From 3214536bcc24ba2cd0bd554313efd48ab7984da6 Mon Sep 17 00:00:00 2001
From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Tue, 14 Jul 2020 17:20:29 +0000
Subject: [PATCH] Parser: fixed regexp-literals parsing with '=' characters.

Previously, njs lexer decoded '/=' as an assignment token.

This closes #329 issue on Github.
---
 src/njs_parser.c         | 5 +++++
 src/test/njs_unit_test.c | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/src/njs_parser.c b/src/njs_parser.c
index 5fb5a863..4803292c 100644
--- a/src/njs_parser.c
+++ b/src/njs_parser.c
@@ -1115,6 +1115,7 @@ njs_parser_primary_expression_test(njs_parser_t *parser,
 
     /* RegularExpressionLiteral */
     case NJS_TOKEN_DIVISION:
+    case NJS_TOKEN_DIVISION_ASSIGNMENT:
         node = njs_parser_node_new(parser, NJS_TOKEN_REGEXP);
         if (node == NULL) {
             return NJS_ERROR;
@@ -1201,6 +1202,10 @@ njs_parser_regexp_literal(njs_parser_t *parser, njs_lexer_token_t *token,
     value = &parser->node->u.value;
     lexer = parser->lexer;
 
+    if (token->type == NJS_TOKEN_DIVISION_ASSIGNMENT) {
+        lexer->start--;
+    }
+
     for (p = lexer->start; p < lexer->end; p++) {
 
         switch (*p) {
diff --git a/src/test/njs_unit_test.c b/src/test/njs_unit_test.c
index 1a6dee39..5b184808 100644
--- a/src/test/njs_unit_test.c
+++ b/src/test/njs_unit_test.c
@@ -7582,6 +7582,9 @@ static njs_unit_test_t  njs_test[] =
     { njs_str("'abc'.replace(/f/, 'X')"),
       njs_str("abc") },
 
+    { njs_str("'AB=C==='.replace(/=*$/, '')"),
+      njs_str("AB=C") },
+
     { njs_str("('a'.repeat(33) + 'bb').replace(/bb/, 'CC').slice(31)"),
       njs_str("aaCC") },
 
@@ -7784,6 +7787,9 @@ static njs_unit_test_t  njs_test[] =
     { njs_str("/]/"),
       njs_str("/\\]/") },
 
+    { njs_str("/=/"),
+      njs_str("/=/") },
+
     { njs_str("/["),
       njs_str("SyntaxError: Unterminated RegExp \"/[\" in 1") },
 
-- 
2.47.3