Re: Recent updates to tree-sitter branch

[Ihor Radchenko]

Yuan Fu <casouri@gmail.com> writes:

>> Will the currently matched node be passed to the function? Or should the
>> function run yet another query to determine the node it was called on?
>
> The matched node is passed to the function.

Thanks for the clarification! I missed this detail in the documentation.

>> OVERRIDE can also be 'prepend or 'append to combine faces from multiple
>> nodes.
>
> You can’t really pretend or append if the only face format we allow is symbol.

Why?
'prepend implies that if there is an existing font-lock-face, the new
face will be prepended to it. Note the 'face text property may contain a
list of faces:

    ‘face’
         The ‘face’ property controls the appearance of the character (*note
         Faces::).  The value of the property can be the following:
    
     ...
             • A list of faces.  Each list element should be either a face
              name or an anonymous face.  This specifies a face which is an
              aggregate of the attributes of each of the listed faces.
              Faces occurring earlier in the list have higher priority.

>> Also, OVERRIDE nil will not apply fontification on the already fontified
>> parts of the region. Note that the parent node might only fontify
>> fraction of the text inside the child node. The parts not yet fontified
>> can make use of OVERRIDE nil.
>
> Ok, I guess it’s good to have options. But I think it is more intuitive and 
> convenient to override by default.

I disagree. The current default in font-lock-keywords is not to
override. If programmatic font-lock behaves differently, it will be
confusing.

-- 
Ihor Radchenko,
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