[njs] Fixed ellipsis support.

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/34af2730bf97
branches:  
changeset: 1853:34af2730bf97
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Wed May 11 16:33:46 2022 -0700
description:
Fixed ellipsis support.

As of now, ellispis syntax is supported for function declaration with
the rest arguments.

This closes #365 issue on Github.

diffstat:

 src/njs_parser.c         |  8 ++++++++
 src/test/njs_unit_test.c |  5 +++++
 2 files changed, 13 insertions(+), 0 deletions(-)

diffs (52 lines):

diff -r 5c7e02885c26 -r 34af2730bf97 src/njs_parser.c
--- a/src/njs_parser.c	Fri May 06 18:55:35 2022 -0700
+++ b/src/njs_parser.c	Wed May 11 16:33:46 2022 -0700
@@ -1664,12 +1664,18 @@ njs_parser_array_element_list(njs_parser
         return NJS_OK;
 
     case NJS_TOKEN_ELLIPSIS:
+#if 0
         njs_lexer_consume_token(parser->lexer, 1);
 
         njs_parser_next(parser, njs_parser_assignment_expression);
 
         return njs_parser_after(parser, current, array, 0,
                                 njs_parser_array_spread_element);
+#else
+        (void) njs_parser_array_spread_element;
+        return njs_parser_failed(parser);
+#endif
+
     default:
         break;
     }
@@ -2862,9 +2868,11 @@ njs_parser_argument_list(njs_parser_t *p
      * ArgumentList , ... AssignmentExpression
      */
 
+#if 0 /* TODO. */
     if (token->type == NJS_TOKEN_ELLIPSIS) {
         njs_lexer_consume_token(parser->lexer, 1);
     }
+#endif
 
     njs_parser_next(parser, njs_parser_assignment_expression);
 
diff -r 5c7e02885c26 -r 34af2730bf97 src/test/njs_unit_test.c
--- a/src/test/njs_unit_test.c	Fri May 06 18:55:35 2022 -0700
+++ b/src/test/njs_unit_test.c	Wed May 11 16:33:46 2022 -0700
@@ -18041,9 +18041,14 @@ static njs_unit_test_t  njs_test[] =
     { njs_str("[(]"),
       njs_str("SyntaxError: Unexpected token \"]\" in 1") },
 
+#if 0 /* TODO spreading support. */
     { njs_str("[...]"),
       njs_str("SyntaxError: Unexpected token \"]\" in 1") },
 
+    { njs_str("var id = (x) => x, x = id(...[1,2,3]); typeof x"),
+      njs_str("number") },
+#endif
+
     { njs_str("switch () {}"),
       njs_str("SyntaxError: Unexpected token \")\" in 1") },