I have a function with many structures as inputs and one output. To simplify it let's write it like this:
function sOut = myfun(sOut,sIn1,sIn2)
sOut.a = sIn1.a + sIn2.a;
sOut.b = sIn1.b + sIn2.b;
end
When generating c-code all the inputs are passed by referance, while sIn1 & sIn2 are marked as const and sOut is not const. A problem arises if accidentally somone modifies sIn1.a, for example:
function sOut = myfun(sOut,sIn1,sIn2)
sIn1.a = sIn1.a + 1;
sOut.a = sIn1.a + sIn2.a;
sOut.b = sIn1.b + sIn2.b;
end
In such case in generated code sIn1 is no longer passed as const but as a usual pointer, meaning that sIn1 is modified during call of myfun, although it is not an output!
I expect Matlab Coder at least to make a local copy instead of writing to a variable passed as input only, and really what I want to know is there a way to specifiy that sIn1 & sIn2 are inputs only, generating compilation error or something if they are treated otherwise? Passing the inputs structures by value is not an option.
In reality such accident can happen in a project with many functuions edited by diffrent people, and it is difficult to detect.
