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One area where Emacs’s regexp engine does shine is its support for match constructs and Unicode support:
| Constructs | Description |
|---|---|
| ‘\<’, ‘\>’ | Matches beginning and end of word |
| ‘\_<’, ‘\_>’ | Matches beginning and end of symbol |
| ‘\scode’ | Matches any character whose syntax table code is code |
| ‘\Scode’ | Matches any character whose syntax table code is not code |
Table 8.1: Match Constructs and Unicode Support