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2835. LWG 2536 seems to misspecify<tgmath.h>

Section: 17.15[support.c.headers], 99 [depr.ctgmath.syn]Status:C++17Submitter: Thomas KoeppeOpened: 2016-11-29Last modified: 2023-02-07

Priority:0

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Discussion:

The resolution of LWG2536⁽ⁱ⁾ touches on the specification of C headers (of the formfoo.h), but while it fixes the specification ofcomplex.h, it fails to address the specification oftgmath.h.

Just likecomplex.h,tgmath.h isnot defined by C. Rather,ourtgmath.h behaves like<ctgmath>, which is specified in [ctgmath.syn].

Suggested resolution:

Amend [depr.c.headers] p3 as follows:

3. The header<complex.h> behaves as if it simply includes the header<ccomplex>.The header<tgmath.h> behaves as if it simply includes the header<ctgmath>.

4. Every other C header […]

See also LWG2828⁽ⁱ⁾.

[2017-01-27 Telecon]

Priority 0

Proposed resolution:

This wording is relative toN4618.

1. Edit [depr.c.headers] as indicated:

   […]

   -2- The use of any of the C++ headers […] is deprecated.

   -3- The header<complex.h> behaves as if it simply includes the header<ccomplex>.The header<tgmath.h> behaves as if it simply includes the header<ctgmath>.

   -4- Every other C header, […]