Added exists to check for selector existing in state

C&P of the method @wileyyugioh provided here jeremyong#58 (comment)
ThePhD · Aug 12, 2017 · 6f8f200 · 6f8f200
1 parent d930332
commit 6f8f200
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/include/selene/Selector.h b/include/selene/Selector.h
@@ -404,6 +404,13 @@ class Selector {
 
     friend bool operator==(const char *, const Selector &);
 
+    bool exists() {
+        ResetStackOnScopeExit save(_state);
+        _traverse();
+        _get();
+
+        return !lua_isnil(_state, -1);
+    }
 private:
     std::string ToString() const {
         ResetStackOnScopeExit save(_state);