zig/doc/langref/test_reduce_builtin.zig

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const std = @import("std");
const expect = std.testing.expect;
test "vector @reduce" {
const V = @Vector(4, i32);
const value = V{ 1, -1, 1, -1 };
const result = value > @as(V, @splat(0));
// result is { true, false, true, false };
try comptime expect(@TypeOf(result) == @Vector(4, bool));
const is_all_true = @reduce(.And, result);
try comptime expect(@TypeOf(is_all_true) == bool);
try expect(is_all_true == false);
}
// test