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3093. LWG 2294/2192 missed a std::abs overload

Section: 29.7.2 [c.math.abs], 17.2.2 [cstdlib.syn], 31.13.2 [cinttypes.syn] Status: New Submitter: Richard Smith Opened: 2018-03-30 Last modified: 2018-06-19

Priority: 3

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Discussion:

LWG 2192⁽ⁱ⁾ changed the library specification so that you always get all the std::abs overloads for fundamental types if you get any of them.

Except that it missed one: <cinttypes> provides a std::abs (and std::div) overload for intmax_t if it's not long long (since LWG 1449⁽ⁱ⁾). Presumably that one should also follow the <cstdlib>/<cmath> pattern and we should make the complete abs overload set available whenever any of the three headers is included? (And likewise we should make the complete std::div overload set available whenever either <cstdlib> or <cinttypes> is included.)

[2018-06-18 after reflector discussion]

Priority set to 3

Proposed resolution: