3 ms·

I thought that type punning via union is against the standard. I personally do not think it should be ... It's a very handy tool.

• electroly 4y ago
  I think it may be a GNU extension to explicitly allow it, but I'm no language lawyer. This header is from glibc; it may explain why it's not available on some platforms.
  • saagarjha 4y ago
    It’s legal in C.
    • asveikau 4y ago
      I think you're right. Most of the top google results seem to be from people who can't mentally separate c and c++. So when i tried to look it up around the time of the comment, i didn't get clear answers.