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eat exceptions thrown by event handlers rather than letting
them propagate out as documented in the specification.

--HG--
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--HG--
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output logging destination (in addition to the std::ostream supported already).

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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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particular, I removed the enumerator over blocks in favor of a simple
get_blocks() function that just returns a std::vector of all the blocks.
I also removed the requires clauses on the block and key accessor functions
and instead made a request for a non-existent key/block result in a non-fatal
exception.  This way users can let the config reader perform a more natural
role in config file validation (by catching this exception and acting accordingly).

--HG--
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--HG--
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I also changed a matrix test case to be more robust.

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--HG--
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that you can get from gcc in certain cases.

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--HG--
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--HG--
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computing a properly weighted Gaussian function.

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optimization of the weights before it finishes.  This ensures that we always
end up with the best weights for the support vectors we obtain after the
conjugate gradient optimization step.

--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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--HG--
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connection object.

--HG--
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--HG--
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--HG--
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--HG--
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zero_border_pixels() functions.  Their contracts said there was no upper limit on the
size of the border that could be assigned/zeroed but the implementations failed to
handle the case where the border was bigger than the image.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403056