So the compiler could have debug mode where it checks the invariants and release mode where it assumes they are true and optimizes around that without checking?

▲

esrauch 4 days ago | parent [-]

Yes, and that same pattern already does exist in C and C++. Asserts that are checked in debug builds but presumed true for optimization in release builds.

▲

mananaysiempre 4 days ago | parent [-]

Not unless you write your own assert macro using C23 unreachable(), GNU C __builtin_unreachable(), MSVC __assume(0), or the like. The standard one is defined[1] to either explicitly check or completely ignore its argument.

[1] https://port70.net/~nsz/c/c11/n1570.html#7.2

	▲	esrauch 4 days ago \| parent [-]
		Yeah, I meant it's common for projects to make their own 'assume' macros. In Rust you can wrap core::hint::assert_unchecked similarly.