From: Peter Stephenson <pws@csr.com>
To: zsh-workers@sunsite.dk
Subject: Re: Clarify zshaddhistory doc?
Date: Wed, 18 Feb 2009 17:09:13 +0000 [thread overview]
Message-ID: <200902181709.n1IH9DsQ019474@news01.csr.com> (raw)
In-Reply-To: <090218085720.ZM17261@torch.brasslantern.com>
Bart Schaefer wrote:
> Under the entry for zshaddhistory:
>
> If any of the hook functions return a non-zero value the history
> line will not be saved, although it lingers in the history until
> the next line is executed allow you to reuse or edit it
> immediately.
>
> What exactly does this mean? There's no $zshaddhistory_functions array
> so "any of the hook functions" is either a typo, or must refer to the
> $preexec_functions hooks, which ought to be clearer.
There isn't a zshaddhistory_functions array until you add one, then
there is.
Index: Doc/Zsh/func.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/func.yo,v
retrieving revision 1.23
diff -u -r1.23 func.yo
--- Doc/Zsh/func.yo 5 Sep 2008 09:05:23 -0000 1.23
+++ Doc/Zsh/func.yo 18 Feb 2009 17:07:35 -0000
@@ -189,19 +189,23 @@
sect(Special Functions)
Certain functions, if defined, have special meaning to the shell.
-In the case of tt(chpwd), tt(periodic), tt(precmd) and tt(preexec) it is
-possible to define an array that has the same name with `tt(_functions)'
-appended. Any element in such an array is taken as the name of a function
-to execute; it is executed in the same context and with the same arguments
-as the basic function. For example, if tt($chpwd_functions) is an array
-containing the values `tt(mychpwd)', `tt(chpwd_save_dirstack)', then the
-shell attempts to execute the functions `tt(chpwd)', `tt(mychpwd)' and
+subsect(Hook Functions)
+findex(functions, hook)
+findex(hook functions)
+
+For the functions below, it is possible to define an array that has the
+same name as the function with `tt(_functions)' appended. Any element in
+such an array is taken as the name of a function to execute; it is executed
+in the same context and with the same arguments as the basic function. For
+example, if tt($chpwd_functions) is an array containing the values
+`tt(mychpwd)', `tt(chpwd_save_dirstack)', then the shell attempts to
+execute the functions `tt(chpwd)', `tt(mychpwd)' and
`tt(chpwd_save_dirstack)', in that order. Any function that does not exist
is silently ignored. A function found by this mechanism is referred to
-elsewhere as a `hook function'. An error in any function causes
-subsequent functions not to be run. Note further that an error
-in a tt(precmd) hook causes an immediately following tt(periodic)
-function not to run (thought it may run at the next opportunity).
+elsewhere as a `hook function'. An error in any function causes subsequent
+functions not to be run. Note further that an error in a tt(precmd) hook
+causes an immediately following tt(periodic) function not to run (thought
+it may run at the next opportunity).
startitem()
findex(chpwd)
@@ -277,6 +281,14 @@
precommand modifier is used before an external command. Also, unlike
tt(TRAPEXIT), it is not called when functions exit.
)
+enditem()
+
+subsect(Trap Functions)
+
+The functions below are treated specially but do not have corresponding
+hook arrays.
+
+startitem()
item(tt(TRAP)var(NAL))(
cindex(signals, trapping)
cindex(trapping signals)
--
Peter Stephenson <pws@csr.com> Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK Tel: +44 (0)1223 692070
next prev parent reply other threads:[~2009-02-18 17:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-18 16:57 Bart Schaefer
2009-02-18 17:09 ` Peter Stephenson [this message]
2009-02-18 17:15 ` Mikael Magnusson
2009-02-18 18:39 ` Bart Schaefer
2009-02-19 10:02 ` Peter Stephenson
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