: *const i32 = std::ptr::null();
+                std::ptr::read_volatile(null);
+            },
         }
 
         c