test_vector.zig

const std = @import("std");
const expectEqual = std.testing.expectEqual;

test "Basic vector usage" {
    // Vectors have a compil-time known length and base type.
    const a = @Vector(4, i32){ 1, 2, 3, 4 };
    const b = @Vector(4, i32){ 5, 6, 7, 8 };
    const c = a + b;

    try expectEqual(6, c[0]);
    try expectEqual(8, c[1]);
    try expectEqual(10, c[2]);
    try expectEqual(12, c[3]);
}

test "Conversion between vertors, arrays, and slices" {
    var arr1: [4]f32 = [_]f32{ 1.1, 3.2, 4.5, 5.6 };
    var vec: @Vector(4, f32) = arr1;
    var arr2: [4]f32 = vec;
    try expectEqual(arr1, arr2);

    // You can also assign from a slice with comptime-known length to a
    // vector using.
    const vec2: @Vector(2, f32) = arr1[1..3].*;

    var slice: []const f32 = &arr1;
    var offset: u32 = 1;

    const vec3: @Vector(2, f32) = slice[offset..][0..2].*;
    try expectEqual(slice[offset], vec2[0]);
    try expectEqual(slice[offset + 1], vec2[1]);
    try expectEqual(vec2, vec3);
}