Issue with arrays in codegen when using the NF

[Francesco Casella]

Please check ​https://libraries.openmodelica.org/branches/newInst/Modelica_3.2.2/files/Modelica_3.2.2_Modelica.Blocks.Examples.NoiseExamples.Distributions.err Modelica.Blocks.Examples.NoiseExamples.Distributions. The following error is obtained:

[CodegenCFunctions.tpl:4819:15-4819:15:writable] Error: Template error:
This should have been handled in indexed assign and should not have gotten here.
state[1:2].
[CodegenCFunctions.tpl:4819:15-4819:15:writable] Error: Template error:
This should have been handled in indexed assign and should not have gotten here. 
state[i:i + 1].

Apparently, something's wrong in the NF-generated DAE structure that the back-end does not handle as expected.

[Francesco Casella]

Apparently, the offending code is the statement

  state[i:i+1] := aux;

inside function initialStateWithXorshift64star. The old FE expanded the righ-hand-side to

    state[i:1 + i] := {aux[1], aux[2]};

while the NF keeps the same expression as in the original code.

I'm not sure if the NF or the code generation needs to be updated here.

[Per Östlund]

Fixed in 801639b. Not expanding the rhs seems to work fine, the actual issue was that the assignment wasn't marked as an array assignment.