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Showing content from https://cplusplus.github.io/LWG/issue64 below:

Issue 64: Exception handling in basic_istream::operator>>(basic_streambuf*)

This page is a snapshot from the LWG issues list, see the Library Active Issues List for more information and the meaning of TC1 status.

Section: 31.7.5.3.3 [istream.extractors] Status: TC1 Submitter: Matt Austern Opened: 1998-08-11 Last modified: 2017-04-22

Priority: Not Prioritized

View all other issues in [istream.extractors].

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Discussion:

27.6.1.2.3, paragraph 13, is ambiguous. It can be interpreted two different ways, depending on whether the second sentence is read as an elaboration of the first.

Proposed resolution:

Replace [istream::extractors], paragraph 13, which begins "If the function inserts no characters ..." with:

If the function inserts no characters, it calls setstate(failbit), which may throw ios_base::failure (27.4.4.3). If it inserted no characters because it caught an exception thrown while extracting characters from sb and failbit is on in exceptions() (27.4.4.3), then the caught exception is rethrown.

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