External Issue: Feature idea/request: array splices

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21295, "cassella", "Feature idea/request: array splices", "2022-12-26T18:41:59Z"

As a sort of inverse of array slicing,

var C: [1..4] int;
ref A = C[1..2];
ref B = C[3..4];

Would it be possible/feasible/useful to support constructing something like an array slice that instead is "backed by" two or more arrays?

var A: [1..2] int;
var B: [3..4] int;
ref C = splice(A, B);

(Requiring Aand B to have suitable index sets to result in a legal rectangular domain when joined?)

(Inspired by this discourse question on Array Concatenation.)

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