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By default, searches in Emacs ignore the case of the text they are searching through; if you specify searching for ‘FOO’, then ‘Foo’ or ‘foo’ is also considered a match. This applies to regular expressions, too; thus, ‘[aB]’ would match ‘a’ or ‘A’ or ‘b’ or ‘B’.
If you do not want this feature, set the variable case-fold-search to
nil. Then all letters must match exactly, including case. This is a
buffer-local variable; altering the variable affects only the current
buffer. (Voir la section Introduction to Buffer-Local Variables.) Alternatively, you may change the
value of default-case-fold-search, which is the default value of
case-fold-search for buffers that do not override it.
Note that the user-level incremental search feature handles case distinctions differently. When given a lower case letter, it looks for a match of either case, but when given an upper case letter, it looks for an upper case letter only. But this has nothing to do with the searching functions used in Lisp code.
This variable determines whether the higher level replacement functions
should preserve case. If the variable is nil, that means to use the
replacement text verbatim. A non-nil value means to convert the case
of the replacement text according to the text being replaced.
This variable is used by passing it as an argument to the function
replace-match. Voir la section Replacing the Text that Matched.
This buffer-local variable determines whether searches should ignore case.
If the variable is nil they do not ignore case; otherwise they do
ignore case.
The value of this variable is the default value for case-fold-search
in buffers that do not override it. This is the same as
(default-value 'case-fold-search).
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Ce document a été généré par Eric Reinbold le 13 Octobre 2007 en utilisant texi2html 1.78.