pointer to array not compatible to a pointer to 'const' array?

Question

In a C module (aka, compilation unit), I want to have some private data, but expose it read-only to the outside world. I achieve that by having a field in a s

Answer 1

It is indeed the same double pointer issue you refer to in the question.

You can convert pointer-to-T to pointer-to-const-T. But const applied to an array qualifies the element type, not the array type (C11 6.7.3.9), so that's not what you're trying to do here. You're not trying to convert pointer-to-array-of-T to pointer-to-const-array-of T, but rather trying to convert to pointer-to-array-of-const-T, and those two types are not compatible in C.