C++17 creates a practical use of the backward array index operator

Re:C++17 creates a practical use of the backward array index... by jbverschoor on Monday April 03, 2023 @04:22PM (#35430721)

I’ve never seen that before. Luckily

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Re:C++17 creates a practical use of the backward array index... by olliej on Monday April 03, 2023 @04:25PM (#35430752)

He was also a tutor/TA and I think mostly used it to explain how pointers vs. indexing worked. Or possibly to traumatize students :D

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Re:C++17 creates a practical use of the backward array index... by int_19h on Monday April 03, 2023 @07:17PM (#35432724)

It is extremely rare even in ancient C code. The only reason why it exists in C at all is because rewriting a[i] as *(a+i) was inherited by C from B; the latter only has a single machine word type for everything, so there was no way to define it such that a[i] would be legal but i[a] would be illegal in B.

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