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### 2888. Variables of library tag types need to be inline variables

Section: 20 [utilities], 32 [thread] Status: Resolved Submitter: Finland Opened: 2017-02-03 Last modified: 2017-03-20

Priority: Not Prioritized

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Discussion:

Addresses FI 9

The variables of library tag types need to be inline variables. Otherwise, using them in inline functions in multiple translation units is an ODR violation.

Proposed change: Make `piecewise_construct`, `allocator_arg`, `nullopt`, (the `in_place_tags` after they are made regular tags), `defer_lock`, `try_to_lock` and `adopt_lock` inline.

[2017-02-03, Marshall notes]

See also GB 28 (LWG 2889)

[2017-02-25, Daniel comments]

There will be the paper p0607r0 provided for the Kona meeting that solves this issue.

[2017-03-12, post-Kona]

Resolved by p0607r0.

Proposed resolution: