Understanding the Challenges of Using Disjoint Integer Intervals as Keys in C++ Maps
By
signa11
An everything bagel for the brain. Substantive, layered, well-seasoned.
Summary
The article discusses the challenges of using C++ maps with keys as disjoint integer intervals and the implications of inserting non-disjoint intervals. It explains the undefined behavior that occurs in such cases due to the necessity of a strict weak ordering in C++ associative containers.
Key quotes
· 2 pulledThis is undefined behavior, but let's try to understand why.
C++ associative containers depend on the comparison function inducing a strict weak ordering on elements of Key.
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