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### 2668. `path::operator+=` is defined, but not `operator+`

Section: 31.12.6 [fs.class.path] Status: NAD Submitter: Jonathan Wakely Opened: 2014-07-03 Last modified: 2017-03-19

Priority: 3

View all other issues in [fs.class.path].

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Discussion:

This doesn't seem to be in Boost.Filesystem, so maybe it isn't needed, but since `path += path2` works then it seems reasonable to expect `path1 + path2` to work as well.

[04 Jul 2014 Beman Dawes comments:]

> The 12 overloads required by `basic_string operator+` scared me off, and I never came back to the issue.

[22 Nov 2015 Beman supplies proposed resolution wording.]

[Apr 2016 Issue updated to address the C++ Working Paper. Previously addressed File System TS]

[2016-11-12, Issaquah]

Sat PM: JW is no longer convinced that this is a good idea.

Proposed resolution:

NAD, Future.

> It is not necessary to provide every possible string operation for class `path` because it is always possible to convert to a string, perform the operation, and convert back to a path. The most commonly needed string operations are provided for class `path` as a convenience, but every added function comes at the cost of increased interface complexity. In this case, the cost is judged to outweigh the convenience.

> Future changes to the language, such as concepts, and changes to the library, such as `basic_string_view`, may allow reduction of the complexity of the class path interface. The LWG may wish to reconsider this issue at that time.