1const b = @cDefine("foo", "1");
 2const c = @cImport({
 3    _ = @TypeOf(@cDefine("foo", "1"));
 4});
 5const d = @cImport({
 6    _ = @cImport(@cDefine("foo", "1"));
 7});
 8
 9// error
10//
11// :1:11: error: C define valid only inside C import block
12// :3:17: error: C define valid only inside C import block
13// :6:9: error: cannot nest @cImport