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This section describes
how Epsilon can help you access compiler help files and similar
external documentation. See Getting Help for directions on
obtaining help on Epsilon itself.
To get help on the word at point, press Shift-F1
to run the context-help command. It provides help on the
keyword at point, selecting the appropriate type of help based on the
current mode. See Context-Sensitive Help for details. In some modes,
it uses commands explained in this section.
Epsilon for Unix provides a man
command for reading man pages. At its prompt, type anything you would
normally type to the man command, such as
-k open to get a list of
man pages related to the keyword "open". If you don't use any flags
or section names, Epsilon will provide completion on available topics.
For example, type "?" to see all man page topics available. Within
man page output, you can double-click on a reference to another man
page, such as
echo(1), or press <Enter> to follow it, or press
m to be prompted for another man page topic. The man command
also works with the Cygwin environment under Windows, if its
man program is installed.
The search-man-pages command generates a list of man pages that
contain some specified text, putting its results in the grep buffer.
(See Searching Multiple Files.) It first prompts for the search
string. You can use Ctrl-T, Ctrl-C, or Ctrl-W to toggle regular
expression, case folding, or word searching behavior, as with
grep and other searching commands.
Then it asks if you want to restrict searching to particular man page
sections, such as 1 for commands or 3 for subroutines. Use
search all sections. Finally, it asks if you want to restrict the
search to man page entries matching a certain file pattern, such as
*file* to search only pages whose names contain "file".
For speed reasons, it searches each man page without processing it
man command, searching the man page in source format.
By default, it shows only the first match in each page; set the
search-man-pages-shows-all variable to see all matches. The
result appears in the
grep buffer; when you view a match from
there, Epsilon will then use the
man command to display its
Epsilon also includes a perldoc command for reading Perl
documentation. Just like man, it works by running an external
program, in this case the
perldoc program that comes with Perl.
Run perldoc on the topic
perldoc to see the flags you can
use with it, such as
-f to locate the documentation for a
specific Perl function.
You can set up Epsilon for Windows to search for help
on a programming language construct (like an API function or a C++
keyword) in a series of .hlp and .chm (HtmlHelp) files, two older help
file formats. Run the Select Help Files... command on the help menu to
select the help files you want to use. This command adds help files to
the Help menu, to the context menu that the secondary mouse button
displays, and to the list of files searched by the Search All Help
Files... command on the help menu. The last command is only available
under Windows. Edit the file gui.mnu to further
modify the contents of Epsilon's menus. Edit the file
epswhlp.cnt to modify the list of files
searched by Search All Help Files.
If you highlight a word in the buffer before running a help command,
Epsilon will search for help on that keyword. Otherwise Epsilon will
display either a list of available keywords or the table of contents
for the help file you selected.
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