Implement Object.assign( target, ...sources )

[HalidOdat]

No description provided.

[github-actions]

Test262 conformance changes:

Test result	master count	PR count	difference
Total	78,497	78,497	0
Passed	25,529	25,555	+26
Ignored	15,587	15,587	0
Failed	37,381	37,355	-26
Panics	14	13	-1
Conformance	32.52	32.56	+0.03%

[github-actions]

Benchmark for 33dcee8

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	365.0±28.07ns	387.7±18.48ns	-5.86%
Arithmetic operations (Full)	270.2±13.92µs	275.9±20.69µs	-2.07%
Array access (Execution)	7.2±0.37µs	6.9±0.33µs	+4.35%
Array access (Full)	298.6±19.65µs	305.4±19.85µs	-2.23%
Array creation (Execution)	2.9±0.14ms	2.9±0.13ms	0.00%
Array creation (Full)	3.0±0.17ms	3.1±0.17ms	-3.23%
Array pop (Execution)	916.2±41.18µs	907.4±47.28µs	+0.97%
Array pop (Full)	1405.4±70.50µs	1409.1±88.79µs	-0.26%
Boolean Object Access (Execution)	5.4±0.34µs	5.5±0.24µs	-1.82%
Boolean Object Access (Full)	297.1±24.12µs	289.9±18.25µs	+2.48%
Clean js (Execution)	688.9±36.52µs	685.3±46.91µs	+0.53%
Clean js (Full)	979.1±54.90µs	986.3±44.36µs	-0.73%
Clean js (Parser)	41.3±2.67µs	41.4±3.25µs	-0.24%
Create Realm	443.4±21.63ns	458.6±42.75ns	-3.31%
Dynamic Object Property Access (Execution)	5.8±0.32µs	5.8±0.37µs	0.00%
Dynamic Object Property Access (Full)	302.8±23.74µs	297.4±15.08µs	+1.82%
Expression (Parser)	6.8±0.58µs	6.8±0.45µs	0.00%
Fibonacci (Execution)	943.9±72.41µs	943.4±51.07µs	+0.05%
Fibonacci (Full)	1159.4±52.42µs	1119.3±73.41µs	+3.58%
For loop (Execution)	23.8±1.38µs	24.5±1.68µs	-2.86%
For loop (Full)	311.6±18.38µs	301.5±15.94µs	+3.35%
For loop (Parser)	19.4±1.91µs	20.1±1.25µs	-3.48%
Goal Symbols (Parser)	14.0±1.11µs	13.6±0.86µs	+2.94%
Hello World (Parser)	3.6±0.21µs	3.7±0.21µs	-2.70%
Long file (Parser)	791.8±37.45ns	778.7±80.33ns	+1.68%
Mini js (Execution)	613.6±25.89µs	635.6±39.26µs	-3.46%
Mini js (Full)	897.3±55.89µs	929.7±49.87µs	-3.48%
Mini js (Parser)	35.6±2.67µs	35.5±2.70µs	+0.28%
Number Object Access (Execution)	4.3±0.30µs	4.3±0.46µs	0.00%
Number Object Access (Full)	287.8±14.51µs	280.1±17.59µs	+2.75%
Object Creation (Execution)	4.8±0.24µs	4.8±0.27µs	0.00%
Object Creation (Full)	295.1±21.49µs	296.3±17.67µs	-0.40%
RegExp (Execution)	11.7±0.64µs	11.9±0.69µs	-1.68%
RegExp (Full)	311.6±42.77µs	294.6±18.18µs	+5.77%
RegExp Literal (Execution)	11.7±0.73µs	12.4±0.95µs	-5.65%
RegExp Literal (Full)	308.8±18.63µs	305.5±21.47µs	+1.08%
RegExp Literal Creation (Execution)	10.6±1.07µs	10.5±0.50µs	+0.95%
RegExp Literal Creation (Full)	298.1±24.54µs	297.9±30.38µs	+0.07%
Static Object Property Access (Execution)	5.1±0.43µs	5.1±0.25µs	0.00%
Static Object Property Access (Full)	299.0±23.41µs	295.7±20.26µs	+1.12%
String Object Access (Execution)	7.7±0.46µs	8.2±0.83µs	-6.10%
String Object Access (Full)	302.2±21.31µs	293.6±50.38µs	+2.93%
String comparison (Execution)	7.0±0.38µs	7.1±0.35µs	-1.41%
String comparison (Full)	297.3±17.16µs	287.4±15.44µs	+3.44%
String concatenation (Execution)	5.8±0.40µs	6.3±0.70µs	-7.94%
String concatenation (Full)	300.6±16.24µs	291.8±14.93µs	+3.02%
String copy (Execution)	4.4±0.23µs	4.3±0.23µs	+2.33%
String copy (Full)	284.1±19.00µs	277.2±13.74µs	+2.49%
Symbols (Execution)	3.8±0.21µs	3.8±0.29µs	0.00%
Symbols (Full)	271.8±16.29µs	275.3±12.37µs	-1.27%

[RageKnify]

Code looks fine, but it'd be nice to have the usual doc comment pointing to the spec and to MDN.
The function above it, property_is_enumerable is also missing it, it'd be nice if you could do that too.

