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# stri_unescape_unicode: Un-escape All Escape Sequences

## Description

Un-escapes all known escape sequences.

## Usage

    stri_unescape_unicode(str)

## Arguments

`str` | character vector

## Details

Uses ICU’s facilities to un-escape Unicode character sequences.

The following escape sequences are recognized: `\a`, `\b`, `\t`, `\n`, `\v`, `\?`, `\e`, `\f`, `\r`, `\"`, `\'`, `\\`, `\uXXXX` (4 hex digits), `\UXXXXXXXX` (8 hex digits), `\xXX` (1-2 hex digits), `\ooo` (1-3 octal digits), `\cX` (control-X; X is masked with 0x1F). For `\xXX` and `\ooo`, beware of non-valid UTF-8 byte sequences.

Note that some versions of R on Windows cannot handle characters defined with `\UXXXXXXXX`.

## Value

Returns a character vector. If an escape sequence is ill-formed, the result will be `NA` and a warning will be given.

## Author(s)

Marek Gagolewski and other contributors

## See Also

The official online manual of stringi at https://stringi.gagolewski.com/

Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, doi:10.18637/jss.v103.i02

Other escape: `stri_escape_unicode()`

## Examples

    stri_unescape_unicode('a\\u0105!\\u0032\\n')
    ## [1] "aą!2\n"