Implement RegExp flag accessors

[HalidOdat]

It changes the following:

• Implement RegExp.prototype.global accessor
• Implement RegExp.prototype.multiline accessor
• Implement RegExp.prototype.dotAll accessor
• Implement RegExp.prototype.ignoreCase accessor
• Implement RegExp.prototype.unicode accessor
• Implement RegExp.prototype.sticky accessor
• Implement RegExp.prototype.flags accessor

[github-actions]

Test262 conformance changes:

Test result	master count	PR count	difference
Total	78,497	78,497	0
Passed	25,537	25,679	+142
Ignored	15,587	15,587	0
Failed	37,373	37,231	-142
Panics	13	12	-1
Conformance	32.53	32.71	+0.18%

[github-actions]

Benchmark for 9b6ea3d

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	357.1±11.18ns	358.1±9.33ns	-0.28%
Arithmetic operations (Full)	254.2±5.67µs	250.0±4.75µs	+1.68%
Array access (Execution)	6.0±0.13µs	5.9±0.19µs	+1.69%
Array access (Full)	269.1±7.46µs	267.7±3.33µs	+0.52%
Array creation (Execution)	2.8±0.09ms	2.9±0.09ms	-3.45%
Array creation (Full)	3.0±0.08ms	3.2±0.06ms	-6.25%
Array pop (Execution)	900.4±19.22µs	894.0±24.06µs	+0.72%
Array pop (Full)	1335.6±37.15µs	1386.6±24.84µs	-3.68%
Boolean Object Access (Execution)	5.2±0.14µs	5.4±0.14µs	-3.70%
Boolean Object Access (Full)	272.0±4.68µs	268.4±1.23µs	+1.34%
Clean js (Execution)	644.2±16.88µs	664.6±9.10µs	-3.07%
Clean js (Full)	947.3±18.38µs	960.3±10.76µs	-1.35%
Clean js (Parser)	42.8±0.71µs	43.4±0.49µs	-1.38%
Create Realm	444.9±12.93ns	431.5±10.84ns	+3.11%
Dynamic Object Property Access (Execution)	4.7±0.14µs	4.9±0.12µs	-4.08%
Dynamic Object Property Access (Full)	274.9±4.32µs	270.6±2.94µs	+1.59%
Expression (Parser)	6.9±0.11µs	7.0±0.07µs	-1.43%
Fibonacci (Execution)	760.0±12.21µs	746.7±17.67µs	+1.78%
Fibonacci (Full)	1028.8±28.65µs	1047.6±7.62µs	-1.79%
For loop (Execution)	21.2±0.43µs	20.4±0.53µs	+3.92%
For loop (Full)	278.8±7.32µs	286.2±2.74µs	-2.59%
For loop (Parser)	20.4±0.33µs	20.6±0.54µs	-0.97%
Goal Symbols (Parser)	14.1±0.33µs	14.5±0.27µs	-2.76%
Hello World (Parser)	3.9±0.06µs	4.0±0.02µs	-2.50%
Long file (Parser)	781.9±12.36ns	776.3±11.13ns	+0.72%
Mini js (Execution)	580.7±15.65µs	599.5±8.78µs	-3.14%
Mini js (Full)	873.5±16.62µs	885.0±8.07µs	-1.30%
Mini js (Parser)	37.7±0.70µs	38.3±0.18µs	-1.57%
Number Object Access (Execution)	4.0±0.10µs	4.1±0.10µs	-2.44%
Number Object Access (Full)	270.6±5.66µs	264.9±1.81µs	+2.15%
Object Creation (Execution)	4.0±0.13µs	4.0±0.11µs	0.00%
Object Creation (Full)	259.8±5.30µs	263.5±4.17µs	-1.40%
RegExp (Execution)	9.1±0.35µs	9.4±0.29µs	-3.19%
RegExp (Full)	277.4±7.41µs	271.7±2.43µs	+2.10%
RegExp Literal (Execution)	10.5±0.30µs	10.9±0.25µs	-3.67%
RegExp Literal (Full)	283.0±4.11µs	270.8±4.59µs	+4.51%
RegExp Literal Creation (Execution)	9.1±0.70µs	9.6±0.36µs	-5.21%
RegExp Literal Creation (Full)	270.8±6.17µs	265.5±2.46µs	+2.00%
Static Object Property Access (Execution)	4.4±0.16µs	4.3±0.13µs	+2.33%
Static Object Property Access (Full)	263.5±7.44µs	276.1±14.74µs	-4.56%
String Object Access (Execution)	7.2±0.20µs	7.4±0.11µs	-2.70%
String Object Access (Full)	280.1±3.57µs	271.3±3.97µs	+3.24%
String comparison (Execution)	6.2±0.18µs	6.3±0.18µs	-1.59%
String comparison (Full)	274.6±7.04µs	271.7±2.36µs	+1.07%
String concatenation (Execution)	5.0±0.17µs	5.0±0.12µs	0.00%
String concatenation (Full)	268.4±4.61µs	259.0±5.32µs	+3.63%
String copy (Execution)	3.7±0.10µs	3.9±0.08µs	-5.13%
String copy (Full)	257.8±8.09µs	255.7±2.11µs	+0.82%
Symbols (Execution)	3.3±0.07µs	3.2±0.08µs	+3.12%
Symbols (Full)	248.8±7.35µs	247.7±8.37µs	+0.44%

[RageKnify]

Assume the panics are the 2 ghosts that keep showing up in CI.
edit: panics disappeared...

