regex101: ROM naming scheme

Pro

^start of line

Group word(?'word'(?:[a-zA-Z0-9!?'"&\.,+@%~$]|(?<! )-(?! ))+)

Non-Capturing Group(?:[a-zA-Z0-9!?'"&\.,+@%~$]|(?<! )-(?! ))+

+repeats the group contents below at least once:

1st Alternative[a-zA-Z0-9!?'"&\.,+@%~$]

Character Class[a-zA-Z0-9!?'"&\.,+@%~$]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

2nd Alternative(?<! )-(?! )

Negative Lookbehind(?<! )

the literal (32₁₀ / 40₈ / 20₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Negative Lookahead(?! )

the literal (32₁₀ / 40₈ / 20₁₆)

Group words(?'words'(?&word)(?: (?&word))*?)

(?&word)calls group word as a subroutine

Non-Capturing Group(?: (?&word))*?

*?repeats the group contents below any number of times:

the literal (32₁₀ / 40₈ / 20₁₆)

(?&word)calls group word as a subroutine

Group nothe(?'nothe'(?<!, (?i:a))(?<!, (?i:the|les)))

Negative Lookbehind(?<!, (?i:a))

, the literal text ,

Group with flags gmi(?i:a)

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

athe literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

Negative Lookbehind(?<!, (?i:the|les))

, the literal text ,

Group with flags gmi(?i:the|les)

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

1st Alternativethe

thethe literal text the (case insensitive)

2nd Alternativeles

lesthe literal text les (case insensitive)

Group ver_prefix(?'ver_prefix'Rev|Proto|Alpha|Beta)

1st AlternativeRev

Revthe literal text Rev (case sensitive)

2nd AlternativeProto

Protothe literal text Proto (case sensitive)

3rd AlternativeAlpha

Alphathe literal text Alpha (case sensitive)

4th AlternativeBeta

Betathe literal text Beta (case sensitive)

Group title(?'title'(?&words)(?&nothe))

(?&words)calls group words as a subroutine

(?&nothe)calls group nothe as a subroutine

Group subtitle(?'subtitle' - (?&words))*?

*?repeats the group contents below any number of times:

- the literal text -

(?&words)calls group words as a subroutine

Group upd(?'upd' (?:Update|DLC - (?&words)))?

?repeats the group contents below at most once:

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:Update|DLC - (?&words))

Group region(?'region' $(?:(?:A|As|B|C|Ch|Nl|E|F|G|Gr|Hk|I|J|K|No|R|S|Sw|U|Uk|Tw|W))+$)?

Group version(?'version' \[(?:(?:(?&ver_prefix) )?(?:(?'_ver'[\da-zA-Z]+)(?:\.(?&_ver))+|\d\d\d\d-\d\d-\d\d(?:T\d+)?)|(?&ver_prefix)( (?:[A-Z]|\d+|early))?)\])?

Group part(?'part' $Dis(?:c|k) \d+$)?

Group language(?'language' $(?'_lang'(?:F-)?(?:Ja|En|Fr|De|Es|It|Nl|Ca|Fi|No|Sv|Da|Zh(?:-Hant|-Hans)?|Pt|Ru|Ko|Pl))(?:,?(?&_lang))*$)?

Group randomshit(?'randomshit'(?: \[DEMO\])?(?'lossy' \[LOSSY\])?(?: \[Sample\])?(?: $Promo$)?(?: $Unl$)?)

Group features(?'features' \[(?'_feat'[a-zA-Z]+)(?:, ?(?&_feat))*\])?

Group ext(?'ext'\.(?:gbc|gb|nsp|xci|(nkit\.)?rvz|gcz|wbfs|wad|gba|type|cia|3ds|nds|nes|sfc|smc|n64|z64|wux|gg|md|sms|iso|pce|chd))

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

^(?(DEFINE)(?'word'(?:[a-zA-Z0-9!?'"&\.,+@%~$]|(?<! )-(?! ))+)(?'words'(?&word)(?: (?&word))*?)(?'nothe'(?<!, (?i:a))(?<!, (?i:the|les)))(?'ver_prefix'Rev|Proto|Alpha|Beta))(?'title'(?&words)(?&nothe))(?'subtitle' - (?&words))*?(?'upd' (?:Update|DLC - (?&words)))?(?'region' \((?:(?:A|As|B|C|Ch|Nl|E|F|G|Gr|Hk|I|J|K|No|R|S|Sw|U|Uk|Tw|W))+\))?(?'version' \[(?:(?:(?&ver_prefix) )?(?:(?'_ver'[\da-zA-Z]+)(?:\.(?&_ver))+|\d\d\d\d-\d\d-\d\d(?:T\d+)?)|(?&ver_prefix)( (?:[A-Z]|\d+|early))?)\])?(?'part' \(Dis(?:c|k) \d+\))?(?'language' \((?'_lang'(?:F-)?(?:Ja|En|Fr|De|Es|It|Nl|Ca|Fi|No|Sv|Da|Zh(?:-Hant|-Hans)?|Pt|Ru|Ko|Pl))(?:,?(?&_lang))*\))?(?'randomshit'(?: \[DEMO\])?(?'lossy' \[LOSSY\])?(?: \[Sample\])?(?: \(Promo\))?(?: \(Unl\))?)(?'features' \[(?'_feat'[a-zA-Z]+)(?:, ?(?&_feat))*\])?(?'ext'\.(?:gbc|gb|nsp|xci|(nkit\.)?rvz|gcz|wbfs|wad|gba|type|cia|3ds|nds|nes|sfc|smc|n64|z64|wux|gg|md|sms|iso|pce|chd))$

New

Amazing Spider Man (UE).gb
Otto's Ottifanten - Baby Bruno's Nightmare (E) (En,Fr,De,Es).gb
Pokemon Kristall (G).gbc
A Hat in Time DLC - Nyakuza Metro [1.1.0].nsp
Pokemon Card GB2 - GR Dan Sanjou! (J).gbc
Asphalt 9 Legends [1.3.1].nsp
Animal Crossing New Horizons DLC - Special Order Ticket Pocket Camp tie-in campaign.nsp
Pokemon Pinball (E) (En,Fr,De,Es,It) [S,DMG].gbc
Arcade Hits - Moon Patrol & Spy Hunter (UE) [DMG].gbc
Daikatana (U) [Proto 2000-04-19] [DMG].gbc
Hang Time Basketball (E) (Unl).gbc
Pokemon Green (J) [1.0] (F-En).gb
LSDJ [9.2.L].gb
Keep Talking and Nobody Explodes Update [1.2.0].nsp
Sonic Mania Plus [1.0.4] (En,Ja,Fr,De,Es,It,Zh).xci
Spelunky [1.22.2a].nsp
Chrono Cross (U) (Disc 1).chd
Chrono Cross (U) (Disc 2).chd
Fear Effect 2 - Retro Helix (E) (Disc 1) (En,Fr,De).chd
Ren & Stimpy Show - Buckeroo$! (U).sfc
PGA European Tour Golf (E) [Beta B.29] (En,De).z64
007 - The World Is Not Enough (U) [Beta 21].z64
007 - The World Is Not Enough (U) [Beta 2.00].z64
Pokemon Yellow (UE) [C].gb
Shadowgate 64 - Trials of the Four Towers (U) [Beta] (En,Es).z64
Mario Kart Wii (U) (En,Fr,Es) [LOSSY].wbfs