tor-browser

commit fb271dc7a2917f66e2ceb0a99a7e001aa0a3cd24
parent c2024682693afe4ee8754342bb2fb36aab387e89
Author: Will Medina <williams.medinaa@gmail.com>
Date:   Mon,  8 Dec 2025 19:53:57 +0000

Bug 2003345 - Add placeholder for Iterator.prototype.join. r=dminor

Differential Revision: https://phabricator.services.mozilla.com/D274844

Diffstat:
M
js/src/builtin/Iterator.js
 | 
9
+++++++++
M
js/src/vm/CommonPropertyNames.h
 | 
1
+
M
js/src/vm/Iteration.cpp
 | 
1
+
M
js/src/vm/JSObject.cpp
 | 
5
+++++

4 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/js/src/builtin/Iterator.js b/js/src/builtin/Iterator.js
@@ -1940,4 +1940,13 @@ function IteratorChunks(chunkSize) {
 function IteratorWindows(windowSize, undersized) {
   return false;
 }
+
+/**
+ *  Iterator.prototype.join ( separator )
+ *
+ *  https://tc39.es/proposal-iterator-join/#sec-iterator.prototype.join
+ */
+function IteratorJoin(separator) {
+	return false;
+}
 #endif
diff --git a/js/src/vm/CommonPropertyNames.h b/js/src/vm/CommonPropertyNames.h
@@ -284,6 +284,7 @@
   MACRO_(IteratorClose, "IteratorClose")                                       \
   MACRO_(Iterator_Helper_, "Iterator Helper")                                  \
   MACRO_(IteratorNext, "IteratorNext")                                         \
+  MACRO_(join, "join")                                                         \
   MACRO2(js, "js")                                                             \
   MACRO_(jsTag, "JSTag")                                                       \
   MACRO_(jsStringModule, "js-string")                                          \
diff --git a/js/src/vm/Iteration.cpp b/js/src/vm/Iteration.cpp
@@ -1982,6 +1982,7 @@ static const JSFunctionSpec iterator_methods[] = {
 #ifdef NIGHTLY_BUILD
     JS_SELF_HOSTED_FN("chunks", "IteratorChunks", 1, 0),
     JS_SELF_HOSTED_FN("windows", "IteratorWindows", 2, 0),
+    JS_SELF_HOSTED_FN("join", "IteratorJoin", 1, 0),
 #endif
     JS_FS_END,
 };
diff --git a/js/src/vm/JSObject.cpp b/js/src/vm/JSObject.cpp
@@ -2251,6 +2251,11 @@ JS_PUBLIC_API bool js::ShouldIgnorePropertyDefinition(JSContext* cx,
       return true;
     }
   }
+  if (key == JSProto_Iterator && !JS::Prefs::experimental_iterator_join()) {
+    if (id == NameToId(cx->names().join)) {
+      return true;
+    }
+  }
 #endif
 
   if (key == JSProto_Function &&