[github-actions]

Benchmark for 05b5601

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	338.5±14.31ns	320.0±7.08ns	+5.78%
Arithmetic operations (Full)	242.1±8.00µs	254.9±9.36µs	-5.02%
Array access (Execution)	5.9±0.14µs	6.1±0.34µs	-3.28%
Array access (Full)	277.2±20.86µs	254.4±16.79µs	+8.96%
Array creation (Execution)	2.5±0.05ms	2.6±0.09ms	-3.85%
Array creation (Full)	2.8±0.11ms	2.8±0.06ms	0.00%
Array pop (Execution)	803.7±20.70µs	842.4±34.75µs	-4.59%
Array pop (Full)	1308.4±68.51µs	1257.7±53.67µs	+4.03%
Boolean Object Access (Execution)	5.2±0.27µs	4.8±0.21µs	+8.33%
Boolean Object Access (Full)	277.1±17.22µs	261.6±12.59µs	+5.93%
Clean js (Execution)	629.4±21.73µs	619.0±29.40µs	+1.68%
Clean js (Full)	876.3±31.60µs	929.4±36.69µs	-5.71%
Clean js (Parser)	38.7±1.16µs	40.6±2.23µs	-4.68%
Create Realm	404.5±23.24ns	423.3±16.75ns	-4.44%
Dynamic Object Property Access (Execution)	5.1±0.24µs	5.4±0.37µs	-5.56%
Dynamic Object Property Access (Full)	274.1±13.47µs	250.7±3.90µs	+9.33%
Expression (Parser)	5.9±0.19µs	6.3±0.26µs	-6.35%
Fibonacci (Execution)	787.6±18.69µs	808.2±23.37µs	-2.55%
Fibonacci (Full)	1099.1±41.22µs	996.1±20.98µs	+10.34%
For loop (Execution)	21.1±1.24µs	21.1±0.71µs	0.00%
For loop (Full)	290.1±9.80µs	267.8±4.20µs	+8.33%
For loop (Parser)	18.0±0.78µs	19.4±0.97µs	-7.22%
Goal Symbols (Parser)	12.8±0.55µs	13.5±0.46µs	-5.19%
Hello World (Parser)	3.4±0.10µs	3.6±0.10µs	-5.56%
Long file (Parser)	719.5±33.45ns	840.3±110.15ns	-14.38%
Mini js (Execution)	555.0±21.25µs	540.8±9.38µs	+2.63%
Mini js (Full)	811.3±13.09µs	862.6±34.03µs	-5.95%
Mini js (Parser)	34.0±5.06µs	37.1±1.36µs	-8.36%
Number Object Access (Execution)	4.2±0.23µs	3.8±0.18µs	+10.53%
Number Object Access (Full)	260.4±11.35µs	264.3±14.25µs	-1.48%
Object Creation (Execution)	4.2±0.10µs	4.3±0.24µs	-2.33%
Object Creation (Full)	265.2±8.71µs	248.6±6.80µs	+6.68%
RegExp (Execution)	10.4±0.31µs	10.2±0.31µs	+1.96%
RegExp (Full)	270.1±9.02µs	258.8±9.44µs	+4.37%
RegExp Literal (Execution)	10.9±0.46µs	10.3±0.48µs	+5.83%
RegExp Literal (Full)	287.3±25.81µs	261.7±5.40µs	+9.78%
RegExp Literal Creation (Execution)	9.3±0.58µs	9.4±0.56µs	-1.06%
RegExp Literal Creation (Full)	268.4±12.64µs	249.3±3.44µs	+7.66%
Static Object Property Access (Execution)	4.6±0.20µs	4.6±0.25µs	0.00%
Static Object Property Access (Full)	275.6±18.18µs	248.4±8.59µs	+10.95%
String Object Access (Execution)	7.2±0.23µs	6.7±0.15µs	+7.46%
String Object Access (Full)	287.7±14.46µs	266.9±20.89µs	+7.79%
String comparison (Execution)	6.4±0.22µs	6.2±0.14µs	+3.23%
String comparison (Full)	274.2±14.68µs	268.5±17.85µs	+2.12%
String concatenation (Execution)	5.3±0.19µs	5.0±0.15µs	+6.00%
String concatenation (Full)	264.1±10.20µs	256.4±11.24µs	+3.00%
String copy (Execution)	4.3±0.43µs	3.8±0.11µs	+13.16%
String copy (Full)	256.5±9.49µs	254.0±8.43µs	+0.98%
Symbols (Execution)	3.3±0.10µs	3.4±0.16µs	-2.94%
Symbols (Full)	247.9±9.17µs	229.0±5.60µs	+8.25%

[Razican]

Looks good, just noticed a couple of things that might require a small fix.

