.t

7 claimants 4 primary 2 secondary shared primary (4)

SWH popularity

From the SWH-MSR-ARV dataset (Desmazières, Di Cosmo, Lorentz, MSR 2025; file nb_extensions_alphanum.csv) — one row per (ext, year) in the full SWH archive. Case-aggregated. citation.

2.7M
total occurrences
463.1K
since 2019 (17.2%)
1970–2023
years active

Case variants in archive: .t (2.7M), .T (34.7K) — aggregated above.

Attribution status

This extension is attributed to Perl 6; Terra; TOM; Turing as primary by 4 authoritative claims.

Authoritative sources: ✓ Linguist △ Pygments · secondary ✓ Wikidata · Q2052676 △ Wikipedia · secondary

Disagree or have a correction? Open a labelling issue.

Claimants (11)

Languages that list .t among their extensions. Strength reflects whether the upstream source treated it as their primary extension.
LanguageSourceStrength
Perl 6wikidataprimary
Terralinguistprimary
TOMwikidataprimary
Turinglinguistprimary
Perllinguistsecondary
Perlpygmentssecondary
Perl 6linguistsecondary
Perl 6pygmentssecondary
Raku (programming language)pygmentssecondary
Perlwikipediaproposed
TMGwikipediaproposed

Wikidata says… (2)

File formats, image formats, audio codecs and other non-PL entities that claim .t on Wikidata (property P1195) or in the Wikipedia infobox. Source: data/derived/external_extension_index.csv. Click Use as new PL on any row to open the Add-PL form pre-filled with that entry's name, Wikipedia/Wikidata URL, and this extension — one submission creates the PL + claim.
Right entry isn't listed? Add manually ↗
FormatClass (Wikidata P31)Suggested labelMIMENotesAction
E-Tracker chiptune Q105858365
file format
file formataudio/x-modUse as new PL ↗
TADS 3 Game Q105851215
file format
file formatapplication/x-t3vm-imageUse as new PL ↗

Disambiguation rules (3)

Linguist heuristics that decide, by content, which language a .t file actually is.
RulePredictsKindPredicates (truncated)
h/linguist/.t/0Perlpredicates[{"kind": "not_any", "regexes": ["^\\s*use\\s+v6\\b"]}, {"kind": "any", "regexes": ["\\buse\\s+(?:strict\\b|v?5\\b)", "^\\s*use\\s+(?:constant|overload)\\b", "^\\s*(?:\\*|(?:our\\s*)?@)EXPORT\\s*=", "
h/linguist/.t/1Perl 6predicates[{"kind": "any", "regexes": ["^\\s*(?:use\\s+v6\\b|\\bmodule\\b|\\bmy\\s+class\\b)"]}]
h/linguist/.t/2Turingpredicates[{"kind": "any", "regexes": ["^\\s*%[ \\t]+|^\\s*var\\s+\\w+(\\s*:\\s*\\w+)?\\s*:=\\s*\\w+"]}]

SWH-mined examples (2)

Real archived programs with this extension, byte-verified against the SWH archive. Useful for deciding what this extension actually is when the attribution is uncertain.
resultset_overload.t · 543 B · seen 1858× in SWH
predicted: Perl via heuristic
swh:1:cnt:c5ecce87432c6b1e8465269cb9b15902fe0dc302;origin=https://github.com/st3fan/osx-10.9;anchor=swh:1:rev:9f8135f87c2ba27b1e76a514464b823812effd45;path=/CPANInternal-140/DBIx-Class/t/resultset_overload.t
Open in SWH · Raw bytes
82cascade_copy.t · 742 B · seen 1360× in SWH
predicted: Perl via heuristic
swh:1:cnt:5f8a542ec72e10adf0a8a65206139081baffdc20;origin=https://github.com/st3fan/osx-10.9;anchor=swh:1:rev:9f8135f87c2ba27b1e76a514464b823812effd45;path=/CPANInternal-140/DBIx-Class/t/82cascade_copy.t
Open in SWH · Raw bytes
Request more SWH-mined examples
If the examples above don't disambiguate what .t is, request a fresh mining run.
(or open the pre-filled issue directly)