zig/test/cases/const_slice_child.zig

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const assert = @import("std").debug.assert;
var argv: &&const u8 = undefined;
fn constSliceChild() {
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@setFnTest(this);
const strs = ([]&const u8) {
c"one",
c"two",
c"three",
};
argv = &strs[0];
bar(strs.len);
}
fn foo(args: [][]const u8) {
assert(args.len == 3);
assert(streql(args[0], "one"));
assert(streql(args[1], "two"));
assert(streql(args[2], "three"));
}
fn bar(argc: usize) {
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const args = @alloca([]u8, argc);
for (args) |_, i| {
const ptr = argv[i];
args[i] = ptr[0...strlen(ptr)];
}
foo(args);
}
fn strlen(ptr: &const u8) -> usize {
var count: usize = 0;
while (ptr[count] != 0; count += 1) {}
return count;
}
fn streql(a: []const u8, b: []const u8) -> bool {
if (a.len != b.len) return false;
for (a) |item, index| {
if (b[index] != item) return false;
}
return true;
}