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Nana provides improved support for assertion checking and logging in C, C++ 
using GDB. In particular it provides:

    o Operations can be implemented directly in C or by generating 
      debugger commands which do the checking and logging only if the 
      application is run under the debugger. The debugger based calls
      require are very space efficient (0 or 1 bytes per call). 
    o Support for checking real time constraints.
    o Support for assertion (invariant checking) including:
        + Space and time efficient (at least versus <assert.h>)
          For example: assert(i>=0) uses 53 bytes on a i386 vs 
          an optimised nana call which uses 10 bytes per call.
        + Checking can be turned on or off at compile or run time.
        + The action taken when an error is detected can be modified 
          on a global and per/call basis.
    o Support for logging (printf style debugging) including:
        + Logging can be turned on and off at compile or run time.
        + Logging to files, processes or circular buffers in memory
          with optional time stamping.
    o Support for the quantifiers of predicate calculus (forall, exists).
    o Support for before and after state saving and checking (x, x').

Phil Maker <pjm@gnu.org>