This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-08-11
37. When is uncaught_exception() true?Section: _N5001_.14.6.3 [except.uncaught] Status: NAD Submitter: Daveed Vandevoorde Date: 10 Aug 1998The term "throw exception" seems to sometimes refer to an expression of the form "throw expr" and sometimes just to the "expr" portion thereof.
As a result it is not quite clear to me whether when "uncaught_exception()" becomes true: before or after the temporary copy of the value of "expr".
Is there a definite consensus about that?
Rationale: The standard is sufficiently clear; the phrase "to be thrown" indicates that the throw itself (which includes the copy to the temporary object) has not yet begun. The footnote in 14.6.2 [except.terminate] paragraph 1 reinforces this ordering.
See also issue 475.
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