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doc: STYLE commentary on nothrow v. noexcept.

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Jason Volk 2018-04-04 12:02:11 -07:00
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doc/STYLE.md
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@ -383,3 +383,14 @@ to break the loop, and then false is returned from until() as well.
Overloads of `for_each()` may be encountered accepting closures that return
`void` and others that return `bool`. The `bool` overloads use the
*until protocol* as that matches the same logic in a `for(; bool;)` loop.
#### nothrow is not noexcept
Often a function is overloaded with an std::nothrow_t argument or our
util::nothrow overload template. This means the function **will not throw
a specific exception expected from the overload alternative** (or set of
exceptions, etc). Any exception may still come out of that nothrow overload;
technically including the specific exception if it came from somewhere else!
When no exceptions whatsoever are expected, the `noexcept` keyword is used.