1const std = @import("std");
2const expect = std.testing.expect;
3const builtin = @import("builtin");
4
5const module = @This();
6
7fn Point(comptime T: type) type {
8 return struct {
9 const Self = @This();
10 x: T,
11 y: T,
12
13 fn addOne(self: *Self) void {
14 self.x += 1;
15 self.y += 1;
16 }
17 };
18}
19
20fn add(x: i32, y: i32) i32 {
21 return x + y;
22}
23
24test "this refer to module call private fn" {
25 try expect(module.add(1, 2) == 3);
26}
27
28test "this refer to container" {
29 if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
30
31 var pt: Point(i32) = undefined;
32 pt.x = 12;
33 pt.y = 34;
34 Point(i32).addOne(&pt);
35 try expect(pt.x == 13);
36 try expect(pt.y == 35);
37}
38
39const State = struct {
40 const Self = @This();
41 enter: *const fn (previous: ?Self) void,
42};
43
44fn prev(p: ?State) void {
45 expect(p == null) catch @panic("test failure");
46}
47
48test "this used as optional function parameter" {
49 if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
50 if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
51 if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
52
53 var global: State = undefined;
54 global.enter = prev;
55 global.enter(null);
56}
57
58test "@This() in opaque" {
59 const T = opaque {
60 const Self = @This();
61 };
62 comptime std.debug.assert(T.Self == T);
63}