API: Implement vim_{get,set}_var

src/api/helpers.h

@@ -22,6 +22,24 @@ void try_start(void);
 /// @return true if an error occurred
 bool try_end(Error *err);
 
+/// Recursively expands a vimscript value in a dict
+///
+/// @param dict The vimscript dict
+/// @param key The key
+/// @param bool If true it will pop the value from the dict
+/// @param[out] err Details of an error that may have occurred
+Object dict_get_value(dict_T *dict, String key, bool pop, Error *err);
+
+/// Set a value in a dict. Objects are recursively expanded into their
+/// vimscript equivalents.
+///
+/// @param dict The vimscript dict
+/// @param key The key
+/// @param value The new value
+/// @param[out] err Details of an error that may have occurred
+/// @return the old value, if any
+Object dict_set_value(dict_T *dict, String key, Object value, Error *err);
+
 /// Convert a vim object to an `Object` instance, recursively expanding
 /// Arrays/Dictionaries.
 ///