118 lines
2.2 KiB
Zig
118 lines
2.2 KiB
Zig
const assert = @import("std").debug.assert;
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const mem = @import("std").mem;
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test "arrays" {
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var array: [5]u32 = undefined;
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var i: u32 = 0;
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while (i < 5) {
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array[i] = i + 1;
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i = array[i];
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}
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i = 0;
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var accumulator = u32(0);
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while (i < 5) {
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accumulator += array[i];
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i += 1;
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}
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assert(accumulator == 15);
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assert(getArrayLen(array) == 5);
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}
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fn getArrayLen(a: []const u32) usize {
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return a.len;
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}
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test "void arrays" {
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var array: [4]void = undefined;
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array[0] = void{};
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array[1] = array[2];
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assert(@sizeOf(@typeOf(array)) == 0);
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assert(array.len == 4);
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}
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test "array literal" {
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const hex_mult = []u16{
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4096,
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256,
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16,
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1,
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};
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assert(hex_mult.len == 4);
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assert(hex_mult[1] == 256);
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}
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test "array dot len const expr" {
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assert(comptime x: {
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break :x some_array.len == 4;
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});
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}
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const ArrayDotLenConstExpr = struct {
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y: [some_array.len]u8,
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};
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const some_array = []u8{
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0,
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1,
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2,
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3,
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};
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test "nested arrays" {
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const array_of_strings = [][]const u8{
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"hello",
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"this",
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"is",
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"my",
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"thing",
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};
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for (array_of_strings) |s, i| {
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if (i == 0) assert(mem.eql(u8, s, "hello"));
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if (i == 1) assert(mem.eql(u8, s, "this"));
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if (i == 2) assert(mem.eql(u8, s, "is"));
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if (i == 3) assert(mem.eql(u8, s, "my"));
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if (i == 4) assert(mem.eql(u8, s, "thing"));
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}
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}
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var s_array: [8]Sub = undefined;
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const Sub = struct {
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b: u8,
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};
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const Str = struct {
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a: []Sub,
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};
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test "set global var array via slice embedded in struct" {
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var s = Str{ .a = s_array[0..] };
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s.a[0].b = 1;
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s.a[1].b = 2;
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s.a[2].b = 3;
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assert(s_array[0].b == 1);
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assert(s_array[1].b == 2);
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assert(s_array[2].b == 3);
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}
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test "array literal with specified size" {
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var array = [2]u8{
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1,
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2,
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};
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assert(array[0] == 1);
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assert(array[1] == 2);
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}
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test "array child property" {
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var x: [5]i32 = undefined;
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assert(@typeOf(x).Child == i32);
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}
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test "array len property" {
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var x: [5]i32 = undefined;
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assert(@typeOf(x).len == 5);
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}
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