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2649. [filesys.ts] [PDTS] path and directory_entry move ctors should not be noexcept

Section: 8.4.1 [filesys.ts::path.construct], 12 [filesys.ts::class.directory_entry] Status: TS Submitter: Stephan T. Lavavej Opened: 2014-02-03 Last modified: 2017-07-30

Priority: Not Prioritized

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Discussion:

Addresses: filesys.ts

path's move ctor is marked noexcept, but it contains a basic_string. Similarly, directory_entry's move ctor is marked noexcept, but it contains a path. This is affected by LWG 2319 "basic_string's move constructor should not be noexcept".

[Beman Dawes 2014-02-27]

Issues 2637(i), 2638(i), 2641(i), and 2649(i) are concerned with signatures which should or should not be noexcept. I will provide unified proposed wording for these issues, possibly in a separate paper.

[21 May 2014 Beman Dawes provides wording. See 2319(i) for rationale. ]

[19 Jun 2014 LWG revises P/R to stay consistent with LWG issues.]

Proposed resolution:

Change 8 Class path [class.path]: 
path() noexcept;
Change 8.4.1 path constructors [path.construct]: 
path() noexcept;
Change 12 Class directory_entry [class.directory_entry]: 
directory_entry() noexcept = default;