added Array.prototype.{with,toReversed,toSpliced,toSorted} and TypedArray.prototype.{with,toReversed,toSorted} (initial patch by bnoordhuis)

TODO

@@ -63,5 +63,5 @@ Optimization ideas:
 Test262o:   0/11262 errors, 463 excluded
 Test262o commit: 7da91bceb9ce7613f87db47ddd1292a2dda58b42 (es5-tests branch)
 
-Result: 16/76471 errors, 1497 excluded, 8355 skipped
+Result: 16/76707 errors, 1497 excluded, 8237 skipped
 Test262 commit: 6cbb6da9473c56d95358d8e679c5a6d2b4574efb

quickjs.c

@@ -1192,6 +1192,10 @@ static JSValue js_typed_array_constructor(JSContext *ctx,
                                           JSValueConst this_val,
                                           int argc, JSValueConst *argv,
                                           int classid);
+static JSValue js_typed_array_constructor_ta(JSContext *ctx,
+                                             JSValueConst new_target,
+                                             JSValueConst src_obj,
+                                             int classid);
 static BOOL typed_array_is_detached(JSContext *ctx, JSObject *p);
 static uint32_t typed_array_get_length(JSContext *ctx, JSObject *p);
 static JSValue JS_ThrowTypeErrorDetachedArrayBuffer(JSContext *ctx);
@@ -8319,6 +8323,30 @@ static int add_fast_array_element(JSContext *ctx, JSObject *p,
     return TRUE;
 }
 
+/* Allocate a new fast array. Its 'length' property is set to zero. It
+   maximum size is 2^31-1 elements. For convenience, 'len' is a 64 bit
+   integer. WARNING: the content of the array is not initialized. */
+static JSValue js_allocate_fast_array(JSContext *ctx, int64_t len)
+{
+    JSValue arr;
+    JSObject *p;
+    
+    if (len > INT32_MAX)
+        return JS_ThrowRangeError(ctx, "invalid array length");
+    arr = JS_NewArray(ctx);
+    if (JS_IsException(arr))
+        return arr;
+    if (len > 0) {
+        p = JS_VALUE_GET_OBJ(arr);
+        if (expand_fast_array(ctx, p, len) < 0) {
+            JS_FreeValue(ctx, arr);
+            return JS_EXCEPTION;
+        }
+        p->u.array.count = len;
+    }
+    return arr;
+}
+
 static void js_free_desc(JSContext *ctx, JSPropertyDescriptor *desc)
 {
     JS_FreeValue(ctx, desc->getter);
@@ -38612,6 +38640,71 @@ static JSValue js_array_at(JSContext *ctx, JSValueConst this_val,
     return JS_EXCEPTION;
 }
 
+static JSValue js_array_with(JSContext *ctx, JSValueConst this_val,
+                             int argc, JSValueConst *argv)
+{
+    JSValue arr, obj, ret, *arrp, *pval;
+    JSObject *p;
+    int64_t i, len, idx;
+    uint32_t count32;
+
+    ret = JS_EXCEPTION;
+    arr = JS_UNDEFINED;
+    obj = JS_ToObject(ctx, this_val);
+    if (js_get_length64(ctx, &len, obj))
+        goto exception;
+
+    if (JS_ToInt64Sat(ctx, &idx, argv[0]))
+        goto exception;
+
+    if (idx < 0)
+        idx = len + idx;
+
+    if (idx < 0 || idx >= len) {
+        JS_ThrowRangeError(ctx, "out of bound");
+        goto exception;
+    }
+
+    arr = js_allocate_fast_array(ctx, len);
+    if (JS_IsException(arr))
+        goto exception;
+
+    p = JS_VALUE_GET_OBJ(arr);
+    i = 0;
+    pval = p->u.array.u.values;
+    if (js_get_fast_array(ctx, obj, &arrp, &count32) && count32 == len) {
+        for (; i < idx; i++, pval++)
+            *pval = JS_DupValue(ctx, arrp[i]);
+        *pval = JS_DupValue(ctx, argv[1]);
+        for (i++, pval++; i < len; i++, pval++)
+            *pval = JS_DupValue(ctx, arrp[i]);
+    } else {
+        for (; i < idx; i++, pval++)
+            if (-1 == JS_TryGetPropertyInt64(ctx, obj, i, pval))
+                goto fill_and_fail;
+        *pval = JS_DupValue(ctx, argv[1]);
+        for (i++, pval++; i < len; i++, pval++) {
+            if (-1 == JS_TryGetPropertyInt64(ctx, obj, i, pval)) {
+            fill_and_fail:
+                for (; i < len; i++, pval++)
+                    *pval = JS_UNDEFINED;
+                goto exception;
+            }
+        }
+    }
+
+    if (JS_SetProperty(ctx, arr, JS_ATOM_length, JS_NewInt64(ctx, len)) < 0)
+        goto exception;
+
+    ret = arr;
+    arr = JS_UNDEFINED;
+
+exception:
+    JS_FreeValue(ctx, arr);
+    JS_FreeValue(ctx, obj);
+    return ret;
+}
+
 static JSValue js_array_concat(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
 {
@@ -39430,6 +39523,61 @@ static JSValue js_array_reverse(JSContext *ctx, JSValueConst this_val,
     return JS_EXCEPTION;
 }
 
+// Note: a.toReversed() is a.slice().reverse() with the twist that a.slice()
+// leaves holes in sparse arrays intact whereas a.toReversed() replaces them
+// with undefined, thus in effect creating a dense array.
+// Does not use Array[@@species], always returns a base Array.
+static JSValue js_array_toReversed(JSContext *ctx, JSValueConst this_val,
+                                   int argc, JSValueConst *argv)
+{
+    JSValue arr, obj, ret, *arrp, *pval;
+    JSObject *p;
+    int64_t i, len;
+    uint32_t count32;
+
+    ret = JS_EXCEPTION;
+    arr = JS_UNDEFINED;
+    obj = JS_ToObject(ctx, this_val);
+    if (js_get_length64(ctx, &len, obj))
+        goto exception;
+
+    arr = js_allocate_fast_array(ctx, len);
+    if (JS_IsException(arr))
+        goto exception;
+
+    if (len > 0) {
+        p = JS_VALUE_GET_OBJ(arr);
+
+        i = len - 1;
+        pval = p->u.array.u.values;
+        if (js_get_fast_array(ctx, obj, &arrp, &count32) && count32 == len) {
+            for (; i >= 0; i--, pval++)
+                *pval = JS_DupValue(ctx, arrp[i]);
+        } else {
+            // Query order is observable; test262 expects descending order.
+            for (; i >= 0; i--, pval++) {
+                if (-1 == JS_TryGetPropertyInt64(ctx, obj, i, pval)) {
+                    // Exception; initialize remaining elements.
+                    for (; i >= 0; i--, pval++)
+                        *pval = JS_UNDEFINED;
+                    goto exception;
+                }
+            }
+        }
+
+        if (JS_SetProperty(ctx, arr, JS_ATOM_length, JS_NewInt64(ctx, len)) < 0)
+            goto exception;
+    }
+
+    ret = arr;
+    arr = JS_UNDEFINED;
+
+exception:
+    JS_FreeValue(ctx, arr);
+    JS_FreeValue(ctx, obj);
+    return ret;
+}
+
 static JSValue js_array_slice(JSContext *ctx, JSValueConst this_val,
                               int argc, JSValueConst *argv, int splice)
 {
@@ -39537,6 +39685,92 @@ static JSValue js_array_slice(JSContext *ctx, JSValueConst this_val,
     return JS_EXCEPTION;
 }
 
