• yawniek (11/11) Mar 30 2018 in how far is it or would the following be possible:
• H. S. Teoh (16/23) Mar 30 2018 [...]
• rikki cattermole (3/20) Mar 30 2018 Still need to, front end is barely alpha.

yawniek <yawniek srtnwz.com> writes:

in how far is it or would the following be possible:

dynamically compile and execute some glue logic that is also 
written in D under linux?

and what happens if that code uses phobos or other dub libs that 
are available in the host binary?

especially the 2nd point is important as i would want to load 
100's of those snippets.

For the context: the idea is to create a streaming-ETL system 
where you can dynamically add/remove rules/modules. it would be 
great if logic could be written directly in D and operate on 
specific (library provided) objects.

"H. S. Teoh" <hsteoh quickfur.ath.cx> writes:

On Fri, Mar 30, 2018 at 02:24:45PM +0000, yawniek via Digitalmars-d-learn wrote:
 in how far is it or would the following be possible:
 
 dynamically compile and execute some glue logic that is also written
 in D under linux?
 
 and what happens if that code uses phobos or other dub libs that are
 available in the host binary?

[...]

I've written a program where user input drives the generation of a code
snippet that then gets passed to an invocation of dmd, compiled, linked
and the loaded as a shared library via dlopen(), et al. It works fairly
well, and dmd generally is fast enough that the pause is not very
noticeable. (This was before dmd-as-a-library was available; I imagine
it would be even faster today now that you don't have to spawn a
separate dmd process.)

The generated snippet does import std.math, and it seems to work fine.
But then the generated snippets tend to be fairly small, and only use a
limited subset of the language, so there may be gotchas that I'm not
aware of.


T

-- 
Don't throw out the baby with the bathwater. Use your hands...

rikki cattermole <rikki cattermole.co.nz> writes:

On 31/03/2018 3:38 AM, H. S. Teoh wrote:
 On Fri, Mar 30, 2018 at 02:24:45PM +0000, yawniek via Digitalmars-d-learn
wrote:
 in how far is it or would the following be possible:

 dynamically compile and execute some glue logic that is also written
 in D under linux?

 and what happens if that code uses phobos or other dub libs that are
 available in the host binary?

 [...]
 
 I've written a program where user input drives the generation of a code
 snippet that then gets passed to an invocation of dmd, compiled, linked
 and the loaded as a shared library via dlopen(), et al. It works fairly
 well, and dmd generally is fast enough that the pause is not very
 noticeable. (This was before dmd-as-a-library was available; I imagine
 it would be even faster today now that you don't have to spawn a
 separate dmd process.)

Still need to, front end is barely alpha.
Can't be reset for example (last I checked, but doubt that has changed).