Re: Regtest for issue 5181

[David Kastrup]

Thomas Morley <address@hidden> writes:

> 2017-09-23 9:31 GMT+02:00 David Kastrup <address@hidden>:
>> Thomas Morley <address@hidden> writes:
>>
>>> 2017-09-22 12:22 GMT+02:00 David Kastrup <address@hidden>:
>>>>
>>>> Now things become _really_ embarrassing.  Trying to come up with
>>>> improvements on your regtest convinced me that this kind of
>>>> syntactical feature is not served well by a graphical test featuring
>>>> the typeset results.
>>>>
>>>> So I stole a bunch of code from the display-lily-tests.ly regtest.
>
> Up to now I've only a vage impression what
> 'parse-lily-and-compute-lily-string' and #(read-hash-extend ...) does.
> I'll currently not dive deeper into it until forced. ;)

 -- Scheme Procedure: read-hash-extend chr proc
 -- C Function: scm_read_hash_extend (chr, proc)
     Install the procedure PROC for reading expressions starting with
     the character sequence ‘#’ and CHR.  PROC will be called with two
     arguments: the character CHR and the port to read further data
     from.  The object returned will be the return value of ‘read’.
     Passing ‘#f’ for PROC will remove a previous setting.

Basically what is done with those does a similar job as
scm/parser-ly-from-scheme.scm does for #{ ... #} in Scheme, just for #[
... #].  Also it doesn't bother to cater for closures or sensible
error/expression file locations.

-- 
David Kastrup