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[CPP29 REORG] Dissolve [except] #7320

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[CPP29 REORG] Dissolve [except] #7320

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Commits on Oct 18, 2024

  1. [except.uncaught] Tidy the specification for uncaught exceptions 

    Several concurrent fixes.  First include the normative wording
that 'uncaught_exceptions' returns the number of uncaught
exceptions *on the current thread*.  This wording is present
in the core language.

Then move the core wording for when an exception is uncaught
directly into the text that talks about caught and uncaught
exceptions.  In the process, turn the reference to
 into a note, so that there is only
one normative specification.

Finally, remove [except.uncaught] as it is now empty, and add
the missing descriptive sentence to the intro paragraph of
[except.special.general].  This happens to produce quite a
pleasing page-break, but that is just luck, not design.
    @AlisdairM
    AlisdairM committed Oct 18, 2024
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  2. [except.terminate] Better describe the function 

    While 'std:terminate' was originally conceived as the way to
report failures in the exception handling machinery, it has
evolved to become a more general tool for reporting unrecoverable
failures in the C++ runtime.  This rewording attempts to address
that evolving design, and in doing so addresses the outstanding
%FIXME% that the current text is not adequately descriptive in
the first place.
    @AlisdairM
    AlisdairM committed Oct 18, 2024
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  3. [except.spec] Exception specifications are function declarators

    @AlisdairM
    AlisdairM committed Oct 18, 2024
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  4. [except.terminate] Move the 'terminate' function to [basic.start] 

    Now that the terminate function is more general than
just failures of the exception machinery, it belongs
with Start and termination.
    @AlisdairM
    AlisdairM committed Oct 18, 2024
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  5. [except.throw][except.ctor] Move to [basic.exec]

    @AlisdairM
    AlisdairM committed Oct 18, 2024
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  6. [except] Complete dissolving this clause into the rest of the standard

    @AlisdairM
    AlisdairM committed Oct 18, 2024
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  7. [except.pre] Clean-up pass to ensure consistency

    @AlisdairM
    AlisdairM committed Oct 18, 2024
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