Hi David, On 16/11/11 15:07, David Kastrup wrote: > Ian Hulin <[email protected]> writes: > >> Hi David, >> >>> <URL:http://code.google.com/p/lilypond/issues/detail?id=2043> >>> >>> Accompanying patch is relative to staging currently. This should >>> get you going again. I don't particularly like this approach, and >>> it is more complex and error-prone, and likely slower than the >>> original version. But without access to procedure-environments, I >>> see no simpler way out here. >>> >> Thank you very much for getting on to this so quickly. I started >> having a look at the Guile V1.8.7 code to see if we could "borrow" it >> to put in our code base, but it looks like they've done some janitor >> work with the code in addition to changing the name of the underlying >> internal routine from scm-i-eval to eval. >> >> However, it may be work asking if the Guile team would be up to >> supplying an unsupported (from their end) version which we could >> stitch in to our code-base. > > Well, getting a procedure-environment would appear to be incompatible > with optimized compilation of the function containing #{ ... #}. It > would have to be executed in a mostly interpreted environment. But > since #{ ... #} itself calls the lexer and parser, this would be a > non-issue except when the function does extensive loops before executing > a single #{ ... #} statement. > >> Andy and Ludo were quite helpful with providing us with a back-ported >> module-export-all! when ly_make_module was in danger of breaking. >> >> Would it be worth asking on guile-user about a private copy of a >> ported scm_local_eval? > > I think it would likely be incompatible with the compilation model of > Guile V2. scm_local_eval alone does not do the trick: you also need > something to feed it with, namely the result of calling > procedure-environment. I don't think you can get _that_ without having > a whole interpreter built around it. It is not a general Scheme feature > but was specific to Guile, and I doubt it will come back. > Rats. I've just posted the question on guile-user. Oh well, thanks for considering it anyway.
Cheers, Ian _______________________________________________ lilypond-devel mailing list [email protected] https://lists.gnu.org/mailman/listinfo/lilypond-devel
