Toot

Written by Urix Turing on 2024-09-19 at 14:40

The answer is:

• C++: an infinite loop with no side effects is undefined behavior (an infinite loop with side effects is valid). The practical effect depends on the compiler, which may (-O0) or may not (-O3) keep the loop, but essentially it will build.

• Rust: this is a totally valid program and will just loop forever. Interestingly, an infinite loop can be assigned to the ! type.

I'm with Rust on this one, the fact that an infinite loop can be optimized away is crazy...

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