A small collections of macros for adding try guards in rust
use try_utils::try_return;
fn my_func1(val: Option<i32>) -> i32 {
let val = try_return!(val, {
// do some expensive computation here
panic!()
});
val
}
assert_eq!(my_func1(Some(10)), 10); // the expensive computation will not be run
fn my_func2(val: Option<i32>) -> i32 {
let val = try_return!(val, 1234);
val
}
assert_eq!(my_func2(Some(10)), 10);
assert_eq!(my_func2(None), 1234);
fn my_func3(val: Option<i32>) {
let _ = try_return!(val);
panic!();
}
my_func3(None);use try_utils::try_continue;
'label: for _ in 0..10 {
for _ in 0..10 {
let _: u32 = try_continue!(None, 'label);
panic!();
}
panic!();
}
for _ in 0..10 {
let val: u32 = try_continue!(Some(10));
assert_eq!(val, 10);
}use try_utils::try_break;
'label: for _ in 0..10 {
for _ in 0..10 {
let _: u32 = try_break!(None, 'label);
panic!();
}
panic!();
}
for _ in 0..10 {
let val: u32 = try_break!(Some(10));
assert_eq!(val, 10);
}