# add compile error for using @tagName on extern union · gitcafe/zig

[View on GitCafe](https://git.cafe/gitcafe/zig/commit/790aaeacaea88782987c4145bc7ae47a401563f1)

Repository: [gitcafe/zig](https://git.cafe/gitcafe/zig)

Visibility: public

Requested revision: 790aaeacaea88782987c4145bc7ae47a401563f1

Requested commit: 790aaeacaea88782987c4145bc7ae47a401563f1

Commit: 790aaeacaea88782987c4145bc7ae47a401563f1

Tree: 0aad6bf2e1c29b0dab883a2633b4d380f68dfc51

Author: Andrew Kelley

Committer: Andrew Kelley

## Message

```
add compile error for using @tagName on extern union

closes #742

```

## Parents

- [bb80daf509b7afd84fe3076347e69e8f39f586d6](https://git.cafe/gitcafe/zig/commit/bb80daf509b7afd84fe3076347e69e8f39f586d6?format=markdown)

[Source at this commit](https://git.cafe/gitcafe/zig/tree/790aaeacaea88782987c4145bc7ae47a401563f1?format=markdown)