stage2 提供sys包装 解决stage1的bug

stage1/spl_parser.c

@@ -941,17 +941,6 @@ static spl_ast_node_ref_t parse_type_base(spl_parser_t *p) {
         spl_ast_node_t *tp = node_at(p->ast, ref);
         SET_STR_FIELD(p->ast, tp->type_path.name, bt);
         vec_init(tp->type_path.generic_args);
-
-        while (peek(p) && peek(p)->type == TOK_DOT) {
-            advance(p);
-            const spl_tok_t *seg = peek(p);
-            if (!seg || seg->type != TOK_IDENT) {
-                PARSE_ERROR(p, SPL_DIAG_KIND_PARSE_EXPECTED, seg,
-                            "expected identifier after '.' in type path");
-                break;
-            }
-            advance(p);
-        }
         return ref;
     }