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Diffstat (limited to 'docs/content/en/functions/_common/regular-expressions.md')
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1 files changed, 12 insertions, 0 deletions
diff --git a/docs/content/en/functions/_common/regular-expressions.md b/docs/content/en/functions/_common/regular-expressions.md new file mode 100644 index 000000000..48e020ac6 --- /dev/null +++ b/docs/content/en/functions/_common/regular-expressions.md @@ -0,0 +1,12 @@ +--- +# Do not remove front matter. +--- + +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. + +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. + +[caveats]: https://swtch.com/~rsc/regexp/regexp3.html#caveats +[PCRE]: https://www.pcre.org/ +[RE2 syntax]: https://github.com/google/re2/wiki/Syntax/ +[string literal]: https://go.dev/ref/spec#String_literals |