[github-actions]

Benchmark for cb36796

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	382.8±21.34ns	369.1±0.19ns	+3.71%
Arithmetic operations (Full)	256.0±0.38µs	247.5±0.61µs	+3.43%
Array access (Execution)	6.1±0.01µs	6.2±0.02µs	-1.61%
Array access (Full)	279.5±0.45µs	268.4±0.66µs	+4.14%
Array creation (Execution)	2.8±0.00ms	2.9±0.12ms	-3.45%
Array creation (Full)	3.2±0.00ms	3.2±0.00ms	0.00%
Array pop (Execution)	909.9±18.93µs	915.5±3.17µs	-0.61%
Array pop (Full)	1409.6±2.64µs	1459.6±74.56µs	-3.43%
Boolean Object Access (Execution)	5.3±0.04µs	5.4±0.24µs	-1.85%
Boolean Object Access (Full)	274.8±0.38µs	265.2±0.52µs	+3.62%
Clean js (Execution)	663.9±3.58µs	661.0±3.42µs	+0.44%
Clean js (Full)	965.6±3.94µs	960.9±6.36µs	+0.49%
Clean js (Parser)	40.6±0.04µs	40.7±0.05µs	-0.25%
Create Realm	450.6±0.30ns	434.1±0.42ns	+3.80%
Dynamic Object Property Access (Execution)	5.2±0.03µs	5.1±0.01µs	+1.96%
Dynamic Object Property Access (Full)	276.4±0.69µs	265.8±0.80µs	+3.99%
Expression (Parser)	7.0±0.18µs	7.0±0.49µs	0.00%
Fibonacci (Execution)	783.0±1.17µs	775.6±2.28µs	+0.95%
Fibonacci (Full)	1078.1±1.24µs	1113.8±62.24µs	-3.21%
For loop (Execution)	22.0±0.11µs	22.4±0.11µs	-1.79%
For loop (Full)	294.0±0.32µs	289.2±0.94µs	+1.66%
For loop (Parser)	19.9±0.23µs	19.7±0.03µs	+1.02%
Goal Symbols (Parser)	13.9±0.02µs	14.0±0.02µs	-0.71%
Hello World (Parser)	3.8±0.02µs	3.8±0.01µs	0.00%
Long file (Parser)	796.7±0.67ns	789.2±0.61ns	+0.95%
Mini js (Execution)	596.9±3.44µs	595.2±3.15µs	+0.29%
Mini js (Full)	931.7±33.78µs	891.2±3.67µs	+4.54%
Mini js (Parser)	35.5±0.04µs	35.6±0.04µs	-0.28%
Number Object Access (Execution)	4.3±0.17µs	4.2±0.02µs	+2.38%
Number Object Access (Full)	270.9±0.62µs	259.2±0.32µs	+4.51%
Object Creation (Execution)	4.3±0.02µs	4.3±0.02µs	0.00%
Object Creation (Full)	285.4±12.97µs	263.9±0.55µs	+8.15%
RegExp (Execution)	10.8±0.05µs	11.7±0.03µs	-7.69%
RegExp (Full)	280.2±1.26µs	270.0±1.35µs	+3.78%
RegExp Literal (Execution)	10.8±0.05µs	11.7±0.03µs	-7.69%
RegExp Literal (Full)	284.4±0.54µs	275.6±0.52µs	+3.19%
RegExp Literal Creation (Execution)	9.5±0.02µs	10.4±0.02µs	-8.65%
RegExp Literal Creation (Full)	276.9±0.62µs	264.6±1.35µs	+4.65%
Static Object Property Access (Execution)	4.6±0.02µs	4.5±0.01µs	+2.22%
Static Object Property Access (Full)	275.0±2.94µs	264.3±0.40µs	+4.05%
String Object Access (Execution)	7.2±0.02µs	7.8±0.63µs	-7.69%
String Object Access (Full)	279.1±0.50µs	270.5±0.27µs	+3.18%
String comparison (Execution)	6.6±0.03µs	6.4±0.03µs	+3.12%
String comparison (Full)	275.7±0.73µs	268.0±0.57µs	+2.87%
String concatenation (Execution)	5.3±0.09µs	5.4±0.02µs	-1.85%
String concatenation (Full)	269.1±0.89µs	258.2±0.55µs	+4.22%
String copy (Execution)	3.9±0.01µs	4.1±0.14µs	-4.88%
String copy (Full)	264.9±0.90µs	251.2±0.51µs	+5.45%
Symbols (Execution)	3.6±0.32µs	3.4±0.01µs	+5.88%
Symbols (Full)	262.4±6.13µs	256.4±14.65µs	+2.34%