[TxMt] User defined symbols and folding

[Allan Odgaard]

On 6 Jan 2008, at 13:06, Carsten Hoever wrote:

> I am using comments like
>
> %  
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> ======================================================================
> % Doing something...
> %  
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> = 
> ======================================================================
>
> [...]
> to structure the code inside my MATLAB files. For easier navigation  
> I would like to use these comments as folding markers and symbols  
> (for the "Go to symbol" command). I know that I have to play around  
> with the language grammar to do so, but alas my more than limited  
> knowledge of regular expressions has prevented me from succeeding.  
> Maybe one of the language grammar/regex experts here has a quick tip  
> for me?

It is not entirely trivial. For the symbol pop-up you need the grammar  
to identify the lines, you can either do the simple pattern that just  
matched: ‘^% ([A-Z]\w+.*)$’ -- i.e. all commented lines that start  
with an uppercase letter, and then scope the text so that it can be  
selected by the symbol pop-up preference -- another approach is using  
begin/end rules to only match lines surrounded by: ‘% =+’.

As for foldings, this is likely not possible because of the current  
rule about clearly defined start and end markers and only allowing  
matches to look at one line.