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3128. strstream::rdbuf needs a const_cast

Section: D.15.5.4 [depr.strstream.oper] Status: C++20 Submitter: Tim Song Opened: 2018-06-30 Last modified: 2021-02-25

Priority: 0

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Discussion:

strstream::rdbuf has the same issue with a missing const_cast on &sb.

Somewhat amusingly, istrstream::rdbuf and ostrstream::rdbuf got this right, but each with a different style (see issue 252).

[2018-07-20 Status to Tentatively Ready after five positive votes on the reflector.]

[2018-11, Adopted in San Diego]

Proposed resolution:

This wording is relative to N4750.

1. Change D.15.5.4 [depr.strstream.oper] p1 as indicated:

   strstreambuf* rdbuf() const;
   

   -1- Returns: const_cast<strstreambuf*>(&sb).