[RFC] err |= ios_base::failbit or err = ios_base::failbit?!?

[Martin Sebor]

Nathan Myers wrote:

...
> It probably would be better actually to assign failbit,  rather than
> ORing it in. 

Perhaps. It certainly is what 22.2, p2 says, but it is contrary
to what the individual clauses for num_get and money_get specify.
There is no text specifying what time_get does with the iostate
argument, so it presumably defaults to 22.2, p2, creating an
inconsistency between how the facets report errors to callers.

> We should check that the istream extractor code does
> the Right Thing with error results from facet calls, and does not 
> (e.g.) just pass the basic_ios member directly as the err argument.

You're probably thinking of passing *this as the ios_base asrgument
(there is no conversion from ios_base to iostate).

Martin