Function init_string 

pub unsafe extern "C" fn init_string(
    context: *mut c_context,
    value: *mut value,
    str_: *const c_char,
) -> err

@brief Set a string @ingroup value_create @param[out] context Optional, stores error information @param[out] value Nix value to modify @param[in] str the string, copied @return error code, NIX_OK on success.