+static JSValue js_array_toSpliced(JSContext *ctx, JSValueConst this_val,
+                                  int argc, JSValueConst *argv)
+{
+    JSValue arr, obj, ret, *arrp, *pval, *last;
+    JSObject *p;
+    int64_t i, j, len, newlen, start, add, del;
+    uint32_t count32;
+
+    pval = NULL;
+    last = NULL;
+    ret = JS_EXCEPTION;
+    arr = JS_UNDEFINED;
+
+    obj = JS_ToObject(ctx, this_val);
+    if (js_get_length64(ctx, &len, obj))
+        goto exception;
+
+    start = 0;
+    if (argc > 0)
+        if (JS_ToInt64Clamp(ctx, &start, argv[0], 0, len, len))
+            goto exception;
+
+    del = 0;
+    if (argc > 0)
+        del = len - start;
+    if (argc > 1)
+        if (JS_ToInt64Clamp(ctx, &del, argv[1], 0, del, 0))
+            goto exception;
+
+    add = 0;
+    if (argc > 2)
+        add = argc - 2;
+
+    newlen = len + add - del;
+    if (newlen > MAX_SAFE_INTEGER) {
+        JS_ThrowTypeError(ctx, "invalid array length");
+        goto exception;
+    }
+
+    arr = js_allocate_fast_array(ctx, newlen);
+    if (JS_IsException(arr))
+        goto exception;
+
+    if (newlen <= 0)
+        goto done;
+
+    p = JS_VALUE_GET_OBJ(arr);
+    pval = &p->u.array.u.values[0];
+    last = &p->u.array.u.values[newlen];
+
+    if (js_get_fast_array(ctx, obj, &arrp, &count32) && count32 == len) {
+        for (i = 0; i < start; i++, pval++)
+            *pval = JS_DupValue(ctx, arrp[i]);
+        for (j = 0; j < add; j++, pval++)
+            *pval = JS_DupValue(ctx, argv[2 + j]);
+        for (i += del; i < len; i++, pval++)
+            *pval = JS_DupValue(ctx, arrp[i]);
+    } else {
+        for (i = 0; i < start; i++, pval++)
+            if (-1 == JS_TryGetPropertyInt64(ctx, obj, i, pval))
+                goto exception;
+        for (j = 0; j < add; j++, pval++)
+            *pval = JS_DupValue(ctx, argv[2 + j]);
+        for (i += del; i < len; i++, pval++)
+            if (-1 == JS_TryGetPropertyInt64(ctx, obj, i, pval))
+                goto exception;
+    }
+
+    assert(pval == last);
+
+    if (JS_SetProperty(ctx, arr, JS_ATOM_length, JS_NewInt64(ctx, newlen)) < 0)
+        goto exception;
+
+done:
+    ret = arr;
+    arr = JS_UNDEFINED;
+
+exception:
+    while (pval != last)
+        *pval++ = JS_UNDEFINED;
+
+    JS_FreeValue(ctx, arr);
+    JS_FreeValue(ctx, obj);
+    return ret;
+}
+
 static JSValue js_array_copyWithin(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
 {
@@ -39840,6 +40074,68 @@ fail:
     return JS_EXCEPTION;
 }
 
+// Note: a.toSorted() is a.slice().sort() with the twist that a.slice()
+// leaves holes in sparse arrays intact whereas a.toSorted() replaces them
+// with undefined, thus in effect creating a dense array.
+// Does not use Array[@@species], always returns a base Array.
+static JSValue js_array_toSorted(JSContext *ctx, JSValueConst this_val,
+                                 int argc, JSValueConst *argv)
+{
+    JSValue arr, obj, ret, *arrp, *pval;
+    JSObject *p;
+    int64_t i, len;
+    uint32_t count32;
+    int ok;
+
+    ok = JS_IsUndefined(argv[0]) || JS_IsFunction(ctx, argv[0]);
+    if (!ok)
+        return JS_ThrowTypeError(ctx, "not a function");
+
+    ret = JS_EXCEPTION;
+    arr = JS_UNDEFINED;
+    obj = JS_ToObject(ctx, this_val);
+    if (js_get_length64(ctx, &len, obj))
+        goto exception;
+
+    arr = js_allocate_fast_array(ctx, len);
+    if (JS_IsException(arr))
+        goto exception;
+
+    if (len > 0) {
+        p = JS_VALUE_GET_OBJ(arr);
+        i = 0;
+        pval = p->u.array.u.values;
+        if (js_get_fast_array(ctx, obj, &arrp, &count32) && count32 == len) {
+            for (; i < len; i++, pval++)
+                *pval = JS_DupValue(ctx, arrp[i]);
+        } else {
+            for (; i < len; i++, pval++) {
+                if (-1 == JS_TryGetPropertyInt64(ctx, obj, i, pval)) {
+                    for (; i < len; i++, pval++)
+                        *pval = JS_UNDEFINED;
+                    goto exception;
+                }
+            }
+        }
+
+        if (JS_SetProperty(ctx, arr, JS_ATOM_length, JS_NewInt64(ctx, len)) < 0)
+            goto exception;
+    }
+
+    ret = js_array_sort(ctx, arr, argc, argv);
+    if (JS_IsException(ret))
+        goto exception;
+    JS_FreeValue(ctx, ret);
+
+    ret = arr;
+    arr = JS_UNDEFINED;
+
+exception:
+    JS_FreeValue(ctx, arr);
+    JS_FreeValue(ctx, obj);
+    return ret;
+}
+
 typedef struct JSArrayIteratorData {
     JSValue obj;
     JSIteratorKindEnum kind;
@@ -39993,6 +40289,7 @@ static const JSCFunctionListEntry js_iterator_proto_funcs[] = {
 
