This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-04-13
809. Deprecation of the register keywordSection: 9.2.2 [dcl.stc] Status: CD2 Submitter: UK Date: 3 March, 2009[Voted into WP at October, 2009 meeting.]
The register keyword serves very little function, offering no more than a hint that a note says is typically ignored. It should be deprecated in this version of the standard, freeing the reserved name up for use in a future standard, much like auto has been re-used this time around for being similarly useless.
Notes from the March, 2009 meeting:
The consensus of the CWG was in favor of deprecating register.
Proposed resolution (September, 2009):
Change 9.2.2 [dcl.stc] paragraph 3 as follows:
A register specifier is a hint to the implementation that the object so declared will be heavily used. [Note: the hint can be ignored and in most implementations it will be ignored if the address of the object is taken. This use is deprecated (see [depr.register]). —end note]
Add a new section following _N3000_.D.4 [depr.string]:
register keyword [depr.register]
The use of the register keyword as a storage-class-specifier is deprecated (see 9.2.2 [dcl.stc]).
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