v/vlib/compiler/tests/pointers_test.v

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fn test_pointer_arithmetic() {
arr := [1,2,3,4]
unsafe {
mut parr := *int(arr.data)
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parr++
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assert 2 == *parr
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parr++
assert 3 == *parr
assert *(parr + 1) == 4
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}
}
fn test_multi_level_pointer_dereferencing() {
n := 100
pn := &n
ppn := &pn
unsafe {
mut pppn := &ppn
***pppn = 300
pppa := ***int(pppn)
assert 300 == ***pppa
}
assert n == 300 // updated by the unsafe pointer manipulation
}