void make(libtest::vchar_t& arg);
void make(libtest::vchar_t& arg, size_t length);
void append(libtest::vchar_ptr_t& arg, const char*);
void make(libtest::vchar_t& arg);
void make(libtest::vchar_t& arg, size_t length);
void append(libtest::vchar_ptr_t& arg, const char*);