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2248. numeric_limits::is_iec559 misnamed

Section: 17.3.5 [numeric.limits] Status: NAD Submitter: Pete Becker Opened: 2013-03-08 Last modified: 2026-06-09

Priority: 4

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Discussion:

This member should probably be named "is_ieee754". Or at least the standard should explain that IEC-559 no longer exists, and that it's been superseded by IEEE-754.

[2016-06, Oulu]

The ISO version of the standard is ISO/IEC/IEEE 60559:2011, which C11 Annex F refers to as IEC 60559 (although C still refers to it as IEC 559 in the __STDC_IEC_559__ macro).

[Brno 2026-06-09; Status changed: New → NAD.]

It's far too late to rename this, we should encourage P1841 instead.

Proposed resolution: