Library updates for C++20/C++2a

Clang Frontend
1

I investigate new features of C++20 and not found implementation of three-way comparsion operator support (spaceship operator, <=>) - header. But my compiller work correctly with myself version of this header.

Can I help community to write cxxlib port of C++20 standard. Or I may be help in other directions of development.

Thanks,
Boris Vinogradov

2

I investigate new features of C++20 and not found implementation of three-way comparsion operator support (spaceship operator, <=>) - header. But my compiller (clang version 7.0.0) work correctly with myself scratch draft version of this header (one compare class and stuff).

Can I help community to write cxxlib port of C++20 standard? Or I may be can I help in other directions of development?

Thanks,
Boris Vinogradov

3

There’s a lot of churn in the draft standard at the moment regarding the spaceship operator.
We’re deliberately waiting until things settle down before implementing.

from just the last WG21 meeting:

  • P1187 A type trait for std::compare_3way()'s type

  • P1191 Adding operator<=> to types that are not currently comparable

  • P1248 Fixing Relations

  • P0891 Let strong_order Truly Be a Customization Point!

  • P1312 Comparison Concepts

  • P1295 Spaceship library update

– Marshall

4

I investigate new features of C++20 and not found implementation of three-way comparsion operator support (spaceship operator, <=>) - header. But my compiller (clang version 7.0.0) work correctly with myself scratch draft version of this header (one compare class and stuff).

Can I help community to write cxxlib port of C++20 standard? Or I may be can I help in other directions of development?

There’s a lot of churn in the draft standard at the moment regarding the spaceship operator.
We’re deliberately waiting until things settle down before implementing.

from just the last WG21 meeting:

  • P1187 A type trait for std::compare_3way()'s type

  • P1191 Adding operator<=> to types that are not currently comparable

  • P1248 Fixing Relations

FWIW: P1248 is about the Relation concept, it doesn’t directly relate to <=>. So there were merely 5 papers proposing <=> changes :wink: