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"
}
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- 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.
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