Comments (1)
According to this website, the different RegEx engines cover different characters in the shorthand character classes:
https://www.regular-expressions.info/shorthand.html
BTW, I've bought both RegexBuddy and RegexMagic form JGS (author of the website you linked), so if you need me to test some RegExs for you I'll happily do it. Both tools have a custom engine that includes all versions of the major RegEx engines (so that you can test backward compatibility issues with any engine) plus the custom engine by JGS, which is very powerful (also documented at the website).
One of these two programs also allows debugging a RegEx to break it down into each single passage, in case you need to compare expected behaviour in your code with actual behaviour by other engines.
As for the shorthand classes to implement, it really depends on what your engine goals are — which I'm guessing is mostly oriented toward lexers creation?
I'm not quite sure that \h
and \v
would be all that useful (vertical tabs are not used much in Western languages, and \t
should suffice in place of \h
), also these tend to have different meanings across engines.
Some other useful shorthands can be found here:
- Special Characters —
\Q
...\E
for escaping literal sequences. - Non-Printable Characters —
\x
ASCII chars,\u
Unicode. - Anchors —
\A
and\Z
are very useful for lexing. - Word Boundaries — Tcl style
\m
and\M
.
I know that the above don't all qualify as characters shorthand, for some of them are more abstract in nature, but still...
from regex-engine.
Related Issues (20)
- Add support of limited repetitions
- Add escape sequence `\Q`...`\E`
- Add predefined character class `\d` (digit)
- Add predefined character class `\s` (whitespace)
- Add feature to match multiple regexes simultaneously
- Add escape sequence `\xhh` (character with hex code `hh`)
- Add escape sequence `\uhhhh` (character with hex code `hhhh`)
- Add feature to export NFA/DFA table as state diagram HOT 1
- Add support for custom character classes `[`...`]`
- Add escape sequence `\f` (form feed)
- Add predefined character class `\D` (no digit)
- Add predefined character class `\S` (no whitespace)
- Add predefined character class `\w` (word character)
- Add predefined character class `\W` (no word character)
- Add Case-Insensitive Mode
- Add feature to minimize the DFA HOT 2
- Add full support for UTF-16 / Unicode HOT 3
- Create reduced module that contains only a DFA matcher
- Add ASCII mode
- Add a `CHANGELOG.md` file to the project HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from regex-engine.