1const std = @import(
 2    "std",
 3);
 4const Allocator = std.mem.Allocator;
 5const ArrayList = std.ArrayList;
 6
 7const HeaderWeight = enum { H1, H2, H3, H4, H5, H6 };
 8
 9const MdText = ArrayList(u8);
10
11const MdNode = union(enum) {
12    Header: struct {
13        text: MdText,
14        weight: HeaderValue,
15    },
16};
17
18export fn entry() void {
19    const a = MdNode.Header{
20        .text = MdText.init(std.testing.allocator),
21        .weight = HeaderWeight.H1,
22    };
23    _ = a;
24}
25
26// error
27//
28// :14:17: error: use of undeclared identifier 'HeaderValue'