+a is an experimental flag that is not supported by the OpenModelica backend

sjoelund.se wrote:

+a is an experimental flag that is not supported by the OpenModelica backend

"Experimental" here apparently means 'supported by the OpenModelica frontend only'. Does it also mean that it will be supported by the backend sometime, and if so, is there any idea when? (I can see the difficulty of how to handle arrays in a symbolic context...).

-- Henk

henk wrote:

sjoelund.se wrote:

+a is an experimental flag that is not supported by the OpenModelica backend

"Experimental" here apparently means 'supported by the OpenModelica frontend only'. Does it also mean that it will be supported by the backend sometime, and if so, is there any idea when?.

Found that problem is linked to: Bug [# 1575] Really bad code generation for parameter arrays set via a function call...

Is work on its solution in sight? If not, is there a 'cleaner' alternative (than indexing multiple calls) to return arrays from external functions?

-- Henk

This work was the start of that, but I believe it is on hold. Instead we are working on a new flattening of Modelica models that will keep as much structure as possible intact.

Anyway, the expansion is only a problem for binding equation. By using real equations, the code is efficient.

model Bad

 constant Integer sz=10;

 function fcall

   input Real r;

   output Real[sz] o = fill(r,sz);

 end fcall;

 parameter Real p = 1.5;

 Real x[sz];

equation

 x = fcall(p);

end Bad;