For the past few months, Aryeh has been doing a heroic work on making
nsresult a strongly typed enum (aka, enum class). Strongly typed enums
are a new feature in C++11 which enable declaring enums which are
treated as real types by the compiler and go through similar type
checking as other types. This morning I landed the final patches to bug
779473 on inbound and they seem to have stuck.
This will not affect you unless you write buggy code, with mistakes such as:
bool foo() {
// ...
if (somethingBadHappened)
return NS_ERROR_FAILURE;
}
And the way it affects you is that the compiler will throw an error
message for the invalid conversion. So, the compiler does more to
detect bugs in the code, which is good!
This is currently enabled on all compilers which support strongly typed
enums (recent clang, gcc >= 4.4, and Visual C++ 2012).
Cheers,
Ehsan
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