Record with 0-length array

[c.schulze@…]

model emptyVector4
  record R
    constant Boolean fixedMixingRatio;
    constant Integer nc_propertyCalculation(min=1);
    final constant Integer nc=if fixedMixingRatio then 1 else nc_propertyCalculation;
    constant Real[nc_propertyCalculation] mixingRatio_propertyCalculation;
    constant Real[nc] defaultMixingRatio = if fixedMixingRatio then {1} else mixingRatio_propertyCalculation;
    constant Real xi_default[nc-1] = defaultMixingRatio[1:end-1]/sum(defaultMixingRatio); 
  end R;
  record R2=R(nc_propertyCalculation=1,fixedMixingRatio=false,mixingRatio_propertyCalculation={1});
  R2 r2;
end emptyVector4;

The type of xi_default cannot be determined. Unusable source code is generated. (r15030)

[Martin Sjölund]

No, type of xi_default is determined. It is just that it has zero-dimensions, which requires special care when generating code (the empty array has unknown/uninteresting type).

[Martin Sjölund]

Fixed in r17404

[c.schulze@…]

new seems to work, but i cannot access the variables properly

model emptyVector4

record R

constant Boolean fixedMixingRatio;
constant Integer nc_propertyCalculation(min=1);
final constant Integer nc=if fixedMixingRatio then 1 else nc_propertyCalculation;
constant Real[nc_propertyCalculation] mixingRatio_propertyCalculation;
constant Real[nc] defaultMixingRatio = if fixedMixingRatio then {1} else mixingRatio_propertyCalculation;
constant Real xi_default[nc-1] = defaultMixingRatio[1:end-1]/sum(defaultMixingRatio);

end R;
record R2=R(nc_propertyCalculation=1,fixedMixingRatio=false,mixingRatio_propertyCalculation={1});
R2 r2;

Real x[r2.nc-1]=r2.defaultMixingRatio[1:end-1]/sum(r2.defaultMixingRatio);

end emptyVector4;

[Adrian Pop]

What do you mean you cannot access variables properly?
OpenModelica removes zero size arrays from the DAE and
they do not appear in the .mat file.

[c.schulze@…]

I'm talking about the "Real x[r2.nc-1]=r2.defaultMixingRatio[1:end-1]/sum(r2.defaultMixingRatio);" line.

The x vector in global scope should be a Real[0], but the model cannot be translated. In this case the vector could be removed completely, but it should translate.