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### 722. Missing [c.math] functions `nanf` and `nanl`

Section: 26.8 [c.math] Status: CD1 Submitter: Daniel Krügler Opened: 2007-08-27 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

In the listing of 26.8 [c.math], table 108: Header `<cmath>` synopsis I miss the following C99 functions (from 7.12.11.2):

>     float nanf(const char *tagp);
>     long double nanl(const char *tagp);

(Note: These functions cannot be overloaded and they are also not listed anywhere else)

Proposed resolution:

In 26.8 [c.math], table 108, section "Functions", add `nanf` and `nanl` just after the existing entry `nan`.