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In Javascript, I just need to append a i to the regexp to make it case-insensitive. In .NET, I use a RegexOptions.IgnoreCase.
I know about case-fold-search. What I want is to specify that behavior in the regex itself, as specified in an elisp program. Possible?
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To disable case-sensitive matching for regexp , use the 'ignorecase' option.
By default, the comparison of an input string with any literal characters in a regular expression pattern is case-sensitive, white space in a regular expression pattern is interpreted as literal white-space characters, and capturing groups in a regular expression are named implicitly as well as explicitly.
Regular Expression Search In GNU Emacs, you can search for the next match for a regexp either incrementally or not. Incremental search for a regexp is done by typing C-M-s ( isearch-forward-regexp ).
As someone said earlier, the way to control this is to bind case-fold-search. There is no way to specify the regex's case-sensitivity (or lack thereof) in the regex itself.
As it happens, regexp matching is already case-insensitive by default.
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