Function str_concat::concat [−][src]
pub fn concat<'a>(a: &'a str, b: &'a str) -> Result<&'a str, Error>
Concatenate two string slices if they are adjacent.
If two strs are adjacent to each other in memory, this function concatenates both, creating a single str.
Errors
Returns Err
if the two slices aren't adjacent, a
is after b
, or if
a
is too long for proper concatenation (longer than isize::MAX
).
Examples
Correct usage:
let s = "0123456789"; assert_eq!("0123456", concat(&s[..5], &s[5..7]).unwrap());
Non-adjacent string slices:
let s = "0123456789"; assert_eq!(Err(Error::NotAdjacent), concat(&s[..5], &s[6..7]))