Macro const_str::contains

macro_rules! contains {
    ($haystack: expr, $pattern: expr) => { ... };
}

Returns true if the given pattern matches a sub-slice of this string slice.

Returns false if it does not.

The pattern type must be one of

• &str
• char

Examples

const BANANAS: &str = "bananas";
const A: bool = const_str::contains!(BANANAS, "nana");
const B: bool = const_str::contains!(BANANAS, "apples");
const C: bool = const_str::contains!(BANANAS, 'c');
assert_eq!([A, B, C], [true, false, false]);