[Rock-dev] API change in iodrivers_base

[Sylvain Joyeux]

1. iodrivers_base changed quite a bit lately. Until now, I tried to
    keep these changes backward compatible (you just get a lot of
    warnings). I just pushed backward-incompatible changes:

       the open* methods now return void and throw on error

    The reason for that is that most people that started to write
    drivers did not actually *check* for the return value. Since
    throwing is anyway the general guideline, I changed it to throw.

2. Additionally, the iodrivers_base::Driver class now supports serial,
    UDP and TCP connections. The openURI method gives a uniform access
    to that (see doxygen documentation for more info)

-- 
Sylvain Joyeux (Dr.Ing.)
Space & Security Robotics

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