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`.cc`

2 claimants 1 primary 1 secondary unambiguous primary

SWH popularity

Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.

38.2M

total files

12.3M

first seen 2021–2025 (32.2%)

2018

median year (half its files since)

Case variants in archive: .cc (38.1M), .CC (9.1K), .cC (18), .Cc (11) — aggregated above.

Attribution status

This extension is attributed to C++ as primary by 1 authoritative claim.

Authoritative sources: △ Linguist · secondary △ Pygments · secondary ✓ Wikidata · Q2407 ✗ Wikipedia · no claim

Disagree or have a correction? Open a labelling issue.

Claimants (4)

Languages that list .cc among their extensions. Strength reflects whether the upstream source treated it as their primary extension.

Language	Source	Strength
C++	wikidata	primary
C++	linguist	secondary
C++	pygments	secondary
cpp	pygments	secondary

Wikidata says… (2)

File formats, image formats, audio codecs and other non-PL entities that claim .cc 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 ↗

Format	Class (Wikidata `P31`)	Suggested label	MIME	Notes	Action
class implementation file Q5128020 file containing source code that implements methods declared in a corresponding header file		—	`—`	—	Use as new PL ↗
C++ source code file Q111417227 file format	file format	—	`—`	—	Use as new PL ↗

SWH-mined examples (2)

Real archived programs with this extension, byte-verified against the SWH archive, grouped by predicted language and by how the prediction was made. Useful for deciding what this extension actually is when the attribution is uncertain.

unclassified (2) — 2 via fallback

memory_details_linux.cc · 4401 B · seen 51041× in SWH

predicted: unclassified via fallback

swh:1:cnt:7f699d1e71269071805d76fe3048e84ad696cd30;origin=https://github.com/kiwibrowser/src.next;anchor=swh:1:rev:b2a61e552c940b89d2ae504de720832780f4e7ea;path=/chrome/browser/memory_details_linux.cc

Open in SWH · Raw bytes

chrome_origin_trials_browsertest.cc · 6466 B · seen 24045× in SWH

predicted: unclassified via fallback

swh:1:cnt:32302aa8ac24ac5d0253b02054597f70a5aaa8ff;origin=https://github.com/kiwibrowser/src.next;anchor=swh:1:rev:b2a61e552c940b89d2ae504de720832780f4e7ea;path=/chrome/browser/chrome_origin_trials_browsertest.cc

Open in SWH · Raw bytes