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Subject: [boost] [system] virtual ~error_category
From: Peter Dimov (lists_at_[hidden])
Date: 2018-02-12 19:13:23

The virtual destructor of error_category creates problems for
constexpr-ification because it makes the class non-literal.

I can't think of a scenario in which we need the destructor to be virtual.
It's probably virtual for "guideline" reasons - the class has virtual
functions. But does it really need to be? Error categories aren't destroyed
via a pointer to base. They are, in fact, static instances, not destroyed at
all, except on program exit.

Can anyone think of a case in which error_category needs the virtual

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