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Add missing <tuple> include #2407

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vitaut merged 1 commit into from
Jul 1, 2021
Merged

Add missing <tuple> include #2407

vitaut merged 1 commit into from
Jul 1, 2021

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@joemmett
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@joemmett joemmett commented Jul 1, 2021 •
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ranges.h needs std::get overloads from <tuple> but does not directly
include it. This causes compilation failures in MSVC with /permissive-.
On other platforms <tuple> is included as a dependency from other headers
(specifically from <memory>), but there is no such implicit dependency in
MSVC's STL.

Fixes #2401

@joemmett joemmett mentioned this pull request Jul 1, 2021
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@vitaut
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vitaut commented Jul 1, 2021

Thanks for the PR. fmt/ranges.h shouldn't include <tuple> so the correct fix would be to replace using std::get with using namespace std.

@joemmett
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joemmett commented Jul 1, 2021

Would you prefer a using std::get? I see that pattern used already in this file.

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vitaut commented Jul 1, 2021

Would you prefer a using std::get?

If it works then sure.

@joemmett
Fix missing std::get overload in MSVC
11112ee 
This replaces the `std::get` call with an unqualified equivalent to allow
it to be treated as a dependent call.

ranges.h needs std::get overloads from `<tuple>` but does not directly
include it. This causes compilation failures in MSVC with /permissive-.
On other platforms `<tuple>` is included as a dependency from other headers
(specifically from `<memory>`), but there is no such implicit dependency in
MSVC's STL.

Fixes fmtlib#2401
@joemmett joemmett force-pushed the add_tuple_header branch from 174d097 to 11112ee Compare July 1, 2021 17:06
@joemmett
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joemmett commented Jul 1, 2021

Would you prefer a using std::get?

If it works then sure.

It does, but note that these changes to unqualified get calls will allow ADL to potentially find other gets and that might not always be what you want.

@vitaut vitaut merged commit 889bbf2 into fmtlib:master Jul 1, 2021
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vitaut commented Jul 1, 2021

Thank you!

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[MSVC][permissive-] ranges.h(395,41): error C2672: 'get': no matching overloaded function found

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@joemmett @vitaut