10 releases
Uses old Rust 2015
0.3.4 | Apr 2, 2020 |
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0.3.3 | Jul 8, 2017 |
0.3.2 | May 14, 2016 |
0.2.1 | Apr 11, 2016 |
0.1.3 | Apr 11, 2016 |
#1764 in Rust patterns
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Used in 2 crates
7KB
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Once
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.
Example
#[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"
}
License
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.
Contribution
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.