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Clarify when it's good to update a tags table and why.

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Richard M. Stallman 2001-07-02 21:24:10 +00:00
parent 4ce5c22387
commit 55d3737db5
1 changed files with 7 additions and 9 deletions
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16
man/maintaining.texi
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@ -376,16 +376,14 @@ its file name and contents. You can specify the language with the
If the tags table data become outdated due to changes in the files
described in the table, the way to update the tags table is the same
way it was made in the first place. But it is not necessary to do
this very often.
If the tags table fails to record a tag, or records it for the wrong
file, then Emacs cannot possibly find its definition. However, if the
way it was made in the first place. If the tags table fails to record
a tag, or records it for the wrong file, then Emacs cannot possibly
find its definition until you update the tags table. However, if the
position recorded in the tags table becomes a little bit wrong (due to
some editing in the file that the tag definition is in), the only
consequence is a slight delay in finding the tag. Even if the stored
position is very wrong, Emacs will still find the tag, but it must
search the entire file for it.
other editing), the only consequence is a slight delay in finding the
tag. Even if the stored position is very far wrong, Emacs will still
find the tag, after searching most of the file for it. Even that
delay is hardly noticeable with today's computers.
So you should update a tags table when you define new tags that you want
to have listed, or when you move tag definitions from one file to another,