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Correct doc for \U escape sequence under Base/Strings/unescape_string #33285

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Sep 17, 2019
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Correct doc for \U escape sequence under Base/Strings/unescape_string #33285

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Correct doc for \U escape sequence 
The `\U` escape sequence, which can take 1 - 8 hex digits, was presented as a duplicate of the `\u` escape sequence, which can only take 1 - 4 hex digits. I separated `\u` from `\U` so it would be easier to clarify the distinction between them. Also, added "max value" for `\U` since unlike `\x`, octal, and `\u` sequences, the max value for `\U` is _not_ the max of all 8 hex digits (i.e. `ffffffff` ).
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@srutzky
srutzky authored Sep 16, 2019
commit 5c71848ea95eb8f26d3d20b1433955239a0bd6df
3 changes: 2 additions & 1 deletion base/strings/io.jl
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Expand Up @@ -382,7 +382,8 @@ The following escape sequences are recognised:
- Escaped backslash (`\\\\`)
- Escaped double-quote (`\\\"`)
- Standard C escape sequences (`\\a`, `\\b`, `\\t`, `\\n`, `\\v`, `\\f`, `\\r`, `\\e`)
- Unicode code points (`\\u` or `\\U` prefixes with 1-4 trailing hex digits)
- Unicode BMP code points (`\\u` with 1-4 trailing hex digits)
- All Unicode code points (`\\U` with 1-8 trailing hex digits; max value = 0010ffff)
- Hex bytes (`\\x` with 1-2 trailing hex digits)
- Octal bytes (`\\` with 1-3 trailing octal digits)

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