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Doc: clarification on regexes and encodings

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* doc/ref/api-regex.texi: make it more obviously clear that regexp
  matching supports only characters supported by the locale encoding.
This commit is contained in:
Jean Abou Samra 2022-12-11 12:28:02 +01:00 • committed by Arne Babenhauserheide
parent 7d5ab8fa40
commit ff165ec904
1 changed files with 6 additions and 2 deletions
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6
doc/ref/api-regex.texi
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@ -57,7 +57,11 @@ locale's encoding, and then passed to the C library's regular expression
routines (@pxref{Regular Expressions,,, libc, The GNU C Library
Reference Manual}). The returned match structures always point to
characters in the strings, not to individual bytes, even in the case of
multi-byte encodings.
multi-byte encodings. This ensures that the match structures are
correct when performing matching with characters that have a multi-byte
representation in the locale encoding. Note, however, that using
characters which cannot be represented in the locale encoding can
lead to surprising results.
@deffn {Scheme Procedure} string-match pattern str [start]
Compile the string @var{pattern} into a regular expression and compare