This page is a snapshot from the LWG issues list, see the Library Active Issues List for more information and the meaning of NAD status.
73.is_open should be const
Section: 31.10 [file.streams] Status: NAD Submitter: Matt Austern Opened: 1998-08-27 Last modified: 2017-06-15
Priority: Not Prioritized
View all other issues in [file.streams].
View all issues with NAD status.
Discussion:
Classes basic_ifstream, basic_ofstream, and basic_fstream all have a member function is_open. It should be a const member function, since it does nothing but call one of basic_filebuf's const member functions.
Rationale:
Not a defect. This is a deliberate feature; const streams would be meaningless.
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