[−][src]Macro totems::assert_none

macro_rules! assert_none {
    ($option:expr) => { ... };
}

Asserts that an Option is None

Parameters

&option A reference to an Option.

Dependencies

All content must implement Debug

Examples

use totems::assert_none;
let option = "z".parse::<u32>().ok();
assert_none!(&option);

Example Error Messages

thread 'enums::none::is_some' panicked at 'assertion failed: (&option is None)
 &option: Some(5)
', src/enums.rs:743:9