Crate dont_panic

This crate provides macros that look just like panic!() but instead of panicking, they cause linking error if their calls are not optimized-out. This can be used to ensure the compiler optimizes away some code.

Example

#[macro_use]
extern crate dont_panic;

fn main() {
/*
    let x = 6 * 9;
    if x == 42 {
        dont_panic!("6 * 9 == 42");
    }
*/
let x = false;
if x {
    dont_panic!("42");
}
}

Compile with --release or --features=panic

Macros

dont_panic

This macro doesn’t panic. Instead it tries to call non-existing function. If the compiler can prove it can’t be called an optimizes it away, the code will compile just fine. Else you get linking error.

dp_assert

Like asser but calls dont_panic!() instead of panic!()

Functions

rust_panic_called_where_shouldnt^⚠

This function doesn’t actually exist. It ensures linking error if it isn’t optimized-out.