[−][src]Macro try_match::try_match

macro_rules! try_match {
    ($p:pat = $in:expr => $out:expr) => { ... };
    ($p:pat = $($in:tt)*) => { ... };
}

Try to match $in against a given pattern $p. Produces Ok($out) if successful; Err($in) otherwise.

=> $out can be left out, in which case it's implied based on the number of bound variables in $p:

If there are no bound variables, it is implied to be ().
If there is exactly one bound variables var, it is implied to be var.
If there are multiple bound variables var1, var2, ..., it is implied to be AnonymousType { var1, var2 }.

AnonymousType derives Clone and Copy, and Debug if std feature is enabled.