[saagarjha]

Nope, it's undefined:

> Accessing an object by means of any other lvalue expression (other than unsigned char) is undefined behavior

https://wiki.sei.cmu.edu/confluence/display/c/EXP39-C.+Do+no...

[ithkuil]

I don't understand your comment. The link you pasted explicitly mentions the union example as a "compliant solution".

That said, memcpy and a compiler that understand the memcpy intrinsic is probably safer; that said I have a vague memory of hitting an embedded compiler where memcpy wasn't an intrinsic