add declaring and assignment with parser LHS support

src/parser/if/if.h

@@ -10,7 +10,7 @@ typedef struct {
   ParsedValue *content;
 } ParsedConditional;
 
-ParsedValue *parse_if(char *file, DArray *parsed, DArray *tokens,
+ParsedValue *parse_if(char *file, DArray *tokens,
                       size_t *index);
 
 void free_parsed_if(void *ptr);