[njs] Fixed assignment expression from compound assignment.

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/da67f08d365e
branches:  
changeset: 675:da67f08d365e
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Wed Nov 28 15:47:05 2018 +0300
description:
Fixed assignment expression from compound assignment.

diffstat:

 njs/njs_parser_expression.c |  2 +-
 njs/test/njs_unit_test.c    |  9 +++++++++
 2 files changed, 10 insertions(+), 1 deletions(-)

diffs (31 lines):

diff -r 4e62b7a295e0 -r da67f08d365e njs/njs_parser_expression.c
--- a/njs/njs_parser_expression.c	Tue Nov 27 18:58:30 2018 +0300
+++ b/njs/njs_parser_expression.c	Wed Nov 28 15:47:05 2018 +0300
@@ -237,7 +237,7 @@ njs_parser_var_expression(njs_vm_t *vm, 
     njs_parser_node_t       *node;
     njs_vmcode_operation_t  operation;
 
-    token = njs_parser_conditional_expression(vm, parser, token);
+    token = njs_parser_assignment_expression(vm, parser, token);
     if (nxt_slow_path(token <= NJS_TOKEN_ILLEGAL)) {
         return token;
     }
diff -r 4e62b7a295e0 -r da67f08d365e njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c	Tue Nov 27 18:58:30 2018 +0300
+++ b/njs/test/njs_unit_test.c	Wed Nov 28 15:47:05 2018 +0300
@@ -597,6 +597,15 @@ static njs_unit_test_t  njs_test[] =
     { nxt_string("var a, b = (a = [2]) * (3 * 4); a +' '+ b"),
       nxt_string("2 24") },
 
+    { nxt_string("var a = 1; var b = a += 1; b"),
+      nxt_string("2") },
+
+    { nxt_string("var a = 1; var b = a -= 1; b"),
+      nxt_string("0") },
+
+    { nxt_string("var a = 1; var b = a <<= 1; b"),
+      nxt_string("2") },
+
     /* 3 address operation and side effect. */
 
     { nxt_string("var a = 1; function f(x) { a = x; return 2 }; a+f(5)+' '+a"),