Nested structs as function parameters are not supported

[IDKWNTCMF]

Description
In C we can use nested structs as function parameters without parent struct typename. But wrappers for such functions cannot be compiled with C++ compilers

Example

struct MainStruct {
    struct InnerStruct {
        int fld;
    } str;
};

int get_fld(struct InnerStruct *str) {
    return str->fld;
}

To Reproduce
Steps to reproduce the behavior:

1. Copy the example above to your project
2. Generate tests for function get_fld
3. Try to run generated tests

Expected behavior
Tests are supposed to be executed successfully.

Actual behavior
Compilation error.

Visual proofs (screenshots, logs)

error: variable has incomplete type 'struct InnerStruct'
    struct InnerStruct expected_str = {