This is not thread safe, but I think that was already true of Catch.
The construction/destruction of the std::ostringstream is where the
vast majority of time is spent per assertion. A simple test of
100000000 CHECK()s is reduced from around 60s to 7.4s
By using char const * instead of std::string we avoid significant
copying per assertion. In a simple loop with 10000000 CHECKS on
my system, this reduces the run time from 9.8s to 6s.
Unexpected exceptions no longer cause abort and there should be no more
potential for false negatives.
The trade-off now is that exceptions are no longer translated.
- moved as much logic out of the macros as possible
- moved most logic into new ResultBuilder class, which wraps ExpressionResultBuilder (may take it over next), subsumes ResultAction and also takes place of ExpressionDecomposer.
This introduces many SRP violations - but all in the name of minimising macro logic!
