Provides the match_all! macro for rust
This macro provides similar functionality to a vanilla match statement but allows for multiple expression blocks to be executed.
Format:
rust
match_all!{
value,
IfNoMatch => expr,
pat | pat ... => expr,
...
}
* value: is the value that is wished to be matched on, this can be any function or variable that reduces to a value
* IfNoMatch: the expression after this is executed if none of the other patterns are matched. This branch is optional.
* pat | pat ...: this is groupings of patterns that will be checked. If any of them match to value then their corresponding expression is executed. After checking a group of patterns then the next group is checked until all groups have been checked. If none match then the IfNoMatch expression will be executed.
This can be used to set values of a variable but the following must hold:
IfNoMatch block must be presentExamples:
1. ```rust let value = Some(4);
match_all!{ value,
None => println!("Hi"),
Some(3) | Some(4) => println!("Hello"),
Some(4) | Some(5) => println!("Howdy")
}
> Hello
> Howdy
2.
rust
let x = matchall!{ somefn(),
IfNoMatch => {
println!("No Match");
false
}
0..4 => true
};
```