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Consistent Comparison in C++20

Comparison is a ubiquitous operation that we perform when writing code but not everything can be taken for granted. Equality and ordering can sometimes be tricky and there hasn’t been a unified approach to handling them. This changed in C++20 with the adoption of the three-way comparison operator (<=>), also known as the spaceship operator.

This talk will teach you the new consistent ways of writing comparisons.

In this talk you will learn:

  • theoretical aspects of equivalence, equality, and ordering relationships
  • guidelines for implementing comparison
  • what is the new three-way comparison operator in C++20
  • what are the newly introduced comparison categories and how they relate
  • how to write the three-way comparison operator for your types
February 26 @ 11:45
11:45 — 12:30 (45′)


Marius Bancila

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