zig

test_vector.zig (1491B) - Raw

---

 const std = @import("std");
 const expectEqual = std.testing.expectEqual;
 
 test "Basic vector usage" {
     // Vectors have a compile-time known length and base type.
     const a = @Vector(4, i32){ 1, 2, 3, 4 };
     const b = @Vector(4, i32){ 5, 6, 7, 8 };
 
     // Math operations take place element-wise.
     const c = a + b;
 
     // Individual vector elements can be accessed using array indexing syntax.
     try expectEqual(6, c[0]);
     try expectEqual(8, c[1]);
     try expectEqual(10, c[2]);
     try expectEqual(12, c[3]);
 }
 
 test "Conversion between vectors, arrays, and slices" {
     // Vectors and fixed-length arrays can be automatically assigned back and forth
     const arr1: [4]f32 = [_]f32{ 1.1, 3.2, 4.5, 5.6 };
     const vec: @Vector(4, f32) = arr1;
     const 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].*;
 
     const slice: []const f32 = &arr1;
     var offset: u32 = 1; // var to make it runtime-known
     _ = &offset; // suppress 'var is never mutated' error
     // To extract a comptime-known length from a runtime-known offset,
     // first extract a new slice from the starting offset, then an array of
     // comptime-known length
     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);
 }
 
 // test