 static const JSCFunctionListEntry js_array_proto_funcs[] = {
     JS_CFUNC_DEF("at", 1, js_array_at ),
+    JS_CFUNC_DEF("with", 2, js_array_with ),
     JS_CFUNC_DEF("concat", 1, js_array_concat ),
     JS_CFUNC_MAGIC_DEF("every", 1, js_array_every, special_every ),
     JS_CFUNC_MAGIC_DEF("some", 1, js_array_every, special_some ),
@@ -40017,9 +40314,12 @@ static const JSCFunctionListEntry js_array_proto_funcs[] = {
     JS_CFUNC_MAGIC_DEF("shift", 0, js_array_pop, 1 ),
     JS_CFUNC_MAGIC_DEF("unshift", 1, js_array_push, 1 ),
     JS_CFUNC_DEF("reverse", 0, js_array_reverse ),
+    JS_CFUNC_DEF("toReversed", 0, js_array_toReversed ),
     JS_CFUNC_DEF("sort", 1, js_array_sort ),
+    JS_CFUNC_DEF("toSorted", 1, js_array_toSorted ),
     JS_CFUNC_MAGIC_DEF("slice", 2, js_array_slice, 0 ),
     JS_CFUNC_MAGIC_DEF("splice", 2, js_array_slice, 1 ),
+    JS_CFUNC_DEF("toSpliced", 2, js_array_toSpliced ),
     JS_CFUNC_DEF("copyWithin", 2, js_array_copyWithin ),
     JS_CFUNC_MAGIC_DEF("flatMap", 1, js_array_flatten, 1 ),
     JS_CFUNC_MAGIC_DEF("flat", 0, js_array_flatten, 0 ),
@@ -51649,6 +51949,9 @@ void JS_AddIntrinsicBaseObjects(JSContext *ctx)
             "flatMap" "\0"
             "includes" "\0"
             "keys" "\0"
+            "toReversed" "\0"
+            "toSorted" "\0"
+            "toSpliced" "\0"
             "values" "\0";
         const char *p = unscopables;
         obj1 = JS_NewObjectProto(ctx, JS_NULL);
@@ -52375,6 +52678,43 @@ static JSValue js_typed_array_at(JSContext *ctx, JSValueConst this_val,
     return JS_GetPropertyInt64(ctx, this_val, idx);
 }
 
+static JSValue js_typed_array_with(JSContext *ctx, JSValueConst this_val,
+                                   int argc, JSValueConst *argv)
+{
+    JSValue arr, val;
+    JSObject *p;
+    int64_t idx, len;
+
+    p = get_typed_array(ctx, this_val, /*is_dataview*/0);
+    if (!p)
+        return JS_EXCEPTION;
+
+    if (JS_ToInt64Sat(ctx, &idx, argv[0]))
+        return JS_EXCEPTION;
+
+    len = p->u.array.count;
+    if (idx < 0)
+        idx = len + idx;
+    if (idx < 0 || idx >= len)
+        return JS_ThrowRangeError(ctx, "out of bound");
+
+    val = JS_ToPrimitive(ctx, argv[1], HINT_NUMBER);
+    if (JS_IsException(val))
+        return JS_EXCEPTION;
+
+    arr = js_typed_array_constructor_ta(ctx, JS_UNDEFINED, this_val,
+                                        p->class_id);
+    if (JS_IsException(arr)) {
+        JS_FreeValue(ctx, val);
+        return JS_EXCEPTION;
+    }
+    if (JS_SetPropertyInt64(ctx, arr, idx, val) < 0) {
+        JS_FreeValue(ctx, arr);
+        return JS_EXCEPTION;
+    }
+    return arr;
+}
+
 static JSValue js_typed_array_set(JSContext *ctx,
                                   JSValueConst this_val,
                                   int argc, JSValueConst *argv)
@@ -53153,6 +53493,24 @@ static JSValue js_typed_array_reverse(JSContext *ctx, JSValueConst this_val,
     return JS_DupValue(ctx, this_val);
 }
 
+static JSValue js_typed_array_toReversed(JSContext *ctx, JSValueConst this_val,
+                                         int argc, JSValueConst *argv)
+{
+    JSValue arr, ret;
+    JSObject *p;
+
+    p = get_typed_array(ctx, this_val, /*is_dataview*/0);
+    if (!p)
+        return JS_EXCEPTION;
+    arr = js_typed_array_constructor_ta(ctx, JS_UNDEFINED, this_val,
+                                        p->class_id);
+    if (JS_IsException(arr))
+        return JS_EXCEPTION;
+    ret = js_typed_array_reverse(ctx, arr, argc, argv);
+    JS_FreeValue(ctx, arr);
+    return ret;
+}
+
 static JSValue js_typed_array_slice(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
 {
@@ -53556,6 +53914,24 @@ static JSValue js_typed_array_sort(JSContext *ctx, JSValueConst this_val,
     return JS_DupValue(ctx, this_val);
 }
 
+static JSValue js_typed_array_toSorted(JSContext *ctx, JSValueConst this_val,
+                                       int argc, JSValueConst *argv)
+{
+    JSValue arr, ret;
+    JSObject *p;
+
+    p = get_typed_array(ctx, this_val, /*is_dataview*/0);
+    if (!p)
+        return JS_EXCEPTION;
+    arr = js_typed_array_constructor_ta(ctx, JS_UNDEFINED, this_val,
+                                        p->class_id);
+    if (JS_IsException(arr))
+        return JS_EXCEPTION;
+    ret = js_typed_array_sort(ctx, arr, argc, argv);
+    JS_FreeValue(ctx, arr);
+    return ret;
+}
+
 static const JSCFunctionListEntry js_typed_array_base_funcs[] = {
     JS_CFUNC_DEF("from", 1, js_typed_array_from ),
     JS_CFUNC_DEF("of", 0, js_typed_array_of ),
@@ -53568,6 +53944,7 @@ static const JSCFunctionListEntry js_typed_array_base_funcs[] = {
 static const JSCFunctionListEntry js_typed_array_base_proto_funcs[] = {
     JS_CGETSET_DEF("length", js_typed_array_get_length, NULL ),
     JS_CFUNC_DEF("at", 1, js_typed_array_at ),
+    JS_CFUNC_DEF("with", 2, js_typed_array_with ),
     JS_CGETSET_MAGIC_DEF("buffer", js_typed_array_get_buffer, NULL, 0 ),
     JS_CGETSET_MAGIC_DEF("byteLength", js_typed_array_get_byteLength, NULL, 0 ),
     JS_CGETSET_MAGIC_DEF("byteOffset", js_typed_array_get_byteOffset, NULL, 0 ),
@@ -53591,9 +53968,11 @@ static const JSCFunctionListEntry js_typed_array_base_proto_funcs[] = {
     JS_CFUNC_MAGIC_DEF("findLast", 1, js_typed_array_find, special_findLast ),
     JS_CFUNC_MAGIC_DEF("findLastIndex", 1, js_typed_array_find, special_findLastIndex ),
     JS_CFUNC_DEF("reverse", 0, js_typed_array_reverse ),
+    JS_CFUNC_DEF("toReversed", 0, js_typed_array_toReversed ),
     JS_CFUNC_DEF("slice", 2, js_typed_array_slice ),
     JS_CFUNC_DEF("subarray", 2, js_typed_array_subarray ),
     JS_CFUNC_DEF("sort", 1, js_typed_array_sort ),
+    JS_CFUNC_DEF("toSorted", 1, js_typed_array_toSorted ),
     JS_CFUNC_MAGIC_DEF("join", 1, js_typed_array_join, 0 ),
     JS_CFUNC_MAGIC_DEF("toLocaleString", 0, js_typed_array_join, 1 ),
     JS_CFUNC_MAGIC_DEF("indexOf", 1, js_typed_array_indexOf, special_indexOf ),

test262.conf

@@ -73,7 +73,7 @@ Atomics
 Atomics.waitAsync=skip
 BigInt
 caller
-change-array-by-copy=skip
+change-array-by-copy
 class
 class-fields-private
 class-fields-private-in=skip