In C++, you cannot constrain pointer arguments of functions using this interface. See Constraint Specification Limitations. The message about DRS in the results is applicable to C code only.
To work around this limitation, you can write manual main()-s of the kind documented here. But depending on the kind of constraint you want to specify, it might be difficult to write an appropriate main(). If you contact MathWorks Technical Support and tell them what kind of constraint you want to specify, they might be able to help you setup this main() .
