This page is a snapshot from the LWG issues list, see the Library Active Issues List for more information and the meaning of New status.
Section: 16.4.5.3 [reserved.names] Status: New Submitter: Hubert Tong Opened: 2021-05-10 Last modified: 2021-05-20
Priority: 3
View all other issues in [reserved.names].
View all issues with New status.
Discussion:
The C standard has a section called "Future library directions". This is subclause 7.31 in C17, which is the version that the C++ working draft references. C reserves the names described in that subclause for its standard library, allowing C library vendors to introduce some names from future standards as conforming, "orthogonal" extensions. ISO C++ does not appear to reserve these names in a clear way. In particular, 16.4.5.3 [reserved.names] has wording about names and function signatures "from the C standard library declared with external linkage", but C's "Future library directions" describes names that "may be added to the declarations in [some] header[s]".
Extra clarity regarding whether these names are actually intended to be reserved by C++ would be appreciated.[2021-05-20; Reflector poll]
Priority set to 3.
Proposed resolution: