How to define operator< on an n-tuple that satisfies a strict weak ordering [duplicate]

strict weak ordering This is a mathematical term to define a relationship between two objects. Its definition is: Two objects x and y are equivalent if both f(x, y) and f(y, x) are false. Note that an object is always (by the irreflexivity invariant) equivalent to itself. In terms of C++ this means if you … Read more

Implementing comparison operators via ‘tuple’ and ‘tie’, a good idea?

This is certainly going to make it easier to write a correct operator than rolling it yourself. I’d say only consider a different approach if profiling shows the comparison operation to be a time-consuming part of your application. Otherwise the ease of maintaining this should outweigh any possible performance concerns.

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