This #![no_std] crate provides an assert_has_not_been_called! macro that panics if the surrounding function is called twice. Useful for initialization functions.
#[macro_use]
extern crate once;
fn init() {
assert_has_not_been_called!("the init function must only be called {}", "once");
}
fn main() {
init();
// init(); // "the init function must only be called once"
}Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.