Google Code Search
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|---|---|
| Developer(s) | |
| Operating system | Any (web based application) |
| Type | Code search engine |
| Website | http://www.google.com/codesearch |
Google Code Search is a free beta product from Google which debuted in Google Labs on October 5, 2006 allowing web users to search for open-source code on the Internet.
Features include the ability to search using operators. These are lang:, package:, license: and file:.
The code available for searching is in various formats including tar.gz, .tar.bz2, .tar, and .zip, CVS and Subversion repositories as well as snippets from HTML pages such as Wikipedia itself.
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Regular expression engine
The site allows the use of regular expressions in queries, which is not offered by any other search engine for code.[citation needed] This makes it resemble grep, but over the world's public code. The methodology employed has not been disclosed by Google, but appears to have combined precomputed indices with a POSIX compliant regular expression engine.[citation needed][original research?]
Google Code Search supports POSIX extended regular expression syntax, excluding back-references, collating elements, and collation classes.[1]
Supported languages
The list of officially supported languages is constantly changing. The following list is correct as of 31 December 2010[update]:[2]
Languages not officially supported can still be searched for using the file: operator to match the common file extensions for the language.
