Re: Qeustion about Ftreesit_pattern_expand

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

Yuan Fu <casouri@gmail.com> writes:

>> On Jun 24, 2024, at 2:26 PM, Gerd Möllmann <gerd.moellmann@gmail.com> wrote:
>> 
>> Not important, just as context: I wanted to see if igc works with
>> treesit Lisp objects, built with treesitter, and finally even got
>> grammars for C and C++ installed :-/. Font-locking didn't work in my
>> fork (CL packages), which I fixed.
>> 
>> My question:
>> 
>> Function Ftreesit_pattern_expand uses this to print Lisp objects:
>> 
>>  return Fprin1_to_string (pattern, Qnil, Qt);
>> 
>> where prin1 prints readably, and second arg nil means add escapes as
>> needed to that the result can be read back, by function read.
>> 
>> Why is it printing readably with escapes?
>> 
>> I know tree-sitter doesn't understand Lisp escaping because that was my
>> problem with the font-locking. Or, in other words, should the second arg
>> be Qt for don't escape?
>> 
>
> Thanks for checking this Gerd. IIUC, readably is controlled by the
> second argument, so it’s not redundant: if the second arg is Qnil,
> print readably (prin1), if it’s Qt, print without quotes and escapes
> (princ). I guess the function should’ve been called print-to-string to
> avoid confusion.

Erm, there's a misunderstanding it seems. I'm not talking about function
names or anything, I'm basically saying that the function call to
Fprin1_to_string is wrong, and its second argument should be Qt
not Qnil :-)