[isabelle-dev] NEWS: generated code as proper theory export

[Makarius]

On 05.02.19 13:18, Salomon Sickert wrote:
> 
>>
>> It should be easy to make this part of the formal session, with some
>> options [condition = ISABELLE_MLTON].
>>
>> The 'export_code' command will have to emit generated files
>> (Generated_Files.add_files) to make the assembly work in Isabelle/ML.
>>
>> I have already added support for executable exports in
>> Isabelle/c175499a7537 -- a few more such fine-tunings might be required.
> 
> Could someone point me to an example on how to do compilation with either mlton or polyml within a formal session?
> The build scripts in these two entries are copying the style of the CAVA entry at that time and I’m not sure about the current best practices here.

A partial example with generated files is src/Tools/Haskell/Test.thy 
(e.g. in Isabelle/2c3e5e58d93f): the generated Haskell sources are used 
for a test build, but its result is thrown away instead of exporting it.

I have some ideas in the pipeline to make the 'export_files' 
specifications in session ROOT entries more robust (no export by 
default) and more useful (collective export on something like "isabelle 
build -e").


We also need to wait for Florian Haftmann to provide the 
Generated_Files.add_files facility to 'export_code' -- in parallel to 
its existing Export.export. The main difference that this will be an 
update on the theory.


(Note that I am presently busy elsewhere and only sporadically connected.)

	Makarius