Rockingcool/kleingrep
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Updated documentation to include backreferences

Browse Source
This commit is contained in:
Aadhavan Srinivasan
2025-02-12 07:50:24 -05:00
parent 81b8b1b11c
commit 2e47c631bb
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
regex/doc.go
View File

@@ -18,7 +18,7 @@ Single characters:
[^abc] Negated character class - match any character except a, b and c
[^a-z] Negated character range - do not match any character from a to z
\[ Match a literal '['. Backslashes can escape any character with special meaning, including another backslash.
\452 Match the character with the octal value 452 (up to 3 digits)
\0452 Match the character with the octal value 452 (up to 4 digits, first digit must be 0)
\xFF Match the character with the hex value FF (exactly 2 characters)
\x{0000FF} Match the character with the hex value 0000FF (exactly 6 characters)
\n Newline
@@ -93,6 +93,10 @@ Lookarounds:
(?<=x)y Positive lookbehind - Match y if preceded by x
(?<!x)y Negative lookbehind - Match y if NOT preceded by x
Backreferences:
(xy)\1 Match 'xy' followed by the text most recently captured by group 1 (in this case, 'xy')
Numeric ranges:
<x-y> Match any number from x to y (inclusive) (x and y must be positive numbers)
@@ -156,6 +160,7 @@ The following features from [regexp] are (currently) NOT supported:
The following features are not available in [regexp], but are supported in my engine:
1. Lookarounds
2. Numeric ranges
3. Backreferences
I hope to shorten the first list, and expand the second.
*/