[github-actions]

Benchmark for b667a76

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	361.4±11.70ns	365.6±6.25ns	-1.15%
Arithmetic operations (Full)	242.2±5.22µs	247.0±3.15µs	-1.94%
Array access (Execution)	6.0±0.17µs	6.1±0.13µs	-1.64%
Array access (Full)	260.0±9.08µs	265.3±4.04µs	-2.00%
Array creation (Execution)	2.7±0.09ms	2.8±0.05ms	-3.57%
Array creation (Full)	3.1±0.10ms	3.2±0.05ms	-3.13%
Array pop (Execution)	879.7±21.70µs	897.1±13.89µs	-1.94%
Array pop (Full)	1359.5±48.87µs	1385.7±17.19µs	-1.89%
Boolean Object Access (Execution)	5.1±0.19µs	5.2±0.09µs	-1.92%
Boolean Object Access (Full)	261.6±6.43µs	261.8±4.63µs	-0.08%
Clean js (Execution)	651.0±14.96µs	660.5±8.38µs	-1.44%
Clean js (Full)	945.9±17.94µs	959.8±10.45µs	-1.45%
Clean js (Parser)	39.6±0.87µs	40.7±0.31µs	-2.70%
Create Realm	431.1±11.75ns	427.0±10.32ns	+0.96%
Dynamic Object Property Access (Execution)	5.0±0.13µs	5.1±0.05µs	-1.96%
Dynamic Object Property Access (Full)	264.5±7.02µs	262.8±3.84µs	+0.65%
Expression (Parser)	6.6±0.19µs	6.7±0.12µs	-1.49%
Fibonacci (Execution)	755.9±24.00µs	764.1±16.99µs	-1.07%
Fibonacci (Full)	1014.0±29.60µs	1044.5±17.58µs	-2.92%
For loop (Execution)	21.9±0.50µs	21.9±0.74µs	0.00%
For loop (Full)	274.5±9.59µs	282.6±4.77µs	-2.87%
For loop (Parser)	19.5±0.40µs	19.7±0.19µs	-1.02%
Goal Symbols (Parser)	13.6±0.33µs	13.7±0.23µs	-0.73%
Hello World (Parser)	3.7±0.09µs	3.8±0.04µs	-2.63%
Long file (Parser)	773.7±13.97ns	781.7±15.74ns	-1.02%
Mini js (Execution)	581.1±18.97µs	585.6±13.64µs	-0.77%
Mini js (Full)	881.6±13.10µs	887.3±7.76µs	-0.64%
Mini js (Parser)	35.0±1.14µs	35.6±0.32µs	-1.69%
Number Object Access (Execution)	4.0±0.11µs	4.1±0.07µs	-2.44%
Number Object Access (Full)	258.0±6.73µs	258.3±4.73µs	-0.12%
Object Creation (Execution)	4.1±0.16µs	4.3±0.04µs	-4.65%
Object Creation (Full)	256.6±7.78µs	259.0±4.45µs	-0.93%
RegExp (Execution)	10.7±0.20µs	11.7±0.13µs	-8.55%
RegExp (Full)	268.8±7.47µs	271.2±4.65µs	-0.88%
RegExp Literal (Execution)	10.5±0.29µs	11.7±0.10µs	-10.26%
RegExp Literal (Full)	267.6±7.46µs	273.0±3.31µs	-1.98%
RegExp Literal Creation (Execution)	9.2±0.24µs	10.4±0.12µs	-11.54%
RegExp Literal Creation (Full)	268.0±5.38µs	266.7±6.67µs	+0.49%
Static Object Property Access (Execution)	4.4±0.13µs	4.6±0.04µs	-4.35%
Static Object Property Access (Full)	262.0±6.81µs	260.9±3.74µs	+0.42%
String Object Access (Execution)	7.1±0.19µs	7.4±0.15µs	-4.05%
String Object Access (Full)	263.8±4.30µs	267.2±6.16µs	-1.27%
String comparison (Execution)	6.4±0.19µs	6.6±0.07µs	-3.03%
String comparison (Full)	266.1±3.68µs	268.7±3.00µs	-0.97%
String concatenation (Execution)	5.3±0.15µs	5.3±0.06µs	0.00%
String concatenation (Full)	256.2±5.76µs	261.6±2.13µs	-2.06%
String copy (Execution)	3.8±0.10µs	3.9±0.04µs	-2.56%
String copy (Full)	251.1±6.39µs	253.1±2.99µs	-0.79%
Symbols (Execution)	3.3±0.08µs	3.3±0.09µs	0.00%
Symbols (Full)	238.2±7.18µs	242.5±3.99µs	-1.77%

[Razican]

I think there is a potential small bug when the function is called with no arguments, but let me know if it's not the case.