Replace unweildy COMPILE_ASSERT macro with static_assert #1344
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When this codebase was originally written, there wasn't a built-in
cross-compiler way to add compile-time asserts, so the original
authors did something clever by forcing the compile-time
instantiation of a undefined template class if a precondition was
not met.
However, this produces a wall of insane template errors all wrapped
within macro expansions that is completely unintelligible if you
haven't seen it before.
Since C++11 we have static_assert for the same purpose, and can
produce nice diagnostic strings as an added bonus :)