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Clarify that match data is unpredictable after failing searches.

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This commit is contained in:
Richard M. Stallman 2003-02-15 19:27:40 +00:00
parent 95a85681fb
commit 87bf725ea9
1 changed files with 3 additions and 2 deletions
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5
lispref/searching.texi
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@ -1255,7 +1255,7 @@ just the text that matched @samp{\(ba*r\)}.
@subsection Simple Match Data Access
This section explains how to use the match data to find out what was
matched by the last search or match operation.
matched by the last search or match operation, if it succeeded.
You can ask about the entire matching text, or about a particular
parenthetical subexpression of a regular expression. The @var{count}
@ -1273,7 +1273,8 @@ only information available is about the entire match.
A search which fails may or may not alter the match data. In the
past, a failing search did not do this, but we may change it in the
future.
future. So don't try to rely on the value of the match data after
a failing search.
@defun match-string count &optional in-string
This function returns, as a string, the text matched in the last search