P2388 Abort-only contract support

[wg21bot]

P2388R0 Abort-only contract support (Andrzej Krzemieński, Gašper Ažman)

[wg21bot]

P2388R1 Minimum Contract Support: either Ignore or Check_and_abort (Andrzej Krzemieński, Gašper Ažman)

[wg21bot]

P2388R2 Minimum Contract Support: either Ignore or Check_and_abort (Andrzej Krzemieński, Gašper Ažman)

[AaronBallman]

Adding the SG22 label because of design space overlap with C.

[wg21bot]

P2388R3 Minimum Contract Support: either No_eval or Eval_and_abort (Andrzej Krzemieński, Gašper Ažman)

[wg21bot]

P2388R4 Minimum Contract Support: either No_eval or Eval_and_abort (Andrzej Krzemieński, Gašper Ažman)

[ThePhD]

Per communication with the authors, this paper has been superceded by other SG21 work. SG22 does not need to see this.