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13 lines
691 B
Markdown
13 lines
691 B
Markdown
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---
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# Do not remove front matter.
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---
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When specifying the regular expression, use a raw [string literal] (backticks) instead of an interpreted string literal (double quotes) to simplify the syntax. With an interpreted string literal you must escape backslashes.
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Go's regular expression package implements the [RE2 syntax]. The RE2 syntax is a subset of that accepted by [PCRE], roughly speaking, and with various [caveats]. Note that the RE2 `\C` escape sequence is not supported.
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[caveats]: https://swtch.com/~rsc/regexp/regexp3.html#caveats
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[PCRE]: https://www.pcre.org/
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[RE2 syntax]: https://github.com/google/re2/wiki/Syntax/
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[string literal]: https://go.dev/ref/spec#String_literals
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