Thanks Gary, this really helps me a lot :)
On Sat, Jul 3, 2010 at 1:23 AM, Gary Johnson <garyj...@spocom.com> wrote:
> On 2010-07-03, X Heruacles wrote:
>
> > On Thu, Jul 1, 2010 at 4:42 AM, Gary Johnson <garyj...@spocom.com>
> wrote:
> >
> > On 2010-06-30, X Heruacles wrote:
> >
> > > On Wed, Jun 30, 2010 at 3:42 PM, Gary Johnson <garyj...@spocom.com
> >
> > wrote:
> > >
> > > On 2010-06-30, X Heruacles wrote:
> > > > I'm just learning lua and I use vim to navigate some lua
> projects.
> > > > I use ctags to generate tags using a map:
> > > >
> > > > map <F12> <Esc>:!ctags -R .<CR>
> > > >
> > > > but it rarely helps. When I want to jump to some
> > > > function definition, it always errs. Then I checked
> > > > the generated tag and it seems fine. So my question is
> > > > just is there a better way to navigate lua
> > > > project?(esp. jumping to function definition?)
> > >
> > > I don't know what else might be available for navigating Lua,
> but
> > > the ctags web page at SourceForge says that it understands Lua,
> and
> > > you write that the tags appear fine, so I would suggest that
> you
> > > find out why your Lua tags aren't working as you expect and fix
> that
> > > problem. If you post a short file containing Lua code and
> explain
> > > what you do and what happens when you try to jump to a tag in
> that
> > > code, we might be able to spot the problem and give you a
> solution.
> > >
> > > Regards,
> > > Gary
> >
> > > thanks Gary. Then I show the code here:
> > > the generated tag has a line looks like this:
> > >
> > > TaskHandler.prizeTask .\init\taskHandler.lua /^function
> > > TaskHandler.prizeTask(plr, task)$/;" f
> > >
> > > and I have a function:
> > >
> > > function Task:succeed()
> > >
> > > debug_log("Task:succeed")
> > >
> > > self.isSucceed = true
> > >
> > > TaskHandler.prizeTask(self.owner, self)
> > >
> > > self:eventOnSuccess()
> > >
> > > if self.spanTimerId > 0 then self:clearSpanTimer() end
> > >
> > > self.owner:addFinishedTask(self)
> > >
> > > if self.entry.type == taskType.TASK_TYPE_MAIN then
> > >
> > > self.owner:setSaveRecord("MainTask", self:getId(), 0)
> > >
> > > else
> > >
> > > end
> > >
> > > if self.entry.nexttask ~= nil and self.entry.nexttask ~= 0 then
> > >
> > > debug_log("self.owner:addTask")
> > >
> > > self.owner:addTask(self.entry.nexttask)
> > >
> > > end
> > >
> > > end
> > >
> > >
> > >
> > > in the file task.lua in the subdirectory of where the tags file
> lies.
> > > While my cursor on "prizeTask", I press Ctrl-], only to find
> > > it shows me an error that can't find the tag: prizeTask. So
> > > it is.
>
> [...]
>
> > So I think that's the problem: you need to have . in your
> > 'iskeyword' option for Lua files.
>
> > Sorry for the late reply Gary and thank you very much that it works!!!
> > But there are others that can't work, so I want to know why this helps. I
> tried
> > to read some help file about iskeyword and isfname, but it hardly did
> help. So
> > I ask you do me a favor to describe the keyword and how it works?(maybe
> this
> > won't waste too much of your time)
> > Thank you again:)
>
> I'll try. Bear in mind that I don't know anything about Lua.
>
> Ctags knows Lua syntax, so it recognizes "TaskHandler.prizeTask" as
> a single entity for which it should create a tag. It creates a tag
> for "TaskHandler.prizeTask" and writes it to the tags file.
>
> When you type ^], Vim looks at the character under the cursor and
> the characters next to it and tries to identify a sequence of
> characters including the one under the cursor that form a keyword,
> by Vim's definition of a keyword. Vim then tries to find that
> keyword in its list of tags.
>
> Vim's definition of a keyword is a sequence of characters from the
> set in the 'iskeyword' option. Vim uses this definition for a lot
> of its commands, not just those related to tags. For example, it
> uses that definition to recognize words when executing w to move to
> the next word or diw to delete the word the cursor is on.
> Consequently, Vim's default definition of 'iskeyword' is set to
> correspond to a word as commonly used in text or a keyword as used
> in most programming languages: a sequence of characters from the
> set of alphanumeric characters and underscore.
>
> When you move Vim's cursor to the start of the Lua identifier
> TaskHandler.prizeTask and type ^], Vim will try to find the keyword
> under the cursor, which by its normal definition is "TaskHandler".
> "TaskHandler" is not a tag, though, so the command fails.
> Similarly, Vim recognizes "prizeTask" as a keyword but it is not a
> tag, either. You can make this work by adding . to the set of
> characters that Vim recognizes as part of a keyword, that is, by
> adding . to 'iskeyword':
>
> :set iskeyword+=.
>
> Now Vim will recognize "TaskHandler.prizeTask" as a single keyword
> and will successfully find it in its list of tags.
>
> The problem with this solution is that Vim will now include . as
> part of a word any time it does something with a word. For example,
> if you moved the cursor to the word "tags" at the end of the
> preceding paragraph and typed '*', Vim would search for the next
> occurrence of "tags.", including the period, not just "tags".
>
> I hope that was clear and not too much.
>
> Regards,
> Gary
>
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