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To extract the next token in the input stream, Lexer::scan_token() finds the start of the token by skipping whitespace, then consumes characters belonging to the token until it encounters a non-token character, such as an operator, punctuation, or whitespace. In the case of an operator or punctuation which ends a token, before returning the just-scanned token, it pushes that operator or punctuation character back onto the input stream to ensure that it will be the first character consumed by the next call to scan_token(). However, scan_token() is intentionally lax when whitespace ends a token; it doesn't bother pushing the whitespace character back onto the token stream since it knows that the next call to scan_token() will, as its first step, skip over whitespace anyhow when looking for the start of the token. Although such laxity is harmless for the proper functioning of the lexical analyzer, it does make it difficult to precisely identify the token's end position in the input stream. Accurate token position information may be desirable, for instance, to annotate problems or highlight other interesting facets of the input found during the parsing phase. To accommodate such possibilities, tighten scan_token() by making it push the token-ending whitespace character back onto the input stream, just as it does for other token-ending characters. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Taylor Blau <me@ttaylorr.com>
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
Please read the file INSTALL for installation instructions.
Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.
See Documentation/gittutorial.txt to get started, then see
Documentation/giteveryday.txt for a useful minimum set of commands, and
Documentation/git-<commandname>.txt for documentation of each command.
If git has been correctly installed, then the tutorial can also be
read with man gittutorial or git help tutorial, and the
documentation of each command with man git-<commandname> or git help <commandname>.
CVS users may also want to read Documentation/gitcvs-migration.txt
(man gitcvs-migration or git help cvs-migration if git is
installed).
The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).
Those wishing to help with error message, usage and informational message
string translations (localization l10) should see po/README.md
(a po file is a Portable Object file that holds the translations).
To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org (not the Git list). The mailing list archives are available at https://lore.kernel.org/git/, http://marc.info/?l=git and other archival sites.
Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.
The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.
The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):
- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks