GNU Info
(elisp)Standard Regexps
Standard Regular Expressions Used in Editing
============================================
This section describes some variables that hold regular expressions
used for certain purposes in editing:
- Variable: page-delimiter
This is the regular expression describing line-beginnings that
separate pages. The default value is `"^\014"' (i.e., `"^^L"' or
`"^\C-l"'); this matches a line that starts with a formfeed
character.
The following two regular expressions should _not_ assume the match
always starts at the beginning of a line; they should not use `^' to
anchor the match. Most often, the paragraph commands do check for a
match only at the beginning of a line, which means that `^' would be
superfluous. When there is a nonzero left margin, they accept matches
that start after the left margin. In that case, a `^' would be
incorrect. However, a `^' is harmless in modes where a left margin is
never used.
- Variable: paragraph-separate
This is the regular expression for recognizing the beginning of a
line that separates paragraphs. (If you change this, you may have
to change `paragraph-start' also.) The default value is
`"[ \t\f]*$"', which matches a line that consists entirely of
spaces, tabs, and form feeds (after its left margin).
- Variable: paragraph-start
This is the regular expression for recognizing the beginning of a
line that starts _or_ separates paragraphs. The default value is
`"[ \t\n\f]"', which matches a line starting with a space, tab,
newline, or form feed (after its left margin).
- Variable: sentence-end
This is the regular expression describing the end of a sentence.
(All paragraph boundaries also end sentences, regardless.) The
default value is:
"[.?!][]\"')}]*\\($\\| $\\|\t\\| \\)[ \t\n]*"
This means a period, question mark or exclamation mark, followed
optionally by a closing parenthetical character, followed by tabs,
spaces or new lines.
For a detailed explanation of this regular expression, see Note:
Regexp Example.
automatically generated by info2www version 1.2.2.9