Re: vim: current best recommended script/function debug method/tool/plugins?

ping wrote:
> On 8/3/2012 11:00 AM, Charles Campbell wrote:
>> ping wrote:
>>> folks:
>>> I'm a newbie to vimL/vim script.
>>> I'm trying to define my own functions and keep getting errors.
>>> Especially I hope there is a way to quickly get the value of my var --
>>> a way better than insert "echo var1|sleep 3" for every var that I want
>>> to inspect.
>>> (I use it a lot, and I need that sleep to make sure I can see the
>>> output from the screen)
>>>
>>> google search mentioned Decho from some thread, but it looks last
>>> update is from 4 years ago. I'd like to hear advice from experts
>>> before diving into it.
>>
>> Try Decho v21m from my website:
>> http://www.drchip.org/astronaut/vim/index.html#DECHO (last update was
>> Apr 18, 2012).
>>
>> Regards,
>> Chip Campbell
>>
> thanks.
> I got it installed, but is still wondering/learning how to use it for
> my script...is there a tutorial for newbie?
>
Have you had a chance to look at the manual for Decho yet? I've now put
an extra section into the help, too.

There are three primary functions:

Dfunc("MyFunctionNameHere(...)") - put at the beginning of function(s)
Dret("MyFunctionNameHere ...") - put just before return points in functions
Decho("...") - put into the body of functions (wherever you feel best)

Here's an example using debugging statements from netrw.vim:
---------
Decho Tab /home/cec/.vim/autoload/netrw.vim
---------
doing autoload/netrw.vim version v144b
netrw#LocalBrowseCheck: isdir</home/cec/.vim/VIMSCRIPT/TST/NETRW/Dir1>=1
LocalBrowseCheck
redir<ls!>:
redir<ls!>: 1 %a "." line 1
redir<ls!>: 3u "~/.vim/AsNeeded/ANtags" line 1
redir<ls!>: 4u a- "Decho Tab" line 0
ft<> b:netrw_curdir< doesn't exist>
dirname</home/cec/.vim/VIMSCRIPT/TST/NETRW/Dir1> line($)=1
s:NetrwBrowse(islocal=1
dirname</home/cec/.vim/VIMSCRIPT/TST/NETRW/Dir1>) liststyle=2 v144b
buf#1<.> win#1 {
|tab#1 win#1
|redir<ls!>: 3
3
4

|redir<ls!>: 1 %a "." line 1
|redir<ls!>: 3u "~/.vim/AsNeeded/ANtags" line 1
|redir<ls!>: 4u a- "Decho Tab" line 0
|s:NetrwBookHistRead() {
||sourcing .netrwbook
||sourcing .netrwhist
||return s:NetrwBookHistRead }
...

Note that s:NetrwBrowse(...) calls s:NetrwBookHistRead(), which then
returns, etc. Consequently, one gets a trace of activity, and function
calls are indented by "|"s as shown courtesty of Dfunc() and Dret().

Many of Decho.vim's commands control where the debugging trace is to
go. By default, Decho opens a window at the bottom of the display.
However, plugins sometimes can't handle extra windows, and so there are
other options:

DechoTabOn -- debugging output will go to a new tab
DechoRemOn -- debugging output will go to a remote gvim
DechoMsgOn -- debugging output will use echomsg
DechoVarOn -- debugging output will go into a variable (by default,
its called g:dechovar)

(there are also ...Off variants: DechoTabOff, DechoRemOff, etc).

Enjoy!
Chip Campbell




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