The `init` function you use would not be valid. You would instead write something like this:
fn f() {
if let Some(i) = init() {
do_stuff(i);
}
}
In this case, the `init` function would return an `Option<i32>`. In a failure state, this would return `None`, and the pattern match would fail. In a success state, this would return `Some(i)`, where i corresponds to the variable you describe.
The Rust pattern is not only safer, but briefer than yours. It describes the code flow such that you can't remove or repeat a part and end up with inadvertently broken code, and it's memory safe. There is no way for `init` to blow up the stack (whereas in your example, a malicious or buggy init can use the address of i to smash the stack.)
Comments
The `init` function you use would not be valid. You would instead write something like this:
In this case, the `init` function would return an `Option<i32>`. In a failure state, this would return `None`, and the pattern match would fail. In a success state, this would return `Some(i)`, where i corresponds to the variable you describe.The Rust pattern is not only safer, but briefer than yours. It describes the code flow such that you can't remove or repeat a part and end up with inadvertently broken code, and it's memory safe. There is no way for `init` to blow up the stack (whereas in your example, a malicious or buggy init can use the address of i to smash